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林业科学 ›› 2011, Vol. 47 ›› Issue (10): 167-171.doi: 10.11707/j.1001-7488.20111026

• 研究简报 • 上一篇    下一篇

根区酸化对平邑甜茶叶片光系统Ⅱ活性及光合速率的影响

王利1,3, 杨洪强2,3, 张召1, 范伟国2, 姜倩倩2, 冉昆2   

  1. 1. 山东农业大学农业生态与环境重点实验室 泰安 271018;2. 山东农业大学园艺科学与工程学院 作物生物学国家重点实验室 山东省果树生物学重点实验室 泰安 271018;3. 山东农业大学农业资源利用博士后流动站 泰安 271018
  • 收稿日期:2010-10-08 修回日期:2011-01-04 出版日期:2011-10-25 发布日期:2011-10-25
  • 通讯作者: 杨洪强

Effects of Rhizosphere Acidity on Activity of Photosystem Ⅱ and Photosynthetic Rate in Malus hupehensis Leaves

Wang Li1,3, Yang Hongqiang2,3, Zhang Zhao1, Fan Weiguo2, Jiang Qianqian2, Ran Kun2   

  1. 1. Key Laboratory of Agricultural Ecology and Environment, Shandong Agricultural University Tai'an 271018;2. State Key Laboratory of Crop Biology Shandong Province Key Laboratory of Fruits Biology College of Horticultural Science and Engineering, Shandong Agricultural University Tai'an 271018;3. Post-Doctoral Mobile Station of Agricultural Resource Utilization, Shandong Agricultural University Tai'an 271018
  • Received:2010-10-08 Revised:2011-01-04 Online:2011-10-25 Published:2011-10-25

关键词: 平邑甜茶, 根区酸化, 净光合速率, 光系统Ⅱ, 叶绿素荧光

Abstract:

Malus hupehensis seedling were cultured in a 1/2 strength Hoagland solution with pH3, pH4 and pH6 to study effects of acidity in rhizosphere on their photosythesis, the net photosynthesis (Pn), stomatal conductance (Gs), intercellular CO2 concentration (Ci) and chlorophyll fluorescence parameters in the leaves in 8 days after tredtment. The results showed that the Pn and Gs reduced, the Ci raised; the efficiency of light energy capture by open photosystemⅡ (PSⅡ) reaction centers (F' v/F' m), maximum photochemistry efficiency of PSⅡ(Fv/Fm), actual quantum yield of PSⅡ(ΦPSⅡ), photochemical quenching of PSⅡ(qP) reduced; the fluorescence intensity Fk at 300 μs increased, and the quantum yield for electron transport (φEo), the performance index on absorption basis (PIABS) and the density of active reaction center (RC/CS) all decreased significantly. Furthermore, the range of variation of these parameters increased with reducing pH the solution of rhizosphere. These results displayed that rhizosphere acidification damaged the oxidation and reduction sides of the reaction centers of PSⅡ of the leaves in M. hupehensis, and further decreased the activity of PSⅡand Pn.

Key words: Malus hupehensis, rhizosphere acidity, photosynthetic rate, photosystemⅡ, chlorophyll fluorescence

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