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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 预览 被引量:8

Effects of Rhizosphere Acidity on Activity of Photosystem Ⅱ and Photosynthetic Rate in Malus hupehensis Leaves
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摘要 由于环境污染、酸雨沉降及氮素化肥过度使用等原因,中国土壤已出现大规模酸化现象(Guoetal.,2010)。据报道,目前,我国土壤酸化面积已占国土面积的20%以上,随着工农业生产的不断发展,酸化面积和程度逐渐增加(易杰祥等,2006)。酸化是pH下降的结果, 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.
作者 王利 杨洪强 张召 范伟国 姜倩倩 冉昆 Wang Li , Yang Hongqiang , Zhang Zhao Fan Weiguo Jiang Qianqian Ran Kun(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)
出处 《林业科学》 CAS CSCD 北大核心 2011年第10期 167-171,共5页 Scientia Silvae Sinicae
基金 国家自然科学基金项目(30671452) 山东农业大学博士后项目
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 Malus hupehensis rhizosphere acidity photosynthetic rate photosystemⅡ chlorophyll fluorescence
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