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Genome-wide identification and evolutionary analysis of the NRAMP gene family in the AC genomes of Brassica species

文献类型： 外文期刊

作者： Zhao, Yuquan 1 ; Xie, Qijun 2 ; Yang, Qian 2 ; Cui, Jiamin 1 ; Tan, Wenqing 2 ; Zhang, Dawei 1 ; Xiang, Jianhua 1 ; Deng, Lichao 2 ; Guo, Yiming 2 ; Li, Mei 2 ; Liu, Lili 1 ; Yan, Mingli 2 ;

作者机构： 1.Hunan Univ Sci & Technol, Sch Life & Hlth Sci, Hunan Key Lab Econ Crops Genet Improvement & Integ, Xiangtan 411201, Peoples R China

2.Yuelushan Lab, Hongqi Rd, Changsha 410125, Peoples R China

3.Hunan Acad Agr Sci, Crop Res Inst, Changsha 410125, Peoples R China

4.Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China

5.Hunan Acad Agr Sci, Hunan Engn & Technol Res Ctr Hybrid Rapeseed, Changsha 410125, Peoples R China

关键词： Brassica napus; Brassica species; Bioinformatics; Cadmium; Subfamily; Motifs; Cis-acting element

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.3； 五年影响因子：5.9 ）

ISSN： 1471-2229

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Background Brassica napus, a hybrid resulting from the crossing of Brassica rapa and Brassica oleracea, is one of the most important oil crops. Despite its significance, B. napus productivity faces substantial challenges due to heavy metal stress, especially in response to cadmium (Cd), which poses a significant threat among heavy metals. Natural resistance-associated macrophage proteins (NRAMPs) play pivotal roles in Cd uptake and transport within plants. However, our understanding of the role of BnNRAMPs in B. napus is limited. Thus, this study aimed to conduct genome-wide identification and bioinformatics analysis of three Brassica species: B. napus, B. rapa, and B. oleracea. Results A total of 37 NRAMPs were identified across the three Brassica species and classified into two distinct subfamilies based on evolutionary relationships. Conservative motif analysis revealed that motif 6 and motif 8 might significantly contribute to the differentiation between subfamily I and subfamily II within Brassica species. Evolutionary analyses and chromosome mapping revealed a reduction in the NRAMP gene family during B. napus evolutionary history, resulting in the loss of an orthologous gene derived from BoNRAMP3.2. Cis-acting element analysis suggested potential regulation of the NRAMP gene family by specific plant hormones, such as abscisic acid (ABA) and methyl jasmonate (MeJA). However, gene expression pattern analyses under hormonal or stress treatments indicated limited responsiveness of the NRAMP gene family to these treatments, warranting further experimental validation. Under Cd stress in B. napus, expression pattern analysis of the NRAMP gene family revealed a decrease in the expression levels of most BnNRAMP genes with increasing Cd concentrations. Notably, BnNRAMP5.1/5.2 exhibited a unique response pattern, being stimulated at low Cd concentrations and inhibited at high Cd concentrations, suggesting potential response mechanisms distinct from those of other NRAMP genes. Conclusions In summary, this study indicates complex molecular dynamics within the NRAMP gene family under Cd stress, suggesting potential applications in enhancing plant resilience, particularly against Cd. The findings also offer valuable insights for further understanding the functionality and regulatory mechanisms of the NRAMP gene family.

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