ジベレリンによる植物成長調節機構の研究と植物遺伝資源の整備(学会賞,受賞業績)

概要

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Gibberellin (GA) is a plant hormone that regulates various physiological phenomena of plants. Studies on the dy mutant of rice indicated that GA_1 is the active form of GA that regulates shoot elongation. To confirm the importance of GA_1 , we successively cloned DY gene that encodes GA 3-oxidase, an enzyme that catalyzes the final step of GA_1 synthesis. Deletion of nine nucleotides that provided reduction in the enzyme activity was found in dy gene. Together with the previous studies on physiology and biochemistry of endogenous gibberellins in rice, we concluded that GA_1 is active per se for the shoot elongation of rice. Biological resources such as dwarf mutants played indispensable roles in the study. In 2001, RIKEN BioResource Center was established, and we started the collection, preservation and distribution of plant resources such as Arabidopsis seeds, plant cultured cells and genes. We have provided approximately 40,000 plant materials to more than 1,600 research groups and laboratories in the world. Reliability of the resource as well as observance of laws and rules is the most important in our resource project.
2013-05-31