光质对设施葡萄叶片衰老与内源激素含量的影响

doi:10.13287/j.1001-9332.201711.009

摘要/Abstract

摘要： 以设施延迟栽培条件下叶片衰老速度不同的意大利和无核白鸡心2个葡萄品种为试材,分别进行补充红光和蓝光处理,研究不同光质对叶片衰老过程中叶绿素含量、净光合速率和内源激素含量的影响.结果表明: 与未补光对照相比,红光能够显著提高叶片的叶绿素含量和净光合速率,降低了内源赤霉素(GA₃)含量,但明显减缓了脱落酸(ABA)含量的增加和玉米素核苷(ZR)总含量的减少,从而显著提高了(GA₃+ZR)/ABA值,延缓叶片衰老.叶片衰老前期,蓝光处理叶片叶绿素含量、净光合速率和(GA₃+ZR)/ABA值均低于对照,加速了植株的衰老进程;但在叶片衰老后期,蓝光处理叶绿素含量、净光合速率和(GA₃+ZR)/ABA值逐渐高于对照,在一定程度上延缓了叶片衰老.植物内源激素生长素(IAA)则表现出叶片衰老前期促进叶片生长发育、叶片衰老后期加速衰老的双重作用.意大利叶片衰老速度较无核白鸡心慢.在本试验条件下,红光处理效果最好,有效延缓了叶片衰老进程,延长了叶片的生理功能期.

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.

王海波, 王帅, 王孝娣, 史祥宾, 王宝亮, 郑晓翠, 王志强, 刘凤之. 光质对设施葡萄叶片衰老与内源激素含量的影响[J]. 应用生态学报, 2017, 28(11): 3535-3543.

WANG Hai-bo, WANG Shuai, WANG Xiao-di, SHI Xiang-bin, WANG Bao-liang, ZHENG Xiao-cui, WANG Zhi-qiang, LIU Feng-zhi. Effects of light quality on leaf senescence and endogenous hormones content in grapevine under protected cultivation[J]. Chinese Journal of Applied Ecology, 2017, 28(11): 3535-3543.

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