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Cytokinin production by microorganisms

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Summary

There is good evidence that bacteria and fungi produce cytokinins. A number of microorganisms excrete cytokinin-active nucleosides and free bases into culture media. Cytokinin-active nucleosides have also been found in the tRNA of all the bacteria and fungi examined so far. The production of zeatin and its derivatives by microorganisms seems to be limited to those which cause diseases in higher plants or enter into symbioses. The symptoms of the plant-microbe interactions often resemble the effects of exogenously applied cytokinins, leading to speculation that microbes excrete cytokinins into host tissue. Some associations involving obligate parasites also exhibit such symptoms, providing circumstantial evidence that these organisms also excrete cytokinins.

Zusammenfassung

Es gibt gute Beweise, dass Bakterien und Pilze Cytokinine synthesieren. Eine Anzahl Mikroorganismen scheiden cytokinin-aktive Nucleoside und freie Basen in Kulturmedien aus. Cytokinin-aktive Nucleoside wurden auch in den t-RNS aller bis jetzt untersuchten Bakterien und Pilzen gefunden. Die Produktion Zeatins und Zeatin-Derivate durch Mikroorganismen scheint sich auf diejenigen zu beschränken, die in höheren Pflanzen Krankheiten erregen oder in Symbiose Verhältnisse eingehen. Symptome von gegenseitigen Pflanzen und Mikroben Verhältnissen ähnelen oft den Wirkungen Cytokinin-Applikationen, was zu der Spekulation veranlasst, dass Mikroben Cytokinine in die Wirtsgewebe ausscheiden. Einige Vereinigungen, die obligate Parasiten betreffen, bezeugen auch solche Symptome, und liefern somit Indizienbeweise, dass diese Organismen auch cytokinine ausscheiden.

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Literature Cited

  • Abou-Mandour, A. A. andO. H. Volk. 1971. Nachweis von Cytokinin-Aktivitat in rostinfizierten Pelargonium-Blättern. Z. Pflanzenphysiol.65: 240–247.

    CAS  Google Scholar 

  • Armstrong, D. J. 1977. Cytokinin constituents of RNA molecules. Symposium address, Annu. Mtg. Am. Soc. Plant Physiol., Madison, Wisconsin, 20 August.

  • —,W. J. Burrows, F. Skoog, K. L. Roy, andD. Söll. 1969b. Cytokinins: distribution in transfer RNA species ofEscherichia coli. Proc. Natl. Acad. Sci. USA63: 834–841.

    PubMed  CAS  Google Scholar 

  • —,P. K. Evans, W. J. Burrows, F. Skoog, J.-F. Petit, J. L. Dahl, T. Steward, J. L. Strominger, N. J. Leonard, S. M. Hecht, andJ. Occolowitz. 1970. Cytokinins: activity and identification inStaphylococcus epidermidis transfer ribonucleic acid. J. Biol. Chem.245: 2922–2926.

    PubMed  CAS  Google Scholar 

  • —,E. Scarbrough, F. Skoog, D. L. Cole, andN. J. Leonard. 1976. Cytokinins inCorynebacterium fascians cultures. Isolation and identification of 6-(4-hydroxy-3-methylcis-2-butenyl-amino)-2-methylthiopurine. Plant Physiol.58: 749–752.

    PubMed  CAS  Google Scholar 

  • —,F. Skoog, L. H. Kirkegaard, A. E. Hampel, R. M. Bock, I. Gillam, andG. M. Tener. 1969a. Cytokinins: distribution in species of yeast transfer RNA. Proc. Natl. Acad. Sci. USA63: 504–511.

    PubMed  CAS  Google Scholar 

  • Arora, N., F. Skoog, andO. N. Allen. 1959. Kinetin-induced pseudonodules on tobacco roots. Am. J. Bot.46: 610–613.

    CAS  Google Scholar 

  • Ashraf, M., E. E. Tylutki, andL. W. Roberts. 1976. Effect of amitrole (3-amino-lH-1,2,4-triazole) on cytokinin activity and sexual reproduction in yeastSchizosaccharomyces octosporus. Mycopathologia59: 151–154.

    PubMed  CAS  Google Scholar 

  • Atkin, B. M. 1970. Factors from yeast extract necessary for cellulose decomposition byClostridium thermocellum. Ph.D. Thesis, University of Wisconsin, Madison.

    Google Scholar 

  • Atkin, C. L. andJ. B. Neilands. 1972. Leaf infections: siderochromes (natural polyhydroxamates) mimic the “green island” effect. Science176: 300–302.

    PubMed  CAS  Google Scholar 

  • Atmar, V. T., G. O. Throneberry, andG. D. Kuehn. 1976. Effects of adenine and cytokinins on growth and protein kinase activity ofVerticillium albo-atrum. Mycopathologia59: 171–174.

    PubMed  CAS  Google Scholar 

  • Azcón, R. andJ. M. Barea. 1975. Synthesis of auxins, gibberellins and cytokinins byAzotobacter vinelandii andAzotohacter beijerinckii related to effects produced on tomato plants. Plant Soil43: 609–619.

    Google Scholar 

  • Babcock, D. F. andR. O. Morris. 1970. Quantitative measurement of isoprenoid nucleosides in transfer ribonucleic acid. Biochemistry9: 3701–3705.

    PubMed  CAS  Google Scholar 

  • Balázs, E. andI. Sziràki. 1974. Altered levels of indoleacetic acid and cytokinin in geranium stems infected withCorynebacterium fascians. Acta Phytopathol. Acad. Sci. Hung.9: 287–292.

    Google Scholar 

  • Barea, J. M. andM. E. Brown. 1974. Effects on plant growth produced byAzotobacter paspali related to synthesis of plant growth regulating substances. J. Appl. Bacteriol.37: 583–593.

    PubMed  CAS  Google Scholar 

  • —,E. Navarro, andE. Montoya. 1976. Production of plant growth regulators by rhizosphere phosphate-solubilizing bacteria. J. Appl. Bacteriol.40: 129–134.

    PubMed  CAS  Google Scholar 

  • —,E. Navarro, A. Palomares, andE. Montoya. 1974. A rapid microbiological assay method for auxins, gibberellic acid and kinetin using yeast. J. Appl. Bacteriol.37: 171–174.

    PubMed  CAS  Google Scholar 

  • Barnes, R. L. andA. W. Naylor. 1959.In vitro culture of pine roots and the use ofPinus serotina roots in metabolic studies. Forest Sci.5: 158–168.

    Google Scholar 

  • Barrell, B. G. andF. Sanger. 1969. The sequence of phenylalanine tRNA fromE. coli. FEBS Lett.3: 275–278.

    PubMed  CAS  Google Scholar 

  • Barthe, P. 1971. Recherche de substances de type cytokinine synthétisées parNectria galligena Bres. var.major Wr., en culture pure. C. R. Acad. Sci. Sér. D272: 2881–2883.

    CAS  Google Scholar 

  • — andC. Bulard. 1974. Identification d’une cytokinine par Chromatographie en phase gazeuse à partir de cultures pures deTaphrina cerasi. Can. J. Bot.52: 1515–1518.

    CAS  Google Scholar 

  • Becking, J. H. 1971. The physiological significance of the leaf nodules ofPsychotria. Plant Soil, Special Volume, 361–374.

  • Bermudez de Castro, F., A. Canizo, A. Costa, C. Miguel, andC. Rodriguez-Barrueco. 1977. Cytokinins and nodulation of the non-legumesAlnns glutinosa andMyrica gale. Pages 539–550in W. Newton, J. R. Postgate, and C. Rodriguez-Barrueco (eds.). Recent developments in nitrogen fixation. Academic Press, London.

    Google Scholar 

  • Biemann, K., S. Tsunakawa, J. Sonnenbichler, H. Feldmann, D. Dütting, andH. G. Zachau. 1966. Structure of an odd nucleoside from serine-specific transfer ribonucleic acid. Angew. Chem. Int. Ed. Eng.5: 590–591.

    CAS  Google Scholar 

  • Blondeau, R. 1970. Production d’une substance de type cytokinine par desArthrobacter d’origine rhizosphérique. C. R. Acad. Sci. Sér. D270: 3158–3161.

    CAS  Google Scholar 

  • —. 1974. Nature d’une cytokinine présente dans les cultures de certainsArthrobacter. C. R. Acad. Sci. Sér D279: 1571–1574.

    CAS  Google Scholar 

  • Bomhoff, G., P. M. Klapwijk, H. C. M. Kester, R. A. Schilperoort, J. P. Hernalsteens, andJ. Schell. 1976. Octopine and nopaline synthesis and breakdown genetically controlled by a plasmid ofAgrobacterium tumefaciens. Mol. Gen. Genet.145: 177–181.

    PubMed  CAS  Google Scholar 

  • Bond, G. 1974. Root-nodule symbioses with actinomycete-like organisms. Pages 342–378in A. Quispel (ed.). The biology of nitrogen fixation. North Holland Publishing Co., Amsterdam and Oxford.

    Google Scholar 

  • Bose, A. andM. Shaw. 1974. Growth of rust fungi of wheat and flax on chemically-defined media. Nature251: 646–648.

    CAS  Google Scholar 

  • Braun, A. C. 1958. A physiological basis for autonomous growth of the crown-gall tumor cell. Proc. Natl. Acad. Sci. USA44: 344–349.

    PubMed  CAS  Google Scholar 

  • Braun, W., W. Firshein, andJ. Whallon. 1957. Effects of desoxyribonucleic acid breakdown products on bacterial population changes and virulence. Science125: 445–447.

    PubMed  CAS  Google Scholar 

  • Burrows, W. J. 1975. Mechanisms of action of cytokinins. Curr. Adv. Plant Sci.7: 837–847.

    Google Scholar 

  • —. 1976. Mode of action of N, N′-diphenylurea: the isolation and identification of the cytokinins in the transfer RNA from tobacco callus grown in the presence of N,N′-diphenylurea. Planta130: 313–316.

    CAS  Google Scholar 

  • —. 1978. Evidence in support of biosynthesisde nova of free cytokinins. Planta138: 53–57.

    CAS  Google Scholar 

  • —,D. J. Armstrong, M. Kaminek, F. Skoog, R. M. Bock, S. M. Hecht, L. G. Dammann, N. J. Leonard, andJ. Occolowitz. 1970. Isolation and identification of four cytokinins from wheat germ transfer ribonucleic acid. Biochemistry9: 1867–1872.

    PubMed  CAS  Google Scholar 

  • ——,F. Skoog, S. M. Hecht, J. T. A. Boyle, N. J. Leonard, andJ. Occolowitz. 1969. The isolation and identification of two cytokinins fromEscherichia coli transfer ribonucleic acids. Biochemistry8: 3071–3076.

    PubMed  CAS  Google Scholar 

  • —,F. Skoog, andN. J. Leonard. 1971. Isolation and identification of cytokinins located in the transfer ribonucleic acid of tobacco callus grown in the presence of 6-benzylaminopurine. Biochemistry10: 2189–2194.

    PubMed  CAS  Google Scholar 

  • Bushnell, W. R. 1966. Delay of senescence in wheat leaves by cytokinins, nickel, and other substances. Can. J. Bot.44: 1485–1493.

    CAS  Google Scholar 

  • — andP. J. Allen. 1962. Induction of disease symptoms in barley by powdery mildew. Plant Physiol.37: 50–59.

    PubMed  CAS  Google Scholar 

  • Callaham, D., P. Del Tredici, andJ. G. Torrey. 1978. Isolation and cultivationin vitro of the actinomycete causing root nodulation inComptonia. Science199: 899–902.

    PubMed  Google Scholar 

  • Chapman, R. W., R. O. Morris, andJ. B. Zaerr. 1976. Occurrence of trans-ribosylzeatin inAgrobacterium tumefaciens tRNA. Nature262: 153–154.

    PubMed  CAS  Google Scholar 

  • Chen, C.-M. andR. H. Hall. 1969. Biosynthesis of N6-(Δ2-isopentenyl) adenosine in the transfer ribonucleic acid of cultured tobacco pith tissue. Phytochemistry8: 1687–1695.

    CAS  Google Scholar 

  • —,R. L. Eckert, andJ. D. McChesney. 1976. N6-(Δ2-isopentenyl) adenosine from crown gall tumor tissue ofVinca rosea. Phytochemistry15: 1565.

    CAS  Google Scholar 

  • Cherayil, J. D. andM. N. Lipsett. 1977. Zeatin ribonucleosides in the transfer ribonucleic acid ofRhizobium leguminosarum, Agrobacterium tumefaciens, Corynebacterium fascians, andErwinia amylovora.. J. Bacteriol.131: 741–744.

    PubMed  CAS  Google Scholar 

  • Chilton, M.-D., M. H. Drummond, D. J. Merlo, D. Sciaky, A. L. Montoya, M. P. Gordon, andE. W. Nester. 1977. Stable incorporation of plasmid DNA into higher plant cells: the molecular basis of crown gall tumorigenesis. Cell11: 263–271.

    PubMed  CAS  Google Scholar 

  • Coppola, S. andM. Giannattasio. 1968a. Attività citochininica in frazioni dell’acido ribonucleico isolato dalRhizobium leguminosarum Frank. Ann. Fac. Sci. Agrar. Univ. Stud. Napoli Portici, IV,3: 403–407.

    Google Scholar 

  • —— 1968b. Attivita’ citochininica in un actinomicete rizosferico. Boll. Soc. Ital. Biol. Sper.44: 1913–1915.

    PubMed  CAS  Google Scholar 

  • —,A. Zoina, andP. Marino. 1976. Interactions of N6-(Δ2-isopentenyl)adenine with cyclic AMP on the regulation of growth and β-galactosidase synthesis inEscherichia coli. J. Gen. Microbiol.94: 436–438.

    PubMed  CAS  Google Scholar 

  • Crafts, C. B. andC. O. Miller. 1974. Detection and identification of cytokinins produced by mycorrhizal fungi. Plant Physiol.54: 586–588.

    PubMed  CAS  Google Scholar 

  • Currier, T. C. andE. W. Nester. 1976. Evidence for diverse types of large plasmids in tumor-inducing strains ofAgrobacterium. J. Bacteriol.126: 157–165.

    PubMed  CAS  Google Scholar 

  • D’Amato, F. 1964. Endopolyploidy as a factor in plant tissue development. Caryologia17: 41–52.

    Google Scholar 

  • Das, N. K., K. Patau, andF. Skoog. 1956. Initiation of mitosis and cell division by kinetin and indoleacetic acid in excised tobacco pith tissue. Physiol. Plant.9: 640–651.

    CAS  Google Scholar 

  • Dekhuijzen, H. M. 1976. Endogenous cytokinins in healthy and diseased plants. Pages 526–559in R. Heitefuss and P. H. Williams (eds.). Physiological plant pathology. Encycl. Plant Physiol., New Series, Vol. 4. Springer-Verlag, Berlin-Heidelberg-New York.

    Google Scholar 

  • — andE. C. T. Gevers. 1975. Recovery of cytokinins during extraction and purification of clubroot tissue. Physiol. Plant.35: 297–302.

    CAS  Google Scholar 

  • — andJ. C. Overeem. 1971. The role of cytokinins in clubroot formation. Physiol. Plant Pathol.1: 151–161.

    CAS  Google Scholar 

  • — andR. C. Staples. 1968. Mobilization factors in uredospores and bean leaves infected with bean rust fungus. Contrib. Boyce Thompson Inst.24: 39–51.

    CAS  Google Scholar 

  • Dravniecks, D. E., F. Skoog, andR. H. Burris. 1969. Cytokinin activation ofde novo thiamine biosynthesis in tobacco callus cultures. Plant Physiol.44: 866–870.

    Google Scholar 

  • Edwards, W. J. andC. E. LaMotte. 1975. Evidence for cytokinin in bacterial leaf nodules ofPsychotria punctata (Rubiaceae). Plant Physiol.56: 425–428.

    PubMed  CAS  Google Scholar 

  • Einset, J. W. andF. K. Skoog. 1977. Isolation and identification of ribosyl-cis-zeatin from transfer RNA ofCorynebacterium fuscians. Biochem. Biophys. Res. Commun.79: 1117–1121.

    PubMed  CAS  Google Scholar 

  • —,E. M. Greene, F. Skoog, E. Doyle, andR. S. Hanson. 1977. Cytokinin production by strains ofAgrobacterium tumefaciens. Plant Physiol.59(Suppl.): 109, and additional data presented at the Annu. Mtg., Am. Soc. Plant Physiol., Madison, Wisconsin, August 1977.

    Google Scholar 

  • —,S. Swaminathan, andF. Skoog. 1976. Ribosyl-cis-zeatin in a leucyl transfer RNA species from peas. Plant Physiol.58: 140–142.

    PubMed  CAS  Google Scholar 

  • Elliott, R. F. 1967. Effects of kinetin and related compounds on growth and sexual reproduction ofSaprolegnia australis. Planta77: 164–175.

    CAS  Google Scholar 

  • Engelbrecht, L. 1968. Cytokinen in den “grunen Inseln” des Herbstlaubes. Flora (Jena), Abt. A,159: 208–214.

    Google Scholar 

  • Everett, G. A. andJ. T. Madison. 1976. Nucleotide sequence of phenylalanine transfer ribonucleic acid from pea (Pisum sativum, Alaska). Biochemistry15: 1016–1021.

    PubMed  CAS  Google Scholar 

  • Farbwerke, Hoechst A.-G. 1964. Effect of kinetin on growth and metabolism of microorganisms. Belgian patent #632,589. Chem. Abstr.61: 6352h.

    Google Scholar 

  • Fittler, F. andR. H. Hall. 1966. Selective modification of yeast seryl-tRNA and its effect on the acceptance and binding functions. Biochem. Biophys. Res. Commun.25: 441 446.

    PubMed  CAS  Google Scholar 

  • —,L. K. Kline, andR. H. Hall. 1968. Biosynthesis of N6(Δ2-isopentenyl)adenosine. The precursor relationship of acetate and mevalonate to the Δ2-isopentenyl group of the transfer ribonucleic acid of microorganisms. Biochemistry7: 940–944.

    PubMed  CAS  Google Scholar 

  • Fuller, W. andA. Hodgson. 1967. Conformation of the anticodon loop in tRNA. Nature215: 817–821.

    PubMed  CAS  Google Scholar 

  • Furuichi, Y., Y. Wataya, H. Hayatsu, andT. Ukita. 1970. Chemical modification of tRNAyeast Tyr with bisulfite. A new method to modify isopentenyladenosine residue. Biochem. Biophys. Res. Commun.41: 1185–1191.

    PubMed  CAS  Google Scholar 

  • Gefter, M. L. andR. L. Russell. 1969. Role of modifications in tyrosine transfer RNA: a modified base affecting ribosome binding. J. Mol. Biol.39: 145–157.

    PubMed  CAS  Google Scholar 

  • Genetello, C., N. Van Larebeke, M. Holsters, A. de Picker, M. Van Montague, andJ. Schell. 1977. Ti plasmids ofAgrobacterium as conjugative plasmids. Nature265: 561–563.

    PubMed  CAS  Google Scholar 

  • Giannattasio, M. andS. Coppola. 1969. Isolamento di citochinine dalRhizobium leguminosarum Frank. Giorn. Bot. Ital.103: 11–17.

    CAS  Google Scholar 

  • Gogala, N. 1970. Einfluss der natürlichen Cytokinine vonPinus sylvestris L. und anderer Wuchsstoffe auf das Mycelwachstum vonBoletus edulis var.pinicolus Vitt. Oesterr. Bot. Z.118: 321–333.

    CAS  Google Scholar 

  • —. 1971. Growth substances in mycorrhiza of the fungusBoletus pinicola Vitt. and the pine treePinus sylvestris L. Dissertation, Cl. IV, Akad. Sci. Art, SlovenicaXIV: 123–302 (cited in Slankis, 1973).

    Google Scholar 

  • Goodman, H. M., J. Abelson, A. Landy, S. Brenner, andJ. D. Smith. 1968. Amber suppression: a nucleotide change in the anticodon of a tyrosine transfer RNA. Nature217: 1019–1024.

    PubMed  CAS  Google Scholar 

  • Guillemaut, P., R. Martin, andJ. H. Weil. 1976. Purification and base composition of a chloroplastic tRNAphe fromPhaseolus vulgaris. FEBS Lett.63: 273–277.

    PubMed  CAS  Google Scholar 

  • Haberlach, G. T., A. D. Budde, L. Sequeira, andJ. P. Helgeson. 1978. Modification of disease resistance of tobacco callus by cytokinins. Plant Physiol.62: 522–525.

    PubMed  CAS  Google Scholar 

  • Hahn, H., I. Heitmann, andM. Blumbach. 1976. Cytokinins: production and biogenesis of N6-(Δ2-isopentenyl)adenine in cultures ofAgrobacterium tumefaciens strain B6. Z. Pflanzenphysiol.79: 143–153.

    CAS  Google Scholar 

  • Hall, R. H. 1973. Cytokinins as a probe of developmental processes. Annu. Rev. Plant Physiol.24: 415–444.

    CAS  Google Scholar 

  • —,L. Csonka, H. David, andB. McLennan. 1967. Cytokinins in the soluble RNA of plant tissues. Science156: 69–71.

    PubMed  CAS  Google Scholar 

  • —,M. J. Robins, L. Stasiuk, andR. Thedford. 1966. Isolation of N6-(γ,γ-dimethylallyl)adenosine from soluble ribonucleic acid. J. Am. Chem. Soc.88: 2614.

    CAS  Google Scholar 

  • Harada, F., H. J. Gross, F. Kimura, S. H. Chang, S. Nishimura andU. L. RajBhandary. 1968. 2-methylthio N6-(Δ2-isopentenyl)adenosine: a component ofE. coli tyrosine transfer RNA. Biochem. Biophys. Res. Commun.33: 299–306.

    PubMed  CAS  Google Scholar 

  • Harley, J. L. 1969. The biology of mycorrhiza. Leonard Hill, London.

    Google Scholar 

  • Hayashi, H., H. Fisher, andD. Soll. 1969. Transfer ribonucleic acid fromMycoplasma. Biochemistry8: 3680–3686.

    PubMed  CAS  Google Scholar 

  • Hecht, S. M., R. M. Bock, N. J. Leonard, R. Y. Schmitz, andF. Skoog. 1970. Cytokinin activity in tRNAphe. Biochem. Biophys. Res. Commun.41: 435–440.

    PubMed  CAS  Google Scholar 

  • Hecker, L. I., M. Uziel, andW. E. Barnett. 1976. Comparative base compositions of chloroplast and cytoplasmic tRNAphe’s fromEuglena gracilis. Nucleic Acids Res.3: 371–380.

    PubMed  CAS  Google Scholar 

  • Helgeson, J. P. andN. J. Leonard. 1966. Cytokinins: identification of compounds isolated fromCorynebacterium fascians. Proc. Natl. Acad. Sci. USA56: 60–63.

    PubMed  CAS  Google Scholar 

  • Henson, I. E. andC. T. Wheeler. 1976. Hormones in plants bearing nitrogen-fixing root nodules: the distribution of cytokinins inVicia faba L. New Phytol.76: 433–439.

    CAS  Google Scholar 

  • —— 1977a. Hormones in plants bearing nitrogen-fixing root nodules: cytokinin levels in roots and root nodules of some non-leguminous plants. Z. Pflanzenphysiol.84: 179–182.

    CAS  Google Scholar 

  • —— 1977b. Hormones in plants bearing nitrogen-fixing root nodules: partial characterization of cytokinins from root nodules ofAlnus glutinosa (L.) Gaertn. J. Exp. Bot.28: 1076–1086.

    CAS  Google Scholar 

  • Hiatt, V. S. andL. A. Snyder. 1973. Phenylalanine transfer RNA species in early development of barley. Biochim. Biophys. Acta324: 57–68.

    CAS  Google Scholar 

  • Hirsch, D. 1970. Tryptophan tRNA ofEscherichia coli. Nature228: 57.

    Google Scholar 

  • Holness, N. J. andG. Atfield. 1974. Nucleotide sequence of tRNACys from baker’s yeast. FEBS Lett.46: 268–270.

    PubMed  CAS  Google Scholar 

  • Hooykaas, P. J. J., P. M. Klapwijk, M. P. Nuti, R. A. Schilperoort, andA. Rörsch. 1977. Transfer ofAgrobacterium tumefaciens Ti plasmid to avirulent agrobacteria and toRhizobium ex planta. J. Gen. Microbiol.98: 477–484.

    Google Scholar 

  • Hua, S. S. 1977. Plasmids in plant tumor inducingPseudomonas strains. Abstr. Annu. Mtg. Am. Soc. Microbiol.77: 141.

    Google Scholar 

  • Imshenetskii, A. A., A. N. Pariiskaya, andO. P. Gorelova. 1976. Presence ofAgrobacterium tumefaciens in nodules on alfalfa roots. Microbiology45: 484–486 (transl. of Mikrobiologiya 45: 561–563).

    Google Scholar 

  • Ingram, D. S. 1969. Abnormal growth of tissues infected withPlasmodiophora brassicae. J. Gen. Microbiol.56: 55–67.

    PubMed  CAS  Google Scholar 

  • Ishikura, H., Y. Yamada, andS. Nishimura. 1971. The nucleotide sequence of a serine tRNA fromEscherichia coli. FEBS Lett.16: 68–70.

    PubMed  CAS  Google Scholar 

  • Johnson, L. B., J. F. Schafer, andA. C. Leopold. 1966. Nutrient mobilization in leaves byPuccinia recondita. Phytopathology56: 799–803.

    Google Scholar 

  • Johnston, J. C. andE. J. Trione. 1974. Cytokinin production by the fungiTaphrina cerasi andTaphrina deformons. Can. J. Bot.52: 1583–1589.

    CAS  Google Scholar 

  • Jones, M. V. 1978. Inhibition of fruiting body formation inMyxococcus xanthus by cytokinins. FEMS Microbiol. Lett.3: 147–149.

    CAS  Google Scholar 

  • Jordan, W. R. andF. Skoog. 1971. Effects of cytokinins on growth and auxin in coleoptiles of derootedAvena seedlings. Plant Physiol.48: 97–99.

    PubMed  CAS  Google Scholar 

  • Kaiss-Chapman, R. W. andR. O. Morris. 1977a. Trans-zeatin in culture filtrates ofAgrobacterium tumefaciens. Biochem. Biophys. Res. Commun.76: 453–459.

    CAS  Google Scholar 

  • —— 1977b. Cytokinin production, plasmid status and virulence inAgrobacterium tumefaciens. Plant Physiol.59(Suppl.): 109, and additional data presented at the Annu. Mtg., Am. Soc. Plant Physiol., Madison, Wisconsin, August 1977.

    Google Scholar 

  • Karling, J. S. 1968. The Plasmodiophorales (2nd ed.). Hafner Publishing Co., New York and London.

    Google Scholar 

  • Kefford, N. P., J. Brockwell, andJ. A. Zwar. 1960. The symbiotic synthesis of auxin by legumes and nodule bacteria and its role in nodule development. Aust. J. Biol. Sci.13: 456–467.

    CAS  Google Scholar 

  • Kemp, D. R. and T. I. Steenson. 1971. Breakdown of indol-3-ylacetic acid byCorynebacterium fascians (Tilford) Dowson. Biochem. J.125: 65P.

  • Kemp, J. D. 1976. Octopine as a marker for the induction of tumorous growth byAgrobacterium tumefaciens strain B6. Biochem. Biophys. Res. Commun.69: 816–824.

    PubMed  CAS  Google Scholar 

  • Kende, H. 1971. The cytokinins. Int. Rev. Cytol.31: 301–338.

    PubMed  CAS  Google Scholar 

  • Kennell, D. 1960. The effects of indoleacetic acid and kinetin on the growth of some microorganisms. Exp. Cell Res.21: 19–33.

    PubMed  CAS  Google Scholar 

  • Kern, H. 1965. Untersuchungen zur genetischen Transformation zwischenAgrobacterium tumefaciens undRhizobium spec. I. Übertragung der Fähigkeit zur Induktion pflanzlicher Tumoren aufRhizobium spec. Arch. Mikrobiol.51: 140–155.

    Google Scholar 

  • — andS. Naef-Roth. 1975. Zur Bildung von Auxinen und Cytokininen durchTaphrina- Arten. Phytopathol. Z.83: 193–222.

    CAS  Google Scholar 

  • Kerr, A., P. Manigault, andJ. Tempé 1977. Transfer of virulencein vivo andin vitro inAgrobacterium. Nature265: 560–561.

    PubMed  CAS  Google Scholar 

  • Kiraly, Z., M. El Hammady, andB. I. Pozsár. 1967. Increased cytokinin activity of rustinfected bean and broad bean leaves. Phytopathology57: 93–94.

    CAS  Google Scholar 

  • Klämbt, D. 1967. Nachweis eines Cytokinins ausAgrobacterium tumefaciens und sein Vergleich mit dem Cytokinin ausCorynebacterium fascians. Wiss. Z. Univ. Rostock, Math. Naturwiss. Reihe16: 623–625.

    Google Scholar 

  • —,G. Thies, andF. Skoog. 1966. Isolation of cytokinins fromCorynebacterium fascians. Proc. Natl. Acad. Sci. USA56: 52–59.

    PubMed  Google Scholar 

  • Klein, D. T., andR. M. Klein. 1953. Transmittance of tumor-inducing ability to avirulent crown-gall and related bacteria. J. Bacteriol.66: 220–228.

    PubMed  CAS  Google Scholar 

  • Klein, R. M. 1965. The physiology of bacterial tumors in plants and of habituation. Pages 209–235in W. Ruhland (ed.). Handbuch der Pflanzenphysiologie, Vol. XV, Pt. 2. Springer-Verlag, Berlin-Heidelberg-New York.

    Google Scholar 

  • Kovoor, R. andD. Klämbt. 1968. Cytokinins in transfer ribonucleic acids. Pages 57–60in F. Wightman and G. Setterfield (eds.). Biochemistry and physiology of plant growth substances. The Runge Press, Ottawa.

    Google Scholar 

  • Kukain, R. A., A. Y. Klintsare, O. K. Mutsenietse, andV. P. Oshkaya. 1974. Detection of cytokinins in the extracellular fractions of purine compounds ofRhizobium meliloti Dangeard. Dokl. Biochem.216: 246–248 (transl. of Dokl. Akad. Nauk SSSR, Ser. Biochem.216: 932–934).

    Google Scholar 

  • Kupila-Ahvenniemi, S. andE. Therman. 1968. Morphogenesis of crown gall. Adv. Morphog.7: 45–78.

    PubMed  CAS  Google Scholar 

  • Lacey, M. S. 1948. Studies onBacterium fascians. V. Further observations on the pathological and physiological reactions ofBact. fascians. Ann. Appl. Biol.35: 572–581.

    Google Scholar 

  • LaMotte, C. E. andN. R. Lersten. 1972. Attempts to obtain bacteria-free plants ofPsychotria punctata (Rubiaceae): growth and root formation in callus cultures. Am. J. Bot.59: 89–96.

    CAS  Google Scholar 

  • Laten, H., J. Gorman, andR. M. Bock. 1978. Isopentenyl adenosine deficient tRNA from an antisuppressor mutant ofSaccharomyces cerevisiae. Nucleic Acids Res.5: 4329–4342.

    PubMed  CAS  Google Scholar 

  • Lee, B. O. 1961. Effects of kinetin on the fertility of some strains ofNeurospora crassa. Nature192: 288.

    Google Scholar 

  • Lee, T. T. 1971. Cytokinin-controlled indoleacetic acid oxidase isoenzymes in tobacco callus cultures. Plant Physiol.47: 181–185.

    PubMed  CAS  Google Scholar 

  • Lersten, N. R. andH. T. Horner, Jr. 1976. Bacterial leaf nodule symbiosis in angiosperms with emphasis on Rubiaceae and Myrsinaceae. Bot. Rev.42: 145–214.

    Google Scholar 

  • Lester, B. R., R. O. Morris, andJ. H. Cherry. 1979. Purification of leucine tRNA isoaccepting species from soybean cotyledons. II. RPC-2 purification, ribosome binding, and cytokinin content. Plant Physiol.63: 87–92.

    PubMed  CAS  Google Scholar 

  • Letham, D. S. 1967. Chemistry and physiology of kinetin-like compounds. Annu. Rev. Plant Physiol.18: 349–364.

    CAS  Google Scholar 

  • Libbenga, K. R. andB. J. Bogers. 1974. Root-nodule morphogenesis. Pages 430–472in A. Quispel (ed.). The biology of nitrogen fixation. North Holland Publishing Co., Amsterdam and Oxford.

    Google Scholar 

  • — andJ. G. Torrey. 1973. Hormone-induced endoreduplication prior to mitosis in cultured pea root cortex cells. Am. J. Bot.60: 293–299.

    CAS  Google Scholar 

  • Lippincott, J. A. andB. B. Lippincott. 1976. Morphogenetic determinants as exemplified by the crown gall disease. Pages 356–388in R. Heitefuss and P. H. Williams (eds.). Physiological plant pathology. Encycl. Plant Physiol., New Series, Vol. 4. Springer-Verlag, Berlin-Heidelberg-New York.

    Google Scholar 

  • Madison, J. T., G. A. Everett, andH.-K. Kung. 1967. Oligonucleotides from yeast tyrosine transfer ribonucleic acid. J. Biol. Chem.242: 1318–1323.

    PubMed  CAS  Google Scholar 

  • — andH.-K. Kung. 1967. Large oligonucleotides isolated from yeast tyrosine transfer ribonucleic acid after partial digestion with ribonuclease Tl. J. Biol. Chem.242: 1324–1330.

    PubMed  CAS  Google Scholar 

  • Magie, A. R. 1963. Physiological factors involved in tumor production by the oleander knot pathogen,Pseudomonas savastanoi. Ph.D. Thesis, Univ. of California, Davis (cited by Wilson, 1965).

  • —,E. E. Wilson, andT. Kosuge. 1963. Indoleacetamide as an intermediate in the synthesis of indoleacetic acid inPseudomonas savastanoi. Science141: 1281–1282.

    PubMed  CAS  Google Scholar 

  • Mandahar, C. L. andI. D. Garg. 1976. Cytokinin activity of powdery mildew infected leaves ofAbelmoschus esculentus. Phytopathol. Z.85: 86–89.

    CAS  Google Scholar 

  • Margulis, L. 1970. Origin of eukaryotic cells. Yale University Press, New Haven.

    Google Scholar 

  • Maruzzella, J. C. andJ. G. Garner. 1963. Effect of kinetin on bacteria. Nature200: 385.

    PubMed  CAS  Google Scholar 

  • Matsubara, S., D. J. Armstrong, andF. Skoog. 1968. Cytokinins in tRNA ofCorynebacterium fascians. Plant Physiol.43: 451–453.

    PubMed  CAS  Google Scholar 

  • — andR. Nakahira. 1967. Cytokinin activity in an extract from the gall ofPlasmodi- ophora-infected root ofBrassica rapa L. Bot. Mag.80: 373–374.

    Google Scholar 

  • McManus, M. A. andJ. M. Ousephparampil. 1964. Growth response of a myxomycete to treatment with plant growth regulating substances. Iowa Acad. Sci.71: 73–77.

    Google Scholar 

  • Miller, C. O. 1967. Zeatin and zeatin riboside from a mycorrhizal fungus. Science157: 1055–1057.

    PubMed  Google Scholar 

  • —. 1968. Naturally-occurring cytokinins. Pages 33–35in F. Wightman and G. Setterfield (eds.). Biochemistry and physiology of plant growth substances. The Runge Press, Ottawa.

    Google Scholar 

  • —. 1971. Cytokinin production by mycorrhizal fungi.In E. Hacskaylo (ed.). Mycorrhizae. USDA Misc. Publ. No. 1189. U.S. Gov. Print. Off., Washington, D.C.

    Google Scholar 

  • —. 1974. Ribosyl-trans-zeatin, a major cytokinin produced by crown gall tumor tissues. Proc. Natl. Acad. Sci. USA71: 334–338.

    PubMed  CAS  Google Scholar 

  • Miura, G. A. andC. O. Miller. 1969. 6-(γ, γ-dimethylallylamino)purine as a precursor of zeatin. Plant Physiol.44: 372–376.

    PubMed  CAS  Google Scholar 

  • Montoya, A. L., M.-D. Chilton, M. P. Gordon, D. Sciaky, andE. W. Nester. 1977. Octopine and nopaline metabolism inAgrobacterium tumefaciens and crown gall tumor cells: role of plasmid genes. J. Bacteriol.129: 101–107.

    PubMed  CAS  Google Scholar 

  • Morris, R. O. 1977. Mass spectroscopic identification of cytokinins. Glucosyl zeatin and glucosyl ribosylzeatin fromVinca rosea crown gall. Plant Physiol.59: 1029–1033.

    PubMed  CAS  Google Scholar 

  • Murai, N., F. Skoog, M. E. Doyle, and R. S. Hanson. 1980. Relationships between cytokinin production, presence of plastids, and fasciation caused by strains ofCorynebacterium fascians. Proc. Natl. Acad. Sci. USA.77(1): In press.

  • Nishimura, S. 1972. Minor components in transfer RNA: their characterization, location, and function. Prog. Nucl. Acid Res. Mol. Biol.12: 49–85.

    CAS  Google Scholar 

  • —,Y. Yamada, andH. Ishikura. 1969. The presence of 2-methylthio-N6-(Δ2-isopentenyl)adenosine in serine and phenylalanine transfer RNA’s fromEscherichia coli. Biochim. Biophys. Acta179: 517–520.

    PubMed  CAS  Google Scholar 

  • Nomura, T., Y. Tanaka, H. Abe, andM. Uchiyama. 1977. Cytokinin activity of discadenine: a spore germination inhibitor ofDictyostelium discoideum. Phytochemistry16: 1819–1820.

    CAS  Google Scholar 

  • Norberg, S.-O. 1968. Studies in the production of auxins and other growth stimulating substances byExobasidium. Symb. Bot. Ups.19: 1–117.

    Google Scholar 

  • Nuti, M. P., A. M. Ledeboer, A. A. Lepidi, andR. A. Schilperoort. 1977. Large plasmids in differentRhizobium species. J. Gen. Microbiol.100: 241–248.

    CAS  Google Scholar 

  • Oduro, K. A. 1975. Factors affecting epidemiology of bacterial fasciation ofChrysanthe-mum maximum. Phytopathology65: 719–721.

    Google Scholar 

  • — andD. E. Munnecke. 1975. Persistence of pea cotyledons induced byCorynebacterium fascians. Phytopathology65: 1114–1116.

    Google Scholar 

  • Patau, K., N. K. Das, andF. Skoog. 1957. Induction of DNA synthesis by kinetin and indoleacetic acid in excised tobacco pith tissue. Physiol. Plant.10: 949–966.

    CAS  Google Scholar 

  • Pedersén, M. 1973. Identification of a cytokinin, 6-(3-methyl-2-butenylamino)purine, in sea water and the effect of cytokinins on brown algae. Physiol. Plant.28: 101–105.

    Google Scholar 

  • Peterkofsky, A. 1968. The incorporation of mevalonic acid into the N6-(Δ2-isopentenyl)adenosine of transfer ribonucleic acid inLactobacillus acidophilus. Biochemistry7: 472–482.

    PubMed  CAS  Google Scholar 

  • — andC. Jesensky. 1969. The localization of N6-(Δ2-isopentenyl)adenosine among the acceptor species of transfer ribonucleic acid ofLactobacillus acidophilus. Biochemistry8: 3798–3809.

    PubMed  CAS  Google Scholar 

  • Peterson, J. B., andC. O. Miller. 1976. Cytokinins inVinca rosea L. crown gall tumor tissue as influenced by compounds containing reduced nitrogen. Plant Physiol.57: 393–399.

    PubMed  CAS  Google Scholar 

  • —— 1977. Glucosyl zeatin and glucosyl ribosylzeatin fromVinca rosea L. crown gall tumor tissue. Plant Physiol.59: 1026–1028.

    PubMed  CAS  Google Scholar 

  • Petit, A., S. Delhaye, J. Tempé, andG. Morel. 1970. Recherches sur les guanidines des tissus de crown gall. Mise en evidence d’une relation biochimique spécifique entre les souches d’Agrobacteriumtumefaciens et les tumeurs qu’elles induisent. Physiol. Vég.8: 205–213.

    CAS  Google Scholar 

  • Phillips, D. A. andJ. G. Torrey. 1970. Cytokinin production byRhizobium japonicum. Physiol. Plant.23: 1057–1063.

    CAS  Google Scholar 

  • —— 1972. Studies on cytokinin production byRhizobium. Plant Physiol.49: 11–15.

    PubMed  CAS  Google Scholar 

  • Playtis, A. J. andN. J. Leonard. 1971. The synthesis of ribosyl-cis-zeatin and thin layer Chromatographic separation of thecis andtrans isomers of ribosylzeatin. Biochem. Biophys. Res. Commun.45: 1–5.

    PubMed  CAS  Google Scholar 

  • Pozsàr, B. I. andZ. Király. 1966. Phloem-transport in rust infected plants and the cytokinindirected long-distance movement of nutrients. Phytopathol. Z.56: 297–309.

    Google Scholar 

  • Prasada Rao, Y. S. andJ. D. Cherayil. 1975. Thionucleoside composition of transfer RNAs inBacillus subtilis andSalmonella typhimurium. Indian J. Biochem. Biophys.12: 183–184.

    Google Scholar 

  • Puppo, A. andJ. Rigaud. 1978. Cytokinins and morphological aspects of French-bean roots in the presence ofRhizobium. Physiol. Plant.42: 202–206.

    CAS  Google Scholar 

  • —— andP. Barthe. 1974. Sur la présence de cytokinines dans les nodules dePhaseolus vulgaris L. C. R. Acad. Sci. Sér. D279: 2029–2032.

    CAS  Google Scholar 

  • Quinn, L. Y., R. P. Oates, andT. S. Beers. 1963. Support of cellulose digestion byClostridium thermocellum in a kinetin-supplemented basal medium. J. Bacteriol.86: 1359.

    PubMed  CAS  Google Scholar 

  • Quispel, A. 1974. The endophytes of the root nodules in non-leguminous plants. Pages 499–520in A. Quispel (ed.). The biology of nitrogen fixation. North Holland Publishing Co., Amsterdam and Oxford.

    Google Scholar 

  • Raa, J. 1971. Indole-3-acetic acid levels and the role of indole-3-acetic acid oxidase in the normal root and club-root of cabbage. Physiol. Plant.25: 130–134.

    CAS  Google Scholar 

  • Rathbone, M. P. andR. H. Hall. 1972. Concerning the presence of the cytokinin, N6-(Δ2-isopentenyl)adenine, in cultures ofCorynebacterium fascians. Planta108: 93–102.

    CAS  Google Scholar 

  • Reddy, M. N. andP. H. Williams. 1970. Cytokinin activity inPlasmodiophora brassicae- infected cabbage tissue cultures. Phytopathology60: 1463–1465.

    CAS  Google Scholar 

  • Roberts, J. W. andJ. Carbon. 1974. Molecular mechanism for missense suppression inE. coli. Nature250: 412–414.

    PubMed  CAS  Google Scholar 

  • Robins, M. J., R. H. Hall, andR. Thedford. 1967. N6-(Δ2-isopentenyl)adenosine. A component of the transfer ribonucleic acid of yeast and of mammalian tissue, methods of isolation, and characterization. Biochemistry6: 1837–1848.

    PubMed  CAS  Google Scholar 

  • Rodrigues Pereira, A. S., P. J. W. Houwen, H. W. J. Deurenberg-Vos, andE. B. F. Pey. 1972. Cytokinins and the bacterial symbiosis ofArdisia species. Z. Pflanzenphysiol.68: 170–177.

    CAS  Google Scholar 

  • Romanow, I., M. A. Chalvignac, andJ. Pochon. 1969. Recherches sur la production d’une substance cytokinique parAgrobacterium tumefaciens (Smith and Town.) Conn. Ann. Inst. Pasteur, Paris117: 58–63.

    CAS  Google Scholar 

  • Rotberg, Y. T., S. A. Berzinya, D. K. Mutsenietse, A. Y. Klintsare, and V. P. Oshkaya. 1975. [Discharge of purine compounds by microorganisms. IV. Detection of cytokinins in culture media of someRhizobium meliloti strains by ion-exchange.] Latv. PSR Zinat. Akad. Vestis No. 3, 85–88 (English summary).

  • Roussaux, J. 1965. Etude préliminaire des modifications induites chez le pois Express Alaska par leCorynebacterium fascians (Tilford) Dowson. Rev. Gén. Bot.72: 21–53.

    Google Scholar 

  • —. 1966. Sur la “fasciation” du Pois en présence de kinétine. C. R. Acad. Sci. Sér. D263: 1077–1080.

    CAS  Google Scholar 

  • Rowan, S. J. 1970. Fusiform rust gall formation and cytokinin of loblolly pine. Phytopathology60: 1225–1226.

    CAS  Google Scholar 

  • Sachs, T. 1975. Plant tumors resulting from unregulated hormone synthesis. J. Theor. Biol.55: 445–453.

    PubMed  CAS  Google Scholar 

  • Samuels, R. M. 1961. Bacterial-induced fasciation inPisum sativum var. Alaska. Ph.D. Thesis, Indiana University, Bloomington.

    Google Scholar 

  • Scarbrough, E., D. J. Armstrong, F. Skoog, C. R. Frihart, andN. J. Leonard. 1973. Isolation of cis-zeatin fromCorynebacterium fascians cultures. Proc. Natl. Acad. Sci. USA70: 3825–3829.

    PubMed  CAS  Google Scholar 

  • Scott, K. J. 1972. Obligate parasitism by phytopathogenic fungi. Biol. Rev. Cambridge Philos. Soc.47: 537–572.

    Google Scholar 

  • Sequeira, L. 1973. Hormone metabolism in diseased plants. Annu. Rev. Plant Physiol.24: 353–380.

    CAS  Google Scholar 

  • Silver, W. S., Y. M. Centifanto, andD. J. D. Nicholas. 1963. Nitrogen fixation by the leafnodule endophyte ofPsychotria bacteriophila. Nature199: 396–397.

    CAS  Google Scholar 

  • Simpkins, I., H. A. Collin, andH. E. Street. 1970. The growth ofAcer pseudaplatanus cells in a synthetic liquid medium: response to the carbohydrate, nitrogenous and growth hormone constituents. Physiol. Plant.23: 385–396.

    CAS  Google Scholar 

  • Skoog, F. andD. J. Armstrong. 1970. Cytokinins. Annu. Rev. Plant Physiol.21: 359–384.

    CAS  Google Scholar 

  • ——J. D. Cherayil, A. E. Hampel, andR. M. Bock. 1966. Cytokinin activity: localization in transfer RNA preparations. Science154: 1354–1356.

    PubMed  CAS  Google Scholar 

  • — andN. J. Leonard. 1968. Sources and structure:activity relationships of cytokinins. Pages 1–18in F. Wightman and G. Setterfield (eds.). Biochemistry and physiology of plant growth substances. The Runge Press, Ottawa.

    Google Scholar 

  • — andC. O. Miller. 1957. Chemical regulation of growth and organ formation in plant tissues culturedin vitro. Symp. Soc. Exp. Biol.11: 118–131.

    Google Scholar 

  • — andR. Y. Schmitz. 1972. Cytokinins. Pages 181–213in F. C. Steward (ed.). Plant physiology. A treatise. Vol. V1B. Academic Press, New York and London.

    Google Scholar 

  • —,F. M. Strong, andC. O. Miller. 1965. Cytokinins. Science148: 532–533.

    PubMed  Google Scholar 

  • Slankis, V. 1973. Hormonal relationships in mycorrhizal development. Pages 231–298in G. C. Marks and T. T. Kozlowski (eds.). Ectomycorrhizae: their ecology and physiology. Academic Press, New York and London.

    Google Scholar 

  • Sommer, N. F. 1961. Production byTaphrina deformons of substances stimulating cell elongation and division. Physiol. Plant.14: 460–469.

    CAS  Google Scholar 

  • Stapp, C. 1955. Zur Pathogenität fluorescierender Bakterien. Beitr. Biol. Pflanz.31: 515–524.

    Google Scholar 

  • Struxness, L. A., D. J. Armstrong, I. Gillam, G. M. Tener, W. J. Burrows, andF. Skoog. 1979. Distribution of cytokinin-active ribonucleosides in wheat germ tRNA species. Plant Physiol.63: 35–41.

    PubMed  CAS  Google Scholar 

  • Surico, G., L. Sparapano, P. Lerario, R. D. Durbin, andN. Iacobellis. 1975. Cytokinin-like activity in extracts from culture filtrates ofPseudomonas savastanoi. Experientia31: 929–930.

    Google Scholar 

  • Swaminathan, S., R. M. Bock, andF. Skoog. 1977. Subcellular localization of cytokinins in transfer ribonucleic acid. Plant Physiol.59: 558–563.

    PubMed  CAS  Google Scholar 

  • Syōno, K., W. Newcomb, andJ. G. Torrey. 1976. Cytokinin production in relation to the development of pea root nodules. Can. J. Bot.54: 2155–2162.

    Google Scholar 

  • Sziràki, I., E. Balàzs, andZ. Király. 1975. Increased levels of cytokinin and indoleacetic acid in peach leaves infected withTaphrina deformans. Physiol. Plant Pathol.5: 45–50.

    Google Scholar 

  • Taris, B. andJ. C. Avenard. 1969. Etude des modifications quantitatives intéressant quelques substances de croissance au niveau des parenchymes foliaires duPrunus persica Siebold et Zuccarini et duPopulus ×euramericana (Dode) Guinier cv. ‘regenerata,’ parasités par lesTaphrina deformans (Berk.) Tul. etTaphrina aurea (Pers.) Fr. C. R. Acad. Sci. Sér. D268: 1069–1072.

    Google Scholar 

  • — andY. Clemencet. 1970. Extraction et étude des substances de croissance produites, en culture pure, par leNectria galligena Bres., agent du chancre européen des arbres fruitiers. C. R. Acad. Sci. Sér. D271: 78–81.

    CAS  Google Scholar 

  • Taya, Y., Y. Tanaka, andS. Nishimura. 1978. 5′-AMP is a direct precursor of cytokinin inDictyostelium discoideum. Nature271: 545–547.

    PubMed  CAS  Google Scholar 

  • Tegley, J. R., F. H. Witham, andM. Krasnuk. 1971. Chromatographic analysis of a cytokinin from tissue cultures of crown gall. Plant Physiol.47: 581–585.

    PubMed  CAS  Google Scholar 

  • Thimann, K. V. 1936. On the physiology of the formation of nodules on legume roots. Proc. Natl. Acad. Sci. USA22: 511–514.

    PubMed  CAS  Google Scholar 

  • — andT. Sachs. 1966. The role of cytokinins in the “fasciation” disease caused byCorynebacterium fascians. Am. J. Bot.53: 731–739.

    CAS  Google Scholar 

  • Thimmappaya, B. andJ. D. Cherayil. 1974. Unique presence of 2-methylthio-ribosylzeatin in the transfer ribonucleic acid of the bacteriumPseudomonas aeruginosa. Biochem. Biophys. Res. Commun.60: 665–672.

    PubMed  CAS  Google Scholar 

  • Thrower, L. B. 1965a. On the host-parasite relationship ofTrifolium subterraneum andUromyces trifolii. Phytopathol. Z.52: 269–294.

    CAS  Google Scholar 

  • —. 1965b. Host physiology and obligate fungal parasites. Phytopathol. Z.52: 319–334.

    Google Scholar 

  • Torrey, J. G. 1961. Kinetin as trigger for mitosis in mature endomitotic plant cells. Exp. Cell Res.23: 281–299.

    PubMed  CAS  Google Scholar 

  • — andD. E. Fosket. 1970. Cell division in relation to cytodifferentiation in cultured pea root segments. Am. J. Bot.57: 1072–1080.

    Google Scholar 

  • Trinchant, J.-C. andJ. Rigaud. 1977. Sur la synthèse des acides indolyl-3-lactique et indolyl-3-acétique par des bactéroïdes extraits de nodules dePhaseolus vulgaris L. et ses relations avec la fixation d’azote atmosphérique. C. R. Acad. Sci. Sér. D284: 301–303.

    CAS  Google Scholar 

  • Tshitenge, G., N. Luyindula, P. F. Lurquin, andL. Ledoux. 1975. Plasmid deoxyribonucleic acid inRhizobium vigna andRhizobium trifolii. Biochim. Biophys. Acta414: 357–361.

    PubMed  CAS  Google Scholar 

  • Ulrich, J. M. 1960. Auxin production by mycorrhizal fungi. Physiol. Plant.13: 429–443.

    CAS  Google Scholar 

  • Upper, C. D., J. P. Helgeson, J. D. Kemp, andC. J. Schmidt. 1970. Gas-liquid Chromatographic isolation of cytokinins from natural sources. 6-(3-methyl-2-butenylamino)purine fromAgrobacterium tumefaciens. Plant Physiol.45: 543–547.

    PubMed  CAS  Google Scholar 

  • Uziel, M. andH. G. Gassen. 1969. Phenylalanine transfer ribonucleic acid fromEscherichia coli B. Isolation and characterization of oligonucleotides from ribonuclease T1 and ribonuclease A hydrolysates. Biochemistry8: 1643–1655.

    PubMed  CAS  Google Scholar 

  • Van Larebeke, N., G. Engler, M. Holsters, S. Van Den Elsacker, I. Zaenen, R. A. Schilperoort, andJ. Schell. 1974. Large plasmid inAgrobacterium tumefaciens essential for crown-gall inducing ability. Nature252: 169–170.

    PubMed  Google Scholar 

  • Vincent, J. M. 1974. Root-nodule symbioses withRhizobium. Pages 265–341in A. Quispel (ed.). The biology of nitrogen fixation. North Holland Publishing Co., Amsterdam and Oxford.

    Google Scholar 

  • Vizárová, G. 1974. Level of free cytokinins in susceptible and resistant cultivars of barley infected by powdery mildew. Phytopathol. Z.79: 310–314.

    Google Scholar 

  • —. 1975. Contribution to the study of cytokinin production by phytopathogenic fungi. Biol. Plant.17: 380–382.

    Google Scholar 

  • Vreman, H. J. andJ. Corse 1975. Recovery of cytokinins from cation exchange resins. Physiol. Plant.35: 333–336.

    CAS  Google Scholar 

  • —,R. Y. Schmitz, F. Skoog, A. J. Playtis, C. R. Frihart, andN. J. Leonard. 1974. Synthesis of 2-methylthio-cis- and trans-ribosylzeatin and their isolation fromPisum tRNA. Phytochemistry13: 31–37.

    CAS  Google Scholar 

  • —,F. Skoog, C. R. Frihart, andN. J. Leonard. 1972. Cytokinins inPisum transfer ribonucleic acid. Plant Physiol.49: 848–851.

    PubMed  CAS  Google Scholar 

  • —,R. Thomas, J. Corse, S. Swaminathan, andN. Murai. 1978. Cytokinins in tRNA obtained fromSpinacia oleracea L. leaves and isolated chloroplasts. Plant Physiol.61: 296–306.

    PubMed  CAS  Google Scholar 

  • White, B. N., R. Dunn, I. Gillam, G. M. Tener, D. J. Armstrong, F. Skoog, C. R. Frihart, and N. J. Leonard. 1975. An analysis of five serine transfer ribonucleic acids fromDrosophila. J. Biol. Chem.250: 515–521.

    PubMed  CAS  Google Scholar 

  • Wilson, E. E. 1965. Pathological histogenesis in oleander tumors induced byPseudomonas savastanoi. Phytopathology55: 1244–1249.

    Google Scholar 

  • Woese, C. R. 1970. Codon recognition: the allosteric ribosome hypothesis. J. Theor. Biol.26: 83–88.

    PubMed  CAS  Google Scholar 

  • Yamada, Y., S. Nishimura, andH. Ishikura. 1971. The presence of 2-methylthio-N6-(Δ2-isopentenyl)adenosine in leucine, tryptophan and cysteine tRNA’s fromEscherichia coli. Biochim. Biophys. Acta247: 170–174.

    PubMed  CAS  Google Scholar 

  • Zachau, H. G., D. Dütting, andH. Feldman. 1966. Nucleotide sequences of two serinespecific transfer ribonucleic acids. Angew. Chem. Int. Ed. Eng.5: 422.

    CAS  Google Scholar 

  • Zikmanis, P. B. 1975. [Determination of cytokinins in culture medium of root nodule bacteriaRhizobium meliloti D-208.] Latv. PSR Zinat. Akad. Vestis No. 7, 69–74 (English summary).

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Greene, E.M. Cytokinin production by microorganisms. Bot. Rev 46, 25–74 (1980). https://doi.org/10.1007/BF02860866

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