23. ユーカリに環境ストレス耐性付与効果を有するシトクロムP450阻害剤の作用メカニズムの解明

概要

論文の詳細を見る
Triazole compounds like paclobutrazol and uniconazole-P are used as growth retardant. The action mechanism of these is inhibition of the cytochrome P-450. It is widely known that paclobutrazol and uniconazole-P not only inhibit vegetative growth, but give environmental stress tolerance to various plants in recent years. As a result of our paying attention to this feature, we found that the eucalyptus seedling processed by Paclobutrazol or Uniconazole-P showed the tolerance against various environmental stress including drought, high temperature, and low temperature with strong wind. Abscisic acid (ABA) 8'-hydroxylase which is the first step of ABA catabolism to phaseic acid (PA) is a member of cytochrome P-450. When plants have some water stress, ABA accumulate especially in leaves, and in recent years it came to be known that ABA is participating deeply in expression of the environmental stress responsive genes. Moreover, it was proved that the plant overexpressed with ABA synthesized gene become drought stress tolerance. Therefore, we predict that P-450 inhibitors, such as uniconazole-P, inhibits the action of ABA 8'-hydroxylase, and then the increase in the amount of ABA, its precursors and/or its glycosyl ester (ABA-GE) occurs, and stress tolerance may increase by that cause. Then, the quantity ant the ratio of free ABA, ABA-GE, and PA in the eucalyptus seedling adapted to the environmental stress by UNI-P processing was investigated by ELISA and the GC-MS analysis. We report here a possibility that controlling the metabolism of ABA by the cytochrome P-450 inhibitors would be concerned with stress tolerance.
2004-10-13

23. ユーカリに環境ストレス耐性付与効果を有するシトクロムP450阻害剤の作用メカニズムの解明

スポンサーリンク

概要

著者

関連論文

スポンサーリンク