摘要： 利用点滴法和喷洒法研究了四个水稻品种的伸长生长在一叶一心期和始穗期对GA₃的敏感性。结果表明：矮鬼的第二叶叶鞘、株高、穗轴与倒二节对GA₃表现为不敏感，而万年青、特矮稻、丛生竹莲矮对GA₃表现为敏感，其中以丛生竹莲矮为最，第二叶叶鞘和株高的增幅高达121.1%和185.1%.利用酶联免疫法测定了4个水稻品种的第二叶叶鞘和穗部的GA₁₊₄含量。发现丛生竹莲矮的第二叶叶鞘和穗部的GA₁₊₄含量显着低于其他3个品种的，而其余三者的GA₁₊₄

关键词: 水稻, 伸长生长, GA₃敏感性, GA₁₊₄含量

Abstract: The sensitivity of the second leave sheath,plant height,panicle axis,the last but one internode of 4 rice cultivars to GA₃ were studied with the microdrop and spraying methods in this experiment.It was found that the second leave sheath,plant height,panicle axis and the last but one internode of Aigui(AG) were non sensitive to GA₃.However,Wannianqing(WNQ),Congshengzhulianai(CSZLA) and Teaidao(TAD) were sensitive to GA₃.CSZLA was the most sensitive,and their second leave sheath and plant height increased to 121.1% and 185.1% respectively.TheGA₁₊₄ contents in the second leave sheath and panicle of 4 rice cultivars.were determined with enzyme linked immuno sorbent assay.The results showed thatGA₁₊₄ contents in CSZLA was remarkably lower than those of the other three cultivars,andGA₁₊₄ contents in WNQ,AG and TAD were　similar.It was suggested that CSZLA was a GA deficient mutant and AG was a GA non sensitive mutant.

Key words: Rice, Elongation, GA₃ sensitivity, GA₁₊₄ content

中图分类号: 

• S511.1