甲哌鎓对棉花幼苗侧根发生的诱导效应和机理研究  

Effects of Mepiquat Chloride on lateral roots initiation of cotton seedling and its mechanism

作　　者：段留生[1] 张一[1] 唐祚舜 何钟佩[1] 翟志席[1] 

机构地区：[1]中国农业大学作物化学控制研究中心,北京100094

出　　处：《西北植物学报》2002年第4期877-882,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金资助项目 ( 39870 4 83)

摘　　要：以陆地棉 (Gossypium hirsutum L.)中棉所 1 6和中棉所 2 9号为试验材料 ,用垂直板培养法试验结果表明 :40 0 mg· L-1 甲哌钅翁 (DPC)浸种处理显著促进棉花侧根发生 ,侧根原基发生量、发育速度和发生区长度都显著增加。去除侧根后 ,DPC增加侧根原基发生量和发育速度。在低温逆境情况下 ,DPC显著促进侧根发生 ,对增加抗低温能力有利。DPC处理提高了幼苗主根中部生长素、玉米素及其核苷含量 ,可能是诱导侧根发生的内在原因。This paper studied the effects of Mepiquat Chloride (DPC) on initiation and development of lateral roots of cotton seedling,using the upland cotton ( Gossypium hirsutum L.) c.v.Zhongmiansuo 16 and Zhongmiansuo 29 as experiment materials,cultured on glass board after seeds soaking with 400 mg·L -1 DPC solution for 12 hours.DPC increased all the number of lateral roots,root primordia,and the length of the segment where initiated lateral roots and root primordia.It was showed that DPC promoted both the primordia initiation and its development to lateral roots in the experiment of lateral roots removal.Grown under the stress of low temperature,the initiation of lateral roots was also significantly promoted.The levels of endogenous Auxin,Zeatin and Zeatin riboside in the middle segment of primary root were all increased obviously by DPC,which might be the key reason for lateral roots induction.

关 键 词：甲哌Weng 棉花 幼苗 侧根发生 诱导效应 机理 

分 类 号：S562[农业科学—作物学]