黄瓜MTP基因家族分析及重金属胁迫下表达特征
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湖北省教育厅科学技术研究项目(D20201301)


Analysis of MTP Gene Family and Expression Characteristics under Heavy Metal Stress in Cucumber
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    摘要:

    该研究以模式物种(拟南芥、水稻、玉米)的MTP序列作为种子序列,对黄瓜MTP基因家族(CsMTP)成员进行了系统鉴定和分析;并以Zn2+、Cd2+、Mn2+、Cu2+、Fe2+和Mo2+处理后的黄瓜叶片和根系为材料,对CsMTP响应金属离子的表达模式进行了研究,为探究该基因家族对黄瓜重金属胁迫调控机制提供理论依据。结果表明:(1)黄瓜含有10个CsMTP,可进一步分为Fe/ZnCDF(2个)、MnCDF(3个)和ZnCDF(5个)三个亚家族,MnCDF成员含有保守基序DxxxD,ZnCDF和Fe/ZnCDFs成员含有保守基序HxxxD,大部分CsMTP成员含有6个跨膜结构域。(2)RNAseq数据分析表明,CsMTP具备组织特异性表达和响应不同处理的特征,CsMTP11、CsMTP3和CsMTP7在不同组织和处理下普遍高水平表达,且外源化学试剂处理可诱导同一基因的不同表达模式。(3)RTPCR分析表明,CsMTPs可被不同重金属离子诱导差异表达,包括不是MTP家族潜在底物的重金属。

    Abstract:

    This study used the MTP sequence of model species as seed sequence to BLASTP the amino acid sequence database of cucumber, and then systematically analyzed the features of obtained CsMTP candidates. To analysis the expression pattern of CsMTPs, qRTPCR analysis were performed using cucumber leaf and root tissues treated by Zn2+, Cd2+, Mn2+, Cu2+, Fe2+ and Mo2+ stresses, which will provide theoretical basis for further studies related to the regulation mechanisms of CsMTPs in cucumber under heavy metal stresses. The results showed that 10 CsMTPs can be divided into Fe / ZnCDF (2) MnCDF (3) and ZnCDF subfamily (5), which were further named as CsMTP3 to CsMTP12 based on phylogenetic relationship. Most CsMTPs contain 6 transmembrane domains (TMD). CsMTP8, CsMTP9 and CsMTP11, which belong to MnCDF subgroup, contain the same sequence DxxxD, HxxxD motifs were observed in CsMTP3, 4, 5 and CsMTP7 of ZnMTP and Fe/Zn CDF subgroups. RNAseq analysis revealed that CsMTPs showed tissue and treatmentspecific expression patterns. CsMTP11, CsMTP3 and CsMTP7 maintained relatively higher expression level and exogenous chemical reagents can induce different expression patterns of the same gene. (3) qRTPCR study demonstrated that CsMTPs could be induced by the treatment of different metals, including metals that are not the potential substrate of MTP family.

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朱雄萌,蒋昕晨,席克勇,等.黄瓜MTP基因家族分析及重金属胁迫下表达特征[J].西北植物学报,2021,41(6):933-943

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  • 在线发布日期: 2021-07-20
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