Journal of Integrative Agriculture ›› 2015, Vol. 14 ›› Issue (7): 1321-1331.DOI: 10.1016/S2095-3119(14)60999-0

• 论文 • 上一篇    下一篇

Ethylene-inhibiting compound 1-MCP delays leaf senescence in cotton plants under abiotic stress conditions

 CHEN Yuan, J T Cothren, CHEN De-hua, Amir M H Ibrahim, Leonardo Lombardini   

  1. 1、Department of Soil and Crop Sciences, Texas A&M University, College Station 77840, USA
    2、Jiangsu Provincial Key Laboratory of Crops Genetics and Physiology, Yangzhou University, Yangzhou 100044, P.R.China
    3、Department of Horticultural Sciences, Texas A&M University, College Station 77840, USA
  • 收稿日期:2014-07-22 出版日期:2015-07-03 发布日期:2015-07-06
  • 通讯作者: CHEN Yuan, Tel: +1-9794224931; Fax: +1-9798450456; E-mail: chenyua3@tamu.edu
  • 基金资助:

    We are grateful for the financial support from AgroFresh (Yakima, WA, 98901, USA) and the National Natural Science Foundation of China (31171479 and 31471435).

Ethylene-inhibiting compound 1-MCP delays leaf senescence in cotton plants under abiotic stress conditions

 CHEN Yuan, J T Cothren, CHEN De-hua, Amir M H Ibrahim, Leonardo Lombardini   

  1. 1、Department of Soil and Crop Sciences, Texas A&M University, College Station 77840, USA
    2、Jiangsu Provincial Key Laboratory of Crops Genetics and Physiology, Yangzhou University, Yangzhou 100044, P.R.China
    3、Department of Horticultural Sciences, Texas A&M University, College Station 77840, USA
  • Received:2014-07-22 Online:2015-07-03 Published:2015-07-06
  • Contact: CHEN Yuan, Tel: +1-9794224931; Fax: +1-9798450456; E-mail: chenyua3@tamu.edu
  • Supported by:

    We are grateful for the financial support from AgroFresh (Yakima, WA, 98901, USA) and the National Natural Science Foundation of China (31171479 and 31471435).

PDF

摘要： Cotton (Gossypium hirsutum L.) plants produce more ethylene when subjected to abiotic stresses, such as high temperatures and drought, which result in premature leaf senescence, reduced photosynthetic efficiency, and thus decreased yield. This study was conducted to test the hypothesis that the ethylene-inhibiting compound 1-methylcyclopropene (1-MCP) treatment of cotton plants can delay leaf senescence under high temperature, drought, and the aging process in controlled environmental conditions. Potted cotton plants were exposed to 1-MCP treatment at the early square stage of development. The protective effect of 1-MCP against membrane damage was found on older compared to younger leaves, indicating 1-MCP could lower the stress level caused by aging. Application of 1-MCP resulted in reduction of lipid peroxidation, membrane leakage, soluble sugar content, and increased chlorophyll content, in contrast to the untreated plants under heat stress, suggesting that 1-MCP treatment of cotton plants may also have the potential to reduce the effect of heat stress in terms of delayed senescence. Application of 1-MCP caused reductions of lipid peroxidation, membrane leakage, and soluble sugar content, together with increases in water use efficiency (WUE), water potential, chlorophyll content, and fluorescence quantum efficiency, compared to the untreated plants under drought, suggesting that 1-MCP treatment of cotton plants may also have the ability to reduce the level of stress under drought conditions. In conclusion, 1-MCP treatment of cotton should have the potential to delay senescence under heat and drought stress, and the aging process. Additionally, 1-MCP is more effective under stress than under non-stress conditions.

关键词: 1-MCP , ethylene , membrane leakage , lipid peroxidation , chlorophyll fluorescence , total soluble sugar

Abstract: Cotton (Gossypium hirsutum L.) plants produce more ethylene when subjected to abiotic stresses, such as high temperatures and drought, which result in premature leaf senescence, reduced photosynthetic efficiency, and thus decreased yield. This study was conducted to test the hypothesis that the ethylene-inhibiting compound 1-methylcyclopropene (1-MCP) treatment of cotton plants can delay leaf senescence under high temperature, drought, and the aging process in controlled environmental conditions. Potted cotton plants were exposed to 1-MCP treatment at the early square stage of development. The protective effect of 1-MCP against membrane damage was found on older compared to younger leaves, indicating 1-MCP could lower the stress level caused by aging. Application of 1-MCP resulted in reduction of lipid peroxidation, membrane leakage, soluble sugar content, and increased chlorophyll content, in contrast to the untreated plants under heat stress, suggesting that 1-MCP treatment of cotton plants may also have the potential to reduce the effect of heat stress in terms of delayed senescence. Application of 1-MCP caused reductions of lipid peroxidation, membrane leakage, and soluble sugar content, together with increases in water use efficiency (WUE), water potential, chlorophyll content, and fluorescence quantum efficiency, compared to the untreated plants under drought, suggesting that 1-MCP treatment of cotton plants may also have the ability to reduce the level of stress under drought conditions. In conclusion, 1-MCP treatment of cotton should have the potential to delay senescence under heat and drought stress, and the aging process. Additionally, 1-MCP is more effective under stress than under non-stress conditions.

Key words: 1-MCP , ethylene , membrane leakage , lipid peroxidation , chlorophyll fluorescence , total soluble sugar