Identification and Molecular Characterization of RWP-RK Transcription Factors in Soybean
文献类型: 外文期刊
第一作者: Amin, Nooral
作者: Amin, Nooral;Khalifa, Mohamed A. S.;Du, Yeyao;Mandozai, Ajmal;Piwu, Wang;Ahmad, Naveed;Khalifa, Mohamed A. S.;Khattak, Aimal Nawaz
作者机构:
关键词: RWP-RK gene family; gene expression; abiotic stresses; Phytophthora sojae; nodulation; soybean
期刊名称:GENES ( 影响因子:3.5; 五年影响因子:3.9 )
ISSN:
年卷期: 2023 年 14 卷 2 期
页码:
收录情况: SCI
摘要: The RWP-RK is a small family of plant-specific transcription factors that are mainly involved in nitrate starvation responses, gametogenesis, and root nodulation. To date, the molecular mechanisms underpinning nitrate-regulated gene expression in many plant species have been extensively studied. However, the regulation of nodulation-specific NIN proteins during nodulation and rhizobial infection under nitrogen starvation in soybean still remain unclear. Here, we investigated the genome-wide identification of RWP-RK transcription factors and their essential role in nitrate-inducible and stress-responsive gene expression in soybean. In total, 28 RWP-RK genes were identified from the soybean genome, which were unevenly distributed on 20 chromosomes from 5 distinct groups during phylogeny classification. The conserved topology of RWP-RK protein motifs, cis-acting elements, and functional annotation has led to their potential as key regulators during plant growth, development, and diverse stress responses. The RNA-seq data revealed that the up-regulation of GmRWP-RK genes in the nodules indicated that these genes might play crucial roles during root nodulation in soybean. Furthermore, qRT-PCR analysis revealed that most GmRWP-RK genes under Phytophthora sojae infection and diverse environmental conditions (such as heat, nitrogen, and salt) were significantly induced, thus opening a new window of possibilities into their regulatory roles in adaptation mechanisms that allow soybean to tolerate biotic and abiotic stress. In addition, the dual luciferase assay indicated that GmRWP-RK1 and GmRWP-RK2 efficiently bind to the promoters of GmYUC2, GmSPL9, and GmNIN, highlighting their possible involvement in nodule formation. Together, our findings provide novel insights into the functional role of the RWP-RK family during defense responses and root nodulation in soybean.
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