Genome-wide identification and expression analysis of NRAMP transporter genes in Cucumis sativus and Citrullus lanatus
文献类型： 外文期刊
作者： Zhang, Huanxin 1 ; Li, Guoquan 1 ; Cao, Na 1 ; Yang, Huidong 1 ; Zhu, Fanghong 1 ;
作者机构： 1.Jiangxi Acad Agr Sci, Inst Hort, Nanchang 330200, Peoples R China
关键词： Cucumis sativus; Citrullus lanatus; NRAMP; metal deficiency; metal toxicity
期刊名称：CANADIAN JOURNAL OF PLANT SCIENCE （ 影响因子：1.0； ）
ISSN： 0008-4220
年卷期： 2021 年 101 卷 3 期
页码：
收录情况： SCI
摘要： Natural resistance-associated macrophage proteins (NRAMPs) are able to transport various metal ions across cell membranes, which play an important role in plant growth and development. Here, a survey of cucumber (Cucumis sativus L.) and watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai] genomes found a total of five CsNRAMPs and four ClNRAMPs, respectively. Based on the phylogenetic relationships, CsNRAMPs and ClNRAMPs were clustered into three groups (I, II, and III). Five orthologous pairs were identified between cucumber and watermelon genome, and they were clustered on the same branch of the phylogenetic tree. The number of introns in CsNRAMPs and ClNRAMPs ranged from 3 to 13 and the genes from group I were more fragmented than those in group II. Subsequently, analysis of promoter sequences found that five putative transcription factors could act on NRAMPs. Moreover, CsNRAMPs and ClNRAMPs were differentially regulated by deficiencies of iron (Fe), manganese (Mn), copper (Cu), or zinc (Zn), along with toxicities of Fe, Mn, Cu, Zn, or cadmium (Cd). Functional analysis by heterologous expression in yeast indicated that CsNRAMP4 and ClNRAMP3 participate in Cd transport. Overall, the comprehensive analysis of CsNRAMPs and ClNRAMPs reported herein may pave the way for further investigations examining the regulation and functions of this gene family in cucumber and watermelon.
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