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《Plant Physiology Journal》 2018-04
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Effect of arbuscular mycorrhizal fungus Glomus mosseae on photosynthesis and antioxidation enzyme activities in Actractylodes macrocephala seedlings under copper stress

YANG Guo;LU Ke;ZHU Gao-Liang;PAN Ming-Xin;DONG Li-Jia;LUO Jie;MO Yi-Wei;Academy of Life Science, Shaoxing University;Yuanpei College, Shaoxing University;  
Pot experiments were conducted to investigate effect of arbuscular mycorrhizal fungus(AMF) Glomus mosseae inoculations and copper ion(Cu) additions(0, 200 and 400 mg·kg~(-1)) on seedling growth, photosynthetic characteristics, lipid peroxidation and antioxidation enzyme activities in Actractylodes macrocephala. Results show that, compared to the control, Cu stress significantly inhibited growth and photosynthetic system of A. macrocephala, inhibited membrane lipid peroxidation and decreased activities of antioxidant enzymes. AMF colonized roots of A. macrocephala very well. For AMF inoculated seedlings, copper stress increased contents of chlorophyll a, chlorophyll b and total chlorophyll, net photosynthetic rate(Pn), stomatal conductance(Gs), transpiration rate(T_r), and activities of superoxide dismutase(SOD), superoxide dismutase(POD) and catalase(CAT); decreased intercellular CO_2 concentration(C_i), relative permeability of plasma membrane(MRP) and malondialdehyde(MDA) content. In addition, plant biomass and Cu accumulation in plant were significantly decreased compared to the control. It was suggested that inoculation of AMF effectively alleviates damage of Cu stress on A. macrocephala by increasing photosynthetic ability and antioxidant capacity of A. macrocephala seedlings, and reducing membrane lipid peroxidation and Cu absorption by root system, thus adaptability to Cu stress and improved productivity and quality of A. macrocephala is being achieved.
【Fund】: 国家自然科学基金(31700476);; 绍兴市科技计划项目(2015B70023);; 绍兴文理学院校级项目(2016LG1006);; 浙江省大学生科技创新活动计划(新苗人才计划)项目(2017R428015)~~
【CateGory Index】: S567.239
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