油菜素甾醇促进黄化水稻第二叶切段偏上性生长与乙烯的关系

RELATIONSHIP BETWEEN ETHYLENE AND BRASSINOSTEROID-INDUCED EPINASTY IN THE SECOND LEAF SEGMENTS OF ETIOLATED RICE SEEDLINGS

油菜素甾醇强烈刺激黄化水稻第二叶切段倾斜的实质是偏上性生长。油菜素甾醇处理的切段的叶枕细胞带发生了不均一的可塑性生长,叶枕薄壁细胞明显增大。油菜素甾醇促进切段偏上性生长的同时伴随着乙烯释放。两促进效应能被乙烯生物合成抑制剂 CoCl_2平行抑制,表明两效应存在正相关。

The phenomenon of brassinosteroid (BS) on rice laminae incli-nation was demonstrated to be epinasty.Elongation in the upper side of thetreated pulvinus was more rapid than elongation in the lowerside. The eff-ect of BS on rice laminae inclination was hardly reversed.BS-induced epi-nasty appeared to be due to stimulation of ethylene production,because theinhibition of ethylene by CoCl_2 also inhibited epinasty.