| Influence of decapitation on endogenous hormone of inverse fourth leaf and premature senility of cotton |
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| DOI：10.7606/j.issn.1000-7601.2010.03.29 |
| Key Words: decapitation cotton inverse fourth leaf endogenous hormone premature senility |
| Author Name | Affiliation | | LI Li | 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 | | TIAN Changyan | Xinjiang Instinue of Ecology and Geography CAS, Urumqi 83011, China
Key Laboraory of Oasis Ecology and Desert Environment, Chinse Academy Sciences, Urumqi 830011, China | | HUANG Ziwei | Xinjiang Instinue of Ecology and Geography CAS, Urumqi 83011, China | | WANG Ping | Xinjiang Instinue of Ecology and Geography CAS, Urumqi 83011, China
Key Laboraory of Oasis Ecology and Desert Environment, Chinse Academy Sciences, Urumqi 830011, China | | CHEN Guanwen | Xinjiang Academy of Farming Science, Shiheri 830046, China | | WANG Qiang | Ningbo Institule of Technology, Zhejiang Universiy, Ningbo, Zhejiang 315100, China | | LI Zhongjun | Company 3 of Regiment 30, Xinjiang Production & Construction Group, Kuerle 841006, China |
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| 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. |
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