数字农科院2.0

Loss of Lateral suppressor gene is associated with evolution of root nodule symbiosis in Leguminosae

文献类型： 外文期刊

作者： Tengfei Liu;Zhi Liu;Jingwei Fan;Yaqin Yuan;Haiyue Liu;Wenfei Xian;Shuaiying Xiang;Xia Yang;Yucheng Liu;Shulin Liu;Min Zhang;Yuannian Jiao;Shifeng Cheng;Jeff J. Doyle;Fang Xie;Jiayang Li;Zhixi Tian

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关键词： Evolution of root nodule symbiosis;Gene loss;Lateral suppressor;Leguminosae;Phylogenomic analysis

期刊名称： Genome Biology

ISSN： 1474-7596

年卷期： 2024 年 25 卷 1 期

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收录情况： 无来源刊（2024）

摘要： Background: Root nodule symbiosis (RNS) is a fascinating evolutionary event. Given that limited genes conferring the evolution of RNS in Leguminosae have been functionally validated, the genetic basis of the evolution of RNS remains largely unknown. Identifying the genes involved in the evolution of RNS will help to reveal the mystery. Results: Here, we investigate the gene loss event during the evolution of RNS in Leguminosae through phylogenomic and synteny analyses in 48 species including 16 Leguminosae species. We reveal that loss of the Lateral suppressor gene, a member of the GRAS-domain protein family, is associated with the evolution of RNS in Leguminosae. Ectopic expression of the Lateral suppressor (Ls) gene from tomato and its homolog MONOCULM 1 (MOC1) and Os7 from rice in soybean and Medicago truncatula result in almost completely lost nodulation capability. Further investigation shows that Lateral suppressor protein, Ls, MOC1, and Os7 might function through an interaction with NODULATION SIGNALING PATHWAY 2 (NSP2) and CYCLOPS to repress the transcription of NODULE INCEPTION (NIN) to inhibit the nodulation in Leguminosae. Additionally, we find that the cathepsin H (CTSH), a conserved protein, could interact with Lateral suppressor protein, Ls, MOC1, and Os7 and affect the nodulation. Conclusions: This study sheds light on uncovering the genetic basis of the evolution of RNS in Leguminosae and suggests that gene loss plays an essential role.

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