Significance of Spermidine in the Initiation of Adventitious Buds in Stem Segments of Torenia : GROWTH AND DEVELTOPMENT : NATURAL PRODUCTS

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When stem segments of Torenia fournieri Lind. were cultured in vitro, the initiation of adventitious buds, which is usually induced by cyiokinin, was induced by application of polyamines, such as putrescine and spermidine. Addition of arginine had a slight inductive effect. When cyclohexylamine, an inhibitor of spermidine synthase, was added simultaneously with putrescine, induction of the initiation of buds by putrescine was strongly inhibited. However, application of the inhibitor together with spermidine had no effect on the spermidine-induced initiation of buds. The induction of initiation of buds by a cyiokinin, by a calcium ionophore, by cyclic AMP, and by a phorbol ester, which was accompanied in each case by elevation of the levels of endogenous spermidine, was also inhibited by cyclohexylamine. These results suggest the involvement of spermidine in the initiation of adventitious buds in stem segments of Torenia.
日本植物生理学会の論文