三十烷醇在GA_3影响水稻幼苗生长和生理性状中的增效作用

Enhancement of Triacontanol to GA 3 in Influencing the Growth and Physiological Characteristics of Rice Seedling

微量三十烷醇（ＴＲＩＡ）与ＧＡ３配合使用，比ＧＡ３单独使用能明显地促进幼苗生长和增加幼苗干物质积累．同时还增强了ＧＡ３对幼叶中叶绿素含量、可溶性蛋白质含量、呼吸速率、细胞膜透性和过氧化物酶活性的影响．ＧＡ３＋ＴＲＩＡ与ＧＡ３处理相比，促进幼叶内源ＧＡ３水平提高，稳定保持内源ＺＴ于一定水平，ＴＲＩＡ在ＧＡ３低浓度时降低ＩＡＡ水平，在高浓度时则提高ＩＡＡ水平．作者认为ＴＲＩＡ可作为ＧＡ３处理时的增效剂．

Triacontanol(TRIA) with trace supplemented to GA 3 is more effective than the single GA 3 in promoting the growth of rice seedlings, and increasing the dry weight accumulation in them. Meanwhile, it was observed that GA 3 supplemented with TRIA made greater effects than those of GA 3 on chlorophyll and soluble protein contents, respiration rate, membrane permeability and activity of peroxidase in young leaves. As compared with GA 3, GA 3+TRIA increased the endogenous GA 3 level and maintained the endogenous ZT in a more stable level. The resulting IAA level was dependent on the GA 3 concentration when the TRIA was supplemented. The present paper suggested that TRIA could be used as a enhancer for GA 3 application.