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Chinese Journal of Applied Ecology ›› 2017, Vol. 28 ›› Issue (11): 3535-3543.doi: 10.13287/j.1001-9332.201711.009

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Effects of light quality on leaf senescence and endogenous hormones content in grapevine under protected cultivation

WANG Hai-bo, WANG Shuai, WANG Xiao-di, SHI Xiang-bin, WANG Bao-liang, ZHENG Xiao-cui, WANG Zhi-qiang, LIU Feng-zhi*   

  1. Fruit Research Institute, Chinese Academy of Agricultural Sciences/Ministry of Agriculture Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Xingcheng 125100, Liaoning, China
  • Online:2017-11-18 Published:2017-11-18
  • Contact: *mail:haibo8316@163.com
  • Supported by:
    This work was supported by the Chinese Academy of Agricultural Sciences Innovation Engineering Program (CAAS-ASTIP-2015-RIP-04), the Earmarked Fund for Modern Agro-industry Technology Research System (nycytx-29-zp), the Recommend International Advanced Agricultural Science and Technology Plan (2011-G28), and the National Key Technologies R&D Program of China (2014BAD16B05-2)

Abstract: Two grape varieties ‘Italia’ and ‘Centenial seedless’ cultured in protected and delayed cultivation were used as experimental materials to study the effects of red and blue light quality on chlorophyll content, net photosynthetic rate, and endogenous hormone content during leaf senescence. The results showed that the chlorophyll content and net photosynthetic rate of the grapes were significantly enhanced in the red light treatment. Although the content of endogenous GA3 was decreased, an increase in abscisic acid (ABA) content and a decrease of total content of zeaxanthin (ZR) were obviously slowed, which led to the significant increase in value of (GA3+ZR)/ABA, delaying leaf senescence. In prophase of leaf senescence, the chlorophyll contents, net photosynthetic rate and (GA3+ZR)/ABA of the grapes were lower in the blue light treatment than those in the control, and the leaf senescence in the blue light treatment was accelerated. At late stage of leaf senescence, the chlorophyll content, net photosynthetic rate and (GA3+ZR)/ABA in the blue light treatment were gradually higher than those in the control, and the leaf senescence was delayed to a certain extent. The plant endogenous hormone auxin (IAA) promoted leaf growth and development in prophase of leaf senescence and accelerated leaf aging in late stage of leaf senescence. The leaf senescence rate of ‘Italia’ was slower than that of ‘Centenial seedless’. In conclusion, our experiment suggested that red light was the best on delaying leaf senescence and prolonging the functional period of leaves.