Summary
Reciprocal grafts between plants of the tall variety Alaska and the dwarf Progress No. 9 show that neither roots nor mature leaves determine shoot phenotype. It is demonstrated that differences in stem growth between the two varieties are essentially controlled by a single Mendelian factor, and the effect of this Le locus is not graft transmissible. Combined with published data for gibberellin content this confirms that the Le locus does not control shoot phenotype by regulating gibberellin synthesis. Growth of slender plants (Le la cry s) and early growth of microcryptodwarfs (le la cry c lm) is not inhibited by AMO-1618 at concentrations which greatly reduce growth of tall plants. This is consistent with the suggestion that rapid growth in these varieties, in the absence of the inhibitory effect of La and Cry, is not dependent on endogenous gibberellin.
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References
Baldev, B., Lang, A., Agatep, A. O.: Gibberellin production in pea seeds developing in excised pods: effect of growth retardant AMO 1618. Science 147, 155–157 (1965).
Brian, P. W.: The effect of some microbial metabolic products on plant growth. Symp. Soc. exp. Biol. 11, 166–181 (1957).
—: The gibberellins as hormones. Int. Rev. Cytol. 19, 229–266 (1966).
Carr, D. J., Reid, D. M., Skene, K. G. M.: The supply of gibberellins from the root to the shoot. Planta (Berl.) 63, 382–392 (1964).
De Haan, H.: Length factors in Pisum. Genetica 9, 481–498 (1927).
—: Contributions to the genetics of Pisum. Genetica 12, 321–440 (1930).
Dennis, D. T., Upper, C. D., West, C. A.: An enzymic site of inhibition of gibberellin biosynthesis by AMO-1618 and other plant growth retardants. Plant Physiol. 40, 948–952 (1965).
Jones, R. L., Lang, A.: Extractable and diffusible gibberellins from light and dark-grown pea seedlings. Plant Physiol. 43, 629–634 (1968).
Kende, H., Lang, A.: Gibberellins and light inhibition of stem growth in peas. Plant Physiol. 39, 435–440 (1964).
Köhler, D.: Über den Gibberellingehalt von Zwerg- und Normalerbsen im Rotlicht und die Wirkung von Chlorcholinchlorid auf das Wachstum der Erbsen. Planta (Berl.) 65, 218–224 (1965).
Lundquist, K.: The mutant “micro” in Pisum. Hereditas (Lund) 37, 389–420 (1951).
Paton, D. M., Barber, H. M.: Physiological genetics of Pisum. I. Grafting experiments between early and late varieties. Aust. J. biol. Sci. 8, 231–240 (1955).
Phillips, I. D. J., Jones, R. L.: Gibberellin like activity in bleeding root systems of Helianthus annus detected by a new dwarf pea epicotyl assay and other methods. Planta (Berl.) 63, 269–278 (1964).
Radley, M.: The distribution of substances similar to gibberellic acid in higher plants. Ann. Bot. 22, 297–307 (1958).
Rasmusson, J.: Genetically changed linkage values in Pisum. Hereditas (Lund) 10, 1–152 (1927).
—: Notes on some mutants in Pisum. Hereditas (Lund) 24, 231–257 (1938).
Skene, K. G. M.: Gibberellin-like substances in root exudate of Vitis vinifera. Planta (Berl.) 74, 250–262 (1967).
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The work was supported by United States Atomic Energy Commission Contract No AT (11-1)-1338 wilhe Dr. A.J.McComb was on leave from the University of Western Australia.
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McComb, A.J., McComb, J.A. Growth substances and the relation between phenotype and genotype in Pisum sativum . Planta 91, 235–245 (1970). https://doi.org/10.1007/BF00385483
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DOI: https://doi.org/10.1007/BF00385483