矮秆陆地棉陆矮1号主茎顶芽几种激素含量研究

 在棉花株高建成的初蕾到盛花期，研究了陆地棉矮秆品系陆矮1号与高秆对照TM-1及其杂种F₁顶芽内源激素含量变化。结果表明：各时期陆矮1号顶芽中GA₃和IAA含量均低于TM-1和F₁，盛蕾期顶芽GA₃含量分别仅为TM-1和F₁的28.37%和31.04%,初花期IAA含量分别是TM-1和F₁的61.20%和52.76%；陆矮1号和F₁顶芽Z含量最高值出现在初蕾期，随后下降，较TM-1早15 d；陆矮1号顶芽ABA含量除初蕾期与其它品种无显著差异外，其余时期均最高，在盛蕾期、初花期和盛花期分别比TM-1高26.7%、32.4%、132.5%，比F₁高129.1%、87.5%、37.4%。

Endogenous Hormone Contents in Apical Buds of Short-stalked Cotton Lu-ai No.1

The endogenous hormones contents of a dwarf cotton(Gossypium hirsutum L.) line Lu-ai-1,standard line, TM-1, and their hybrid F₁ at different growth stages were presented in the paper. The result showed that the GA₃ and IAA contents in apical buds of Lu-ai-1 at different growth stages were lower than that of TM-1 and F₁, and the GA₃ content in apical buds of Lu-ai 1 at peak squaring stage was only about 28.37% and 31.04% of TM-1 and F₁ , and IAA at first flowering stage was 61.20% and 52.76% of TM-1 and F₁, respectively. The maximal Z content in apical buds of Lu-ai-1 and F₁ was reached at the beginning of squaring, and then decreased gradually, which was 15 days earlier than that of TM-1.The ABA content in apical buds of Lu-ai-1 decreased rapidly after peak squaring stage, but still kept the highest level compared with that of TM-1 and F₁, and the ABA content was 26.7%, 32.4%, 132.5% higher than that of TM-1, and 129.1%, 87.5%, 37.4% higher than that of F₁ at peak squaring stage, first flowering stage and peak flowering stage, respectively.