47.浸透圧ストレス下におけるレタス種子発芽誘導物質の探索(口頭発表)

概要

論文の詳細を見る
Lettuce seed germination was inhibited in D-mannitol solution, because this osmotic stress change the balance of abscisic acid (ABA) synthesis and metabolism during seed germination. It is clear that application of fluridone which is carotenoid biosynthesis inhibitor and N^6-benzyladenine which has an anti ABA action rescue this inhibition of germination. However there are few reports of useful compounds which have this activity. In this study, we searched for germination-induced compounds of lettuce seeds in osmotic stress. In 0.20 M D-mannitol solution, 33 % seeds was germinated after 4 days. Treatments of fluridone (30μM) and benzyladenine (30μM) rescued the inhibition of germination, and that the germination rates were 92 % and 82 %, respectively. Abamine SG (250μM) which is a inhibitor of 9-cis-epoxycarotenoid dioxygenase in ABA biosynthesis has no effect. As a result of screening test, we found out that 4-phenoxybenzaldehyde oxime (1) and 1-naphthoaldehyde oxime(2) induced seed germination in osmotic stress. ABA content in lettuce after 4 days treated with fluridone, benzyladenine , and compound(2) was reduced to 53%,41%, and 34%, respectively less than that of not treatment.
植物化学調節学会の論文
2007-10-05