99 コムギのハードニングにおける内生ブラシノステロイドの関与

概要

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The administration experiments with exogenous BRs in intact plants or cell culture suggested that BRs might enhance cold stress tolerance. But it is not known whether endogenous BR levels increase during induction of cold stress tolerance. Winter wheat has the mechanism of increase in freezing tolerance during cold acclimation. The process is called hardening. In order to clarify the relationship of hardening process and endogenous BRs, we investigated endogenous levels of BRs of wheat during hardening. After hardening treatment, endogenous castasterone decreased, whereas up-stream precursors of BR biosynthesis pathway such as 6-deoxoteasterone and 6-deoxotyphasterol accumulated. The results suggest that endogenous BRs may play an important role in the process of hardening of wheat.
植物化学調節学会の論文
2002-10-31