7 Bryophyllum calycinumにおけるジャスモン酸メチルエステルの二次離層形成効果

概要

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Methyl jasmonated (JA-Me) at a concentration of 0.5% (w/w) applied as lanolin paste in the middle part of internode segments of Bryophyllum calycinum strongly induced the formation of the secondary abscission zone above and below the treatment after 4 to 6 days. The formation of the secondary abscission zone in internode segments was also induced by ethephon (Ethrel, 2-chloroethyl phosphonic acid) at 1% (w/w) and 1-aminocyclopropane-1-carboxylic acid (ACC) at 0.1% and 1% (w/w) in lanolin. Auxin (indole-3-acetic acid at a concentration of 0.1% (w/w) in lanolin extremely inhibited the formation of the secondary abscission zone induced by both but JA-Me and ethephon. Application of ACC produced a large amount of ethylene in internode segments prior to the formation of the secondary abscission zone, JA-Me had little effect. On the other hand, ethephon did not affect the endogenous levels of jasmonates (JA-Me and jasmonic acid) in internode segments after 4-day treatment. These results suggest that jasmonates and ethylene interacting with auxin have an important role in transdifferentiation to the secondary abscission zone, while mechanism by which JA-Me and ethylene induce the formation of the secondary abscission zone seems to be independent each other.
植物化学調節学会の論文
2000-11-02