Summary
Bacteria isolated from the rhizosphere of mulberry (Morus indica) as well as from control soil were tested for their effects on the growth of mulberry seedlings and for phytohormone production. About 12.8 per cent of the rhizosphere and 9.7 per cent of the soil isolates produced phytohormones in cultures. Rhizosphere isolates were more active in hormone synthesis than their soil counterparts. Soaking mulberry stem cuttings in culture filtrates of phytohormone synthesisers hastened their rooting. Culture filtrates of many isolates — hormone producers or not — stimulated or inhibited the growth of shoot and/or root of plants. Many cultures could also inhibit the germination of mulberry seeds.
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References
Breed, R. S., Murray, E. G. D., and Smith N. R., Bergey's Manual of Determinative Bacteriology 7th Ed. Williams & Wilkins, Baltimore (1957).
Bowen, G. D. and Rovira, A. D., The effects of micro-organisms on plant growth. I. Development of root and root hairs in sand and agar. Plant and Soil5, 166–188 (1961).
Hiltner, L., Über neuere Erfahrungen und Probleme auf dem Gebiet der Bodenbakteriologie und unter besonderer Berücksichtigung der Gründüngung oder Brache. Arb. Deut. Landw. Ger.98, 59–78 (1904).
Hoagland, R. and Arnon, D. I., The water culture method of growing plants without soil. Univ. California. Agr. Expt. Sta. Circ.,347 (1938).
Khambata, S. R., Iyer, V., Iyer, R. V., Bhat, M. G., and Bhat, J. V., Microflora of some Indian soils as studied by enrichment culture methodology. Indian J. Agr. Sci.30, 91–105 (1960).
Krassilnikov, N. A., Soil microorganisms and higher plants. Office of Technical Services U.S. Department of Commerce, Washington (1958).
Kumar, K and Mahadevan, S., A new test object for bioassay of plant growth substances J. Sci. Research Banaras Hindu Univ.6, 1–9 (1955).
Lochhead, A. G. and Chase, F. E., Qualitative studies on soil microorganisms V. Nutritional requirements of bacterial flora. Soil Sci.55, 189–195 (1943).
McCalla, T. M. and Haskins, F. A., Phytotoxic substances from soil microorganisms and crop residues. Bact. Rev.28, 181–207 (1964).
Rangaswami, G., and Vasantharajan, V. N., Studies on the rhizosphere microflora of citrus trees. I. Quantitative incidence of micro-organisms in relations to root and shoot growth. Can. J. Microbiol.8, 475–478 (1962).
Riviére J., Rhizosphere et croissance du blé. Ann. Agron.14, 619–653 (1963).
Rovira, A. D., The Interactions between plant roots and soil microorganisms. Ann. Rev. Microbiol.19, 214–266 (1965).
Sobieszanski J. Role of Microorganisms in life of cultivated plants. Acta Microbiol. Pol.14, 183–202 (1965).
Society of American Bacteriologists, Manual of Microbiological Methods. McGraw Hill Book Co. N.Y. (1957).
Welte, E. and Trolldenier, H., Einfluss von Mikrofloren Verschiedner Boden und von Bakterienkulturen auf das Pflanzenwachstum. Arch. Mikrobiol.47, 42–56 (1963).
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Vasantharajan, V.N., Bhat, J.V. Interrelations of soil micro-orgamisms and mulberry. Plant Soil 27, 261–272 (1967). https://doi.org/10.1007/BF01373394
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DOI: https://doi.org/10.1007/BF01373394