出典:Wiktionary
出典:『Wiktionary』 (2025/12/18 18:39 UTC 版)
By surface analysis, brassine + -o- + steroid, from Latin brassica.
brassinosteroid (plural brassinosteroids)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/07 21:52 UTC 版)
Brassinosteroids (BRs) are a class of polyhydroxysteroids that have been recognized as a sixth class of plant hormones. These were first explored nearly forty years ago when Mitchell et al. reported promotion in stem elongation and cell division by the treatment of organic extracts of rapeseed (Brassica napus) pollen. Brassinolide was the first isolated brassinosteroid in 1979 when it was shown that pollen from Brassica napus could promote stem elongation and cell divisions, and the biologically active molecule was isolated. The yield of brassinosteriods from 230 kg of Brassica napus pollen was only 10 mg. Since their discovery, over 70 BR compounds have been isolated from plants.