59 植物由来放線菌代謝物中の植物成長調節活性

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Cultured broths of actinomycetes isolated from plants and rhizospheres were examined for plant growth-regulating activities in four bioassays. Approximate six hundred strains of streptomycetes and rare actinomycetes isolated from plants and rhizospheres were used in this experiment. Among these strains, the inhibitory effects of strain T-13, S-42 and S-59 were found in lettuce germination assay with the more potency than ABA. In rice germination seedling growth assay, strains T-5, T-6, T-13 and S-17 showed the inhibition in rice shoot elongation, and the root elongation was strongly inhibited by strain T-5 and S-17. Strain T-34 stimulated the callus growth of soybean hypocothle sections and retarded the chlorophyll degradation in rice leaf segments. These results indicate that the plant-associated actinomycetes may play the physiological function in whole plants through production of plant growth-regulating substances.
植物化学調節学会の論文
2001-10-09