プロヘキサジオンカルシウム塩およびビスピリバックナトリウム塩の植物生育調節剤としての作用特性と利用

抄録

Prohexadione-calcium inhibits 3β- and 2β-hydroxylation steps in the biosynthetic pathway of gibberellin (GA), which involves activation and inactivation of GAs. It shows a lodging-reducing effect on rice, wheat and other crops as an inhibitor of GA activation, while it promotes flowering in stock and fruit development in Japanese pear as an inhibitor of GA inactivation. It also protects apple from a bacterial disease, the fire bright. Bispyribac-sodium, which potently inhibits acetolactate synthase in the biosynthetic pathway of branched-chain amino acids, has been originally developed as a rice herbicide, but it is also utilized as a plant growth regulator such as a weed suppressor in the paddy ridge and a promotor of sugarcane ripening.