Effect of rhizobia symbiosis on lignin levels and forage quality in alfalfa (Medicago sativa L.)

文献类型： 外文期刊

第一作者： Zhang, Zhiqiang

作者： Zhang, Zhiqiang;Chang, Leqin;Cao, Yuman;Zhang, Tong;Wang, Yafang;Liu, Yushi;Zhang, Pan;Hu, Tianming;Yang, Peizhi;Zhang, Zhiqiang;Shao, Linhui;Zhang, Pan;Sun, Xiaoqin;Wu, Yajun

作者机构：

关键词： Alfalfa;Lignin;Medicago sativa;Rhizobia symbiosis;Forage quality

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

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年卷期：

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收录情况： SCI

摘要： Many beneficial effects of symbiotic rhizobia on leguminous plants have been reported. Here we report a novel effect of rhizobia on forage quality in alfalfa. We found that nodulated alfalfa showed an increase in lignin content and a decrease in digestibility in comparison with non-nodulated plants. Detailed studies revealed that nodulation resulted in an increase in monolignol G unit and S unit. An overall increase in lignin content in nodulated alfalfa was associated with more lignified tissues in the stem and an upregulation of transcript levels of several lignin biosynthesis genes. We hypothesize that an increase in lignin content in nodulated alfalfa is a result of defensive response in plants to rhizobial invasion. (C) 2016 Elsevier B.V. All rights reserved.

分类号： S

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