Nitrogen fixation capacity and metabolite responses to phosphorus in soybean nodules

文献类型： 外文期刊

第一作者： Yao, Yubo

作者： Yao, Yubo;Yao, Yubo;Yuan, Hongmei;Wu, Guangwen;Zhao, Dongsheng;Chen, Si;Kang, Qinghua;Yan, Jun;Ma, Chunmei;Gong, Zhenping

作者机构：

关键词： Metabolome; Soybean; Phosphorus levels; Root nodule; Nitrogen fixation; Nitrogenase activity

期刊名称：SYMBIOSIS （ 影响因子：3.109； 五年影响因子：3.029 ）

ISSN： 0334-5114

年卷期： 2022 年 88 卷 1-3 期

页码：

收录情况： SCI

摘要： Phosphorus (P) is necessary for nitrogen fixation in the root nodules of soybeans, a symbiotic process whereby plants support bacterial nitrogen fixation to obtain nitrogen needed for plant growth. Nitrogen accumulation, quantity, weight, specific nitrogenase activity (SNA) and acetylene reduction activity (ARA) of root soybean nodules were analyzed, using a broadly targeted metabolomics method incorporating liquid chromatography-mass spectrometry (LC-MS) to study the effects of P level (1, 11, 31, 61 mg/L denoted by P1, P11, P31, P61) on the types and abundance of various metabolites and on the expression of associated metabolic pathways in soybean root nodules. Nitrogen accumulation, quantity, weight, SNA and ARA of root nodules were inhibited by P stress. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis indicated that root nodules responded to P stress by increasing the number of amino acids and derivatives. Down-regulation of ABA, phosphorylcholine, and D-glucose 6-phosphate affected carotenoid biosynthesis, glycerophospholipid metabolism and sugar metabolism which inhibited nodule nitrogen fixation under P stress. More flavonoids were involved in metabolic processes in soybean root nodules under P stress that regulated the nodulation and nitrogen fixation. The pathway ascorbate and aldarate metabolism, and associated metabolites, were involved in the adaptation of the symbiotic soybean root nodule system to P starvation. This work provides a foundation for future investigations of physiological mechanisms that underly phosphorus stress on soybeans.

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