摘要
多效唑处理后,水稻植株内源脱落酸含量比对照升高452.4％,而吲哚乙酸下降82.1％。用外源GA_3逆转多效唑的抑制作用时,脱落酸含量比单施多效唑的减少61.7％,而吲哚乙酸升高560.6％。用氮肥逆转时,脱落酸含量未发生变化,吲哚乙酸含量升高19.0％。可见,多效唑除调节植物内源GA类物质,吲哚乙酸含量和乙烯释放率外,还调节脱落酸含量。
Contents of endogenous abscisic acid (ABA) and indole acetic acid (IAA) in MET-treated and untreated rice plants were assayed in 1988-1989. Samples were collected from the hybrid combination Shanyou 63 (Oryza sativa L. subsp. hsien Ting) grown in plastic pots. The content of endogenous ABA in MET-treated rice seedlings was higher than that in control by 452.4% (Fig. 1). The application of exogenous GA3 or nitrogen fertilizer reversed the growth inhibition effect of MET, while reduced the content of ABA correspondingly (Table 1). The content of endogenous IAA in MET-treated rice seedlings was reduced to only 17.9% of that in control (Fig. 1 and 3). As the application of exogenous GA_3 or N-fertilizer reversed the morphological effects of MET, the content of endogenous IAA in rice seedlings was increased correspondingly (Table 1).
So, the mode of action of MET on morphological changes of rice see-dings was not only through regulating the level of endogenous GA-like substance, IAA and ethylene, but also through that of ABA. Therefore, it is supposed that MET modifies the plant growth pattern through regulating the balance and interaction of various endogenous plant hormones.
出处
《江苏农业学报》
CSCD
1990年第1期38-43,共6页
Jiangsu Journal of Agricultural Sciences
基金
农业部"05-01-04"
国家自然科学基金"3860645"项目的资助
