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Improvement of nitrogen accumulation and metabolism in rice (Oryza sativa L.) by the endophyte Phomopsis liquidambari

文献类型： 外文期刊

作者： Yang, Bo 1 ; Ma, Hai-Yan 1 ; Wang, Xiao-Mi 1 ; Jia, Yong 1 ; Hu, Jing 1 ; Li, Xia 2 ; Dai, Chuan-Chao 1 ;

作者机构： 1.Nanjing Normal Univ, Coll Life Sci, Jiangsu Engn & Technol Res Ctr Ind Microbial Reso, Jiangsu Key Lab Microbes & Funct Genom, Nanjing 210023, Jiangsu, Peoples R China

2.Jiangsu Ac

关键词： Fungal endophyte;Nitrogen accumulation;Nitrogen metabolism;Rice;Symbiosis

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The fungal endophyte Phomopsis liquidambari can enhance nitrogen (N) uptake and metabolism of rice plants under hydroponic conditions. To investigate the effects of P. liquidambari on N accumulation and metabolism in rice (Oryza sativa L.) under field conditions during the entire growing season (S1, the seedling stage;S2, the tillering stage;S3, the heading stage;S4, the ripening stage), we utilized pot experiments to examine metabolic and physiological levels in both shoot and root tissues of rice, with endophyte (E+) and without endophyte (E-), in response to three different N levels. We found that under low-N treatment, P. liquidambari symbiosis increased the rice yield and N use efficiency by 12% and by 11.59%, respectively;that the total N contents in E+ rice plants at the four growth stages were separately increased by 29.05%, 14.65%, 21.06% and 18.38%, respectively;and that the activities of nitrate reductase and glutamine synthetase in E+ rice roots and shoots were significantly increased by fungal infection during the S1 to S3 stages. Moreover, P. liquidambari significantly increased the free NH_4~+, NO_3~-, amino acid and soluble protein contents in infected rice tissues under low-N treatment during the S1 to S3 stages. The obtained results offer novel data concerning the systemic changes induced by P. liquidambari in rice during the entire growth period and confirm the hypothesis that the rice eP. liquidambari interaction improved the N accumulation and metabolism of rice plants, consequently increasing rice N utilization in nutrient-limited soil.

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