Anastasia, Mario; Ciuffreda, Pierangela; Puppo, Marina Del, Journal of the Chemical Society. Perkin transactions I, 1983, # 2, p. 383 - 386
作者:Anastasia, Mario、Ciuffreda, Pierangela、Puppo, Marina Del、Fiecchi, Alberto
DOI:——
日期:——
Activity of brassinosteroids in the dwarf rice lamina inclination bioassay
作者:Shozo Fujioka、Takahiro Noguchi、Suguru Takatsuto、Shigeo Yoshida
DOI:10.1016/s0031-9422(98)00412-9
日期:1998.12
Biological activities of brassinolide, its biosynthetic intermediates and some biosynthetically related brassinosteroids were evaluated using modified dwarf rice lamina inclination bioassay. A very strong synergistic effect was observed when IAA was applied together with brassinosteroid. In particular co-application of brassinosteroid and 5 mu g IAA was ca. 300 times more active than a single application of brassinosteroid. Under co-application of 5 mu g IAA, the minimum detectable amount of brassinolide was less than 0.01 ng/rice plant. Biological activity increased according to the order of the biosynthetic pathway. Brassinosteroids in the early C-6 oxidation pathway (6-oxobrassinosteroids) were more active than corresponding brassinosteroids in the late C-6 oxidation pathway (6-deoxobrassinosteroids). Even very early biosynthetic intermediates such as campestanol showed some activity in our modified bioassay. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.