矮秆棉品种陆矮1号株高对外源激素的响应研究  

Response of Plant Height to the Exogenous Hormones of Dwarf Cotton (Gossypium hirsutum L.) Lu-ai No.1

作　　者：刘爱玉[1] 陈金湘[1] 李瑞莲[1] 易九红[1,2] 冯正锐[1] 

机构地区：[1]湖南农业大学农学院,长沙410128 [2]湖南省农业科学研究院作物研究所,长沙410128

出　　处：《棉花学报》2010年第3期248-253,共6页Cotton Science

基　　金：湖南省自然科学基金(06JJ2051;08JJ3079);湖南农业大学稳定人才基金(09WD19)

摘　　要：通过蕾期和花铃期喷施不同浓度的激素,研究了陆地棉矮秆品种陆矮1号对外源激素的敏感性。结果表明:陆矮1号较对照品种对外源激素反应更为敏感,各种浓度的GA3均能显著和极显著地促进陆矮1号的株高增长,以100 mg.L-1和150 mg.L-1浓度处理效果最为显著,对陆矮1号株高的促进率分别达到100.70%和59.15%,对TM-1的株高促进率分别为27.51%和27.88%;ABA显著抑制陆矮1号株高增长,浓度越高抑制作用越强,40 mg.L-1时促进率为-31.03%;低浓度(20 mg.L-1)的IAA处理能极显著地促进陆矮1号株高的增长,高浓度处理则表现抑制作用;高浓度KT处理显著抑制陆矮1号株高增长,低浓度处理有促进作用但不显著;4种激素混合喷施对陆矮1号株高的促进作用表现出拮抗效应,促进率远低于GA3单独喷施。The study was undertaken to assess the sensitivity of plant height of Dwarf cotton（Gossypium hirsutum L.） Lu-ai No.1 to ectohormone through spraying different concentrations of hormones at the budding stage and flower-boll stage.The results showed that： Lu-ai No.1 was more sensitive to the exogenous hormones than the CK,various concentrations of GA3 can promote plant height of Lu-ai No.1 significantly,especially under 100 mg.L-1 and 150 mg.L-1 concentration,the promoting rate of 100.70% and 59.15% for Lu-ai No.1,while 27.51% and 27.88% for TM-1（CK）,respectively.ABA significantly inhibited the plant height of Lu-ai No.1,the higher concentration,the stronger inhibition,the promotion rate was-31.03% under 40 mg.L-1.Lower concentration（20 mg.L-1） of the IAA treatment can significantly promote the plant height of dwarf Lu-ai No.1 and re-verse under higher concentrations;higher concentration of KT treatment significantly inhibited the plant height of Lu-ai No.1,but lower concentrations indistinctively promoted.Mixed spraying with four kinds of hormones showed up antagonistic effect on promoting plant height of Lu-ai No.1,with much lower promoting rate than that of GA3 treatment alone.

关 键 词：陆地棉 陆矮1号 株高 外源激素 敏感性 

分 类 号：S562.01[农业科学—作物学]