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By S. Tamura (auth.), Nobutaka Takahashi, Bernard O. Phinney, Jake MacMillan (eds.)

ISBN-10: 1461230020

ISBN-13: 9781461230021

ISBN-10: 146127754X

ISBN-13: 9781461277545

The cultivation of rice in Japan has suffered from harm brought on by baka­ nae illness, during which rice seedlings convey irregular development (elongation) because the results of an infection by means of a plant pathogen. research of the taxonomy of this pathogen ended in the graduation of gibberellin (GA) examine between jap plant pathologists, who later pointed out it as Gibberella jujikuroi, its different identify being Fusarium moniliforme. In 1926, Kurosawa demon­ strated the incidence of an lively precept within the tradition media of fungus that confirmed a similar signs as these of the rice illness. In 1938, this discovering was once via the winning isolation of the lively ideas as crystals from the tradition filtrate. This used to be accomplished via the japanese agri­ cultural chemists Yabuta and Sumiki, of The college of Tokyo, who named those lively ideas gibberellins A and B. Following international warfare II, this discovery attracted the curiosity of scientists worldwide, and study on GA used to be pursued on a global scale. the most amazing discoveries in GA learn after the isolation of GA because the metabolite of the plant pathogen has to be the isolation and characterization of gasoline from tissues of upper crops via the MacMillan staff, West and Phinney, and the Tokyo collage team in 1958 and 1959. therefore, fuel were famous as the most vital periods of plant hormones.

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We wish to thank the following for their generous gifts of labeled GAs used in this work: Drs. P. E. Graebe for (14C]GAs3 and (14C]GAw, Dr. N. Mander for (2H]GA 19 , and Dr. L. Willis for [13C,3H]GA3' Finally, we are most grateful to Dr. M. Smith for her valuable advice. References 1. Fujioka S, Yamane H, Spray CR, et aJ. Qualitative and quantitative analyses of gibberellins in vegetative shoots of normal, dwarf-1, dwarf-2, dwarf-3, and dwarf-5 seedlings of Zea mays L. Plant PhysioJ. 1988; 88:1367-1372.

2. Organ-Specific GAs in Rice 11 Table I. GA34 GAt. GAg<. GA)9. GA20• GA29 • GA44 GAt. GA)9' GA20 GAt. GA)7. GA)9. GA20 GAt. GA)9. GA20 GAt. GA)9. GA20 • GA29 GA{. GA)9' GA20• GA29• G~. GA53 GA4• GA9• GA24• GA34• GA5) GA4 GA4 • GA34 , GA5) G~. GA9• GA34 , GA5) GA4, GA9, GA)2' GA24, GA34; GA5) GA34 , GA5) a GAs were identified in plant materials harvested in 1981-1984 bTentatively identified in seedlings

1988; 7: 145-151. 9. Kobayashi M, Kamiya Y, Sakurai A, et al. Metabolism of gibberellins in cellfree extracts of anthers from normal and dwarf rice. Plant Cell Physiol. 1990; 31:289-293. O. R. Spray, Y. Suzuki, and P. ). These dwarf mutants are GA mutants in that they exhibit normal growth in response to exogenous GA; they do not respond to any other plant hormones or growth regulators. The location of the specific steps blocked by the mutants has been based on the following information: (1) the identification of the GAs native to maize shoots I ; (2) the relative bioactivities of the maize GAs on each of the four mutants2 ; (3) the quantification of the GAs present in normal, dJ, d2, d3, and dS maize shoots l ; and (4) the metabolic fate of the label after feeds of double-labeled GAs and their precursors to normal and mutant maize shoots3 and to cell-free systems.

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Gibberellins by S. Tamura (auth.), Nobutaka Takahashi, Bernard O. Phinney, Jake MacMillan (eds.)

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