P-47 ダイズの一回結実性老化を制御する内生因子に関する研究(ポスター発表の部)

概要

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Senescense in monocarpic plants, such as legumes, is dramatic because the entire resources of the plant are mobilized and redirected to support seed development. It is considered that monocarpic senescence is usually induced by the reproductive structures. Senescence-promoting hormones probably exist in the structures but have not been identified with certainty. We examined a time-course change of the senescence-promoting activity in soybean pods. The activity increased simultaneously with flowering and had a maximum peak just before senescence-beginning. It was expected that unknown senescene-promoting substance was biosynthesized in ripening pods and then promoted monocarpic senescence. It was found that senescence hormone, abscisic acid (ABA), and two synergists, one of which was identified to be jasmonic acid (JA), existed in soybean pods and probably induced monocarpic senescence of soybean. Furthermore, the result of time-course change of JA indicated that JA plays an important role in beginning monocarpic senescence.
天然有機化合物討論会の論文
2005-09-15