蓝粒小麦植株发育进程中内源激素的变化

Dynamic Changes in Endogenous Hormones in Blue-grained Wheat Plants in Different Developmental Stages

研究了蓝粒小麦随孕穗期、抽穗期、开花期、灌浆期和成熟期的发育进程中叶片内源激素的动态变化,结果表明,①蓝粒小麦河东乌麦、031-1和白粒对照小麦绵阳26在发育进程中IAA含量的变化趋势基本一致,从孕穗期到开花期IAA含量逐渐下降,在开花期,出现一个低谷,随后迅速上升,到灌浆期达到高峰.且总体水平上,两个蓝粒小麦的IAA含量高于绵阳26.②参试材料的赤霉素含量随发育进程呈单峰曲线变化,灌浆期达到最高值,只有031-1在孕穗期到抽穗期之间赤霉素含量稍有下降.参试蓝粒小麦在灌浆期和成熟期的赤霉素含量都高于白粒对照.③玉米素核苷(ZR)含量的动态变化在蓝粒小麦和白粒对照小麦之间有相同的变化趋势,在孕穗期和成熟期,蓝粒小麦的ZR含量都低于对照绵阳26.④蓝粒和对照白粒小麦叶片中的ABA含量随发育进程的推进,呈逐渐增加的趋势.从孕穗期到开花期,蓝粒小麦的ABA含量高于白粒对照小麦,到成熟期,ABA含量则低于白粒对照小麦.⑤蓝粒小麦的IAA+GA3+ZR/ABA在孕穗期、灌浆期和成熟期都高于白粒对照小麦.

Dynamic chan heading, flowering, see ges in e d-filling ndogenous hormones in the leaves of blue-grained wheat during booting, and maturing stages were analyzed. The change tendency of IAA content in the leaves of blue-grained wheat cultivars Hedong Wumai and 031-1 during the developmental stages were almost the same as that of the white-grained control cultivar Mianyang 26. IAA content decreased gradually from the booting stage to the heading stage and its minimum appeared at the flowering stage, followed by a IAA contents sharp increase in blue-grained thereafter until the maximum wheat were higher than that appeared in the wh at the seed-filling stage. In general, ite-grained wheat Mianyang 26. The changes in GA content in the test materials during various developmental stages showed a single peak curve, which reached the highest at the seed-filling stage, with the exception of 031-1, which had a slight decrease in GA content from the booting stage to the heading stage. The GA content in blue-grained wheat at the seed-filling stage and maturing stage was higher than that in the white-grained wheat. The change tendency of zeatin ribosides （ZR） in blue-grained wheat was similar to that in white-grained wheat. The ZR content in blue-grained wheat was lower than that in white-grained wheat at the booting stage and the maturing stage. ABA content in the leaves of all the test materials increased gradually with the development of the plants. ABA content in blue-grained wheat was h the booting stage to the heading stage, but lower than that in gher than that in white-grained wheat from white-grained wheat at the maturing stage. The ratio of IAA＋GAa ＋ZR/ABA in blue-grained wheat was higher than that in white-grained wheat at the booting, seed-filling and maturing stages.