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A high-resolution transcriptomic atlas depicting nitrogen fixation and nodule development in soybean

Journal of Integrative Plant Biology 2023年第6期65卷 1536-1552页

作者： Baocheng Sun Yu Wang Qun Yang Han Gao Haiyu Niu Yansong Li Qun Ma Qing Huan Wenfeng Qian Bo Ren State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Although root nodules are essential for biological nitrogen fixation in legumes,the cell types and molecular regulatory mechanisms contributing to nodule development and nitrogen fixation in determinate nodule legumes,such as soybean(Glycine max),remain incompletely ***,we generated a single-nucleus resolution transcriptomic atlas of soybean roots and nodules at 14 days post inoculation(dpi)and annotated 17 major cell types,including six that are specific to *** identified the specific cell types responsible for each step in the ureides synthesis pathway,which enables spatial compartmentalization of biochemical reactions during soybean nitrogen *** utilizing RNA velocity analysis,we reconstructed the differentiation dynamics of soybean nodules,which differs from those of indeterminate nodules in Medicago ***,we identified several putative regulators of soybean nodulation and two of these genes,GmbHLH93 and GmSCL1,were as-yet uncharacterized in *** of each gene in soybean hairy root systems validated their respective roles in ***,enrichment for cytokinin-related genes in soybean nodules led to identification of the cytokinin receptor,GmCRE1,as a prominent component of the nodulation ***1 knockout in soybean resulted in a striking nodule phenotype with decreased nitrogen fixation zone and depletion of leghemoglobins,accompanied by downregulation of nodule-specific gene expression,as well as almost complete abrogation of biological nitrogen *** summary,this study provides a comprehensive perspective of the cellular landscape during soybean nodulation,shedding light on the underlying metabolic and developmental mechanisms of soybean nodule formation.

关键词： cytokinin determinate nodule nitrogen fixation nodulation RNA velocity single nucleus RNA sequencing(snRNA-seq) soybean ureide

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