Studies on the Dormancy and Germination of Rice Seed:II. Relation between seed dormancy and growth substances in rice

概要

論文の詳細を見る
Using the paper chromatography and Avena straight growth test method, the relation between seed dormancy and growth substances in seeds of Hadsaduri and other 4 varieties was investigated, in order to make clear the action of growth substances on seed dormancy in rice.<BR>1. There was recognized the clear relation between seed dormancy and growth inhibitors in seeds, that is, the quantities of growth inhibitors were detected in rich amount in the seeds which was ascertained as highly dormant period, and moreover they were gradually decreased in proportion to advancement of seed age. Then, the dormancy of seeds was broken when inhibitors disappeared mostly in seeds.<BR>2. Growth substances of acidic fraction in dormant husked-seeds extracts were composed of two growth inhibitors and one growth promotor, but those in dormant hull contained only two inhibitors.<BR>3. Growth inhibitors on chromatograms were found in Rf 0.7-0.8 and 0.9-1.0 zones, the former was estimated as abscisic acid according to Rf value on the chromatograms and latter was thought as indolic compound reacted to Ehrlich's reagent.<BR>4. Little growth inhibitors were recognized in seeds when seed germination could perfectly occur, and such tendency was not almost differed with the whole varieties used on histograms of growth substances.
日本熱帯農業学会の論文