Ethylene-inhibiting compound 1-MCP delays leaf senescence in cotton plants under abiotic stress conditions
Ethylene-inhibiting compound 1-MCP delays leaf senescence in cotton plants under abiotic stress conditions
复制标题
乙烯抑制化合物 1-MCP 延缓非生物胁迫条件下棉株叶片衰老
DOI：
10.1016/s2095-3119(14)60999-0
复制
发表时间：
2015-01-01
影响因子：
4.8
通讯作者：
Lombardini, Leonardo
中科院分区：
文献类型：
--
作者：
Chen Yuan;Cothren, J. T.;Lombardini, Leonardo
棉花（Gossypium hirsutum L.）在高温和干旱等非生物胁迫下产生更多的乙烯，导致叶片过早衰老，降低光合效率，从而降低产量。本研究旨在验证乙烯抑制化合物1-甲基环丙烯（1-MCP）处理棉花在高温、干旱和受控环境老化过程中延缓叶片衰老的假设。盆栽棉花植株在发育早期进行1-MCP处理。1-MCP对衰老叶片膜损伤的保护作用大于对年轻叶片膜损伤的保护作用，表明1-MCP可以降低衰老引起的应激水平。与未处理的棉花相比，施用1-MCP导致棉花的脂质过氧化、膜渗漏、可溶性糖含量减少，叶绿素含量增加，这表明1-MCP处理在延迟衰老方面也可能具有减少热胁迫影响的潜力。在干旱条件下，与未处理棉花相比，施用1-MCP可降低棉花的脂质过氧化、膜渗漏和可溶性糖含量，提高水分利用效率（WUE）、水势、叶绿素含量和荧光量子效率，表明1-MCP处理棉花也可能具有降低干旱条件下胁迫水平的能力。综上所述，1-MCP处理可延缓棉花在高温和干旱胁迫下的衰老进程。此外，1-MCP在应激条件下比在非应激条件下更有效。
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.