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打顶后棉花倒四叶内源激素的变化及与早衰的关系
引用本文:李莉,田长彦,黄子蔚,王平,陈冠文,王强,李中军.打顶后棉花倒四叶内源激素的变化及与早衰的关系[J].干旱地区农业研究,2010,28(3):162-168.
作者姓名:李莉  田长彦  黄子蔚  王平  陈冠文  王强  李中军
作者单位:1. 中国科学院新疆生态与地理研究所,新疆,乌鲁木齐,830011;中国科学院绿洲生态与荒漠环境重点实验室,新疆,乌鲁木齐,830011;中国农业大学资源与环境学院,北京,100193
2. 中国科学院新疆生态与地理研究所,新疆,乌鲁木齐,830011;中国科学院绿洲生态与荒漠环境重点实验室,新疆,乌鲁木齐,830011
3. 中国科学院新疆生态与地理研究所,新疆,乌鲁木齐,830011
4. 新疆农垦科学院,新疆,石河子,830046
5. 浙江大学宁波理工学院生物与制药工程系,浙江,宁波,315100
6. 新疆农二师30团3连,新疆,库尔勒,841006
基金项目:新疆自治区科技支疆项目,中国科学院农业项目,农业部公益性行业科研专项,IPNI加拿大国际植物营养研究所北京办事处资助 
摘    要:测定新疆石河子垦区棉花打顶后倒四叶内源激素含量的变化,分析激素在不同时间段的变化。结果表明:(1)打顶能改变倒四叶中IAA(生长素)、CTK(细胞分裂素)和ABA(脱落酸)含量的变化趋势,并在72 h内和对照有显著差异。(2)打顶后涂抹NAA(萘乙酸)不能完全取代IAA的作用,但能明显改变IAA、CTK和GA3(赤霉素)含量的变化规律,保持ABA含量的稳定。(3)棉花倒四叶中各激素的比值在含量上存在相互制约的动态平衡关系;外用生长素能降低衰老激素和生长激素中的比值;打顶打破了这种平衡关系,大幅度增加了ABA/IAA和ABA/CTK的比值,这可能是打顶能促进棉花早衰的生理原因。

关 键 词:打顶  棉花  倒四叶  内源激素  早衰

Influence of decapitation on endogenous hormone of inverse fourth leaf and premature senility of cotton
LI Li,TIAN Changyan,HUANG Ziwei,WANG Ping,CHEN Guanwen,WANG Qiang,LI Zhongjun.Influence of decapitation on endogenous hormone of inverse fourth leaf and premature senility of cotton[J].Agricultural Research in the Arid Areas,2010,28(3):162-168.
Authors:LI Li  TIAN Changyan  HUANG Ziwei  WANG Ping  CHEN Guanwen  WANG Qiang  LI Zhongjun
Institution:Xinjiang Instinue of Ecology and Geography CAS, Urumqi 83011, China; Key Laboraory of Oasis Ecology and Desert Environment, Chinse Academy Sciences, Urumqi 830011, China; College of Resources and Environmental Sciences, China Agriculural University, Bejing 100193, China;Xinjiang Academy of Farming Science, Shiheri 830046, China;Ningbo Institule of Technology, Zhejiang Universiy, Ningbo, Zhejiang 315100, China; Company 3 of Regiment 30, Xinjiang Production & Construction Group, Kuerle 841006, China
Abstract:We studied the influence of decapitation on endogenous hormone in inverse fourth leaf of cotton and ana- lyzed hormone change in different period of time after the decapitation. The results show as follows: (1) After decapita-tion, the tendency of content of IAA, CTK and ABA hormone in cotton inverse fourth leaf plant changes, and has a no-table discrepancy of the change tendency in 72 hours compared to CK. (2) The NAA can not completely replace IAA, but can change remarkably the tendency of the content of IAA, CTK and CA 3 to keep the stability of ABA content. (3)It is suggested that there is restrictive relationship among different hormones in cotton inverse fourth leaf; NAA can lower the ratio of hormone of premature senility and growth. After decapitation, the balance relation of hormones in cotton in-verse fourth leaf is broken, and the ratios of ABA/IAA and ABA/CTK are greatly increased in inverse fourth leaf, and all these become the physiological reason of cotton premature senility.
Keywords:decapitation  cotton  inverse fourth leaf  endogenous hormone  premature senility
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