烟草株高变异体的茎尖中内源激素含量变化及其对外源激素的响应  

Changes in Endogenous Hormone Contents in Shoot-tip of Tobacco (Nicotiana tabacum L.) Genotypes with Different Plant Height and Response to the Exog-enous Hormones

作　　者：杨铁钊[1] 杨欣玲[1] 殷全玉[1] 郭志民[1] 

机构地区：[1]河南农业大学农学院,郑州450002

出　　处：《植物生理学通讯》2006年第4期643-647,共5页Plant Physiology Communications

基　　金：河南省烟草专卖局重点科技攻关项目(hykj200201)。

摘　　要：烟草矮秆基因型‘农大202’的茎生长过程中茎尖中内源赤霉素(GA3)、生长素(IAA)含量始终低于中、高秆基因型,其内源脱落酸(ABA)和玉米素(ZR)含量则相对较高。喷施外源激素GA3和IAA的结果表明,GA3可调节矮秆基因型茎尖中各内源激素的含量,与正常株高基因型‘K326’的各激素含量相接近,从而促进茎生长,而IAA的作用较小。The dynamic changes in gibberellic acid （GA3）, auxins （IAA）, abscisic acid （ABA） and cytokinin （ZR） contents were analyzed for 3 tobacco genotypes with different plant height during the growth stage. The GA3 and IAA contents in shoot-tip of dwarf tobacco genotypes ＇ND202＇ were lower than those of the others. In contrast, the ABA and ZR contents were higher. The results indicated that endogenous hormone contents in shoot-tip of dwarf tobacco genotype ＇ND202＇ could be regulated to normal genotype ＇K326＇ by exogenous hormone GA3.

关 键 词：烟草 矮秆 内源激素 

分 类 号：S572[农业科学—烟草工业]