Identification of NPF Family Genes in Brassica rapa Reveal Their Potential Functions in Pollen Development and Response to Low Nitrate Stress
文献类型： 外文期刊
作者： Yang, Xiaoshuang 1 ; Han, Wenyu 1 ; Qi, Jiao 1 ; Li, Yueying 1 ; Chen, Xingbo 1 ; Zhang, Yiwen 1 ; Wu, Jingyu 1 ; Li, Genze 2 ; Gao, Jing 1 ; Dong, Xiangshu 1 ;
作者机构： 1.Yunnan Univ, Sch Agr, Kunming 650091, Peoples R China
2.Yunnan Acad Agr Sci, Ind Crop Res Inst, Kunming 650205, Peoples R China
关键词： Brassica rapa; NPF gene family; low nitrate stress; pollen development
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）
ISSN：
年卷期： 2023 年 24 卷 1 期
页码：
收录情况： SCI
摘要： Nitrate Transporter 1/Peptide Transporter Family (NPF) genes encode membrane transporters involved in the transport of diverse substrates. However, little is known about the diversity and functions of NPFs in Brassica rapa. In this study, 85 NPFs were identified in B. rapa (BrNPFs) which comprised eight subfamilies. Gene structure and conserved motif analysis suggested that BrNFPs were conserved throughout the genus. Stress and hormone-responsive cis-acting elements and transcription factor binding sites were identified in BrNPF promoters. Syntenic analysis suggested that tandem duplication contributed to the expansion of BrNPFs in B. rapa. Transcriptomic profiling analysis indicated that BrNPF2.6, BrNPF2.15, BrNPF7.6, and BrNPF8.9 were expressed in fertile floral buds, suggesting important roles in pollen development. Thirty-nine BrNPFs were responsive to low nitrate availability in shoots or roots. BrNPF2.10, BrNPF2.19, BrNPF2.3, BrNPF5.12, BrNPF5.16, BrNPF5.8, and BrNPF6.3 were only up-regulated in roots under low nitrate conditions, indicating that they play positive roles in nitrate absorption. Furthermore, many genes were identified in contrasting genotypes that responded to vernalization and clubroot disease. Our results increase understanding of BrNPFs as candidate genes for genetic improvement studies of B. rapa to promote low nitrate availability tolerance and for generating sterile male lines based on gene editing methods.
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