玉米乙烯信号转导相关基因ZmEIL2的克隆及表达分析
作者:
作者单位:

甘肃省农业科学院作物研究所,兰州 730070

作者简介:

研究方向为农作物种质资源与分子育种,E-mail: lyue31@126.com

通讯作者:

祁旭升,研究方向为农作物种质资源挖掘与利用,E-mail: qixusheng6608@sina.com

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基金项目:

国家自然科学基金项目(31960431);甘肃省科技计划项目(20JR5RA109);甘肃省农业科学院农业科技创新专项(2020GAAS48)


Molecular Cloning and Expression Analysis of Ethylene Signaling Related Gene ZmEIL2 in Maize
Author:
Affiliation:

Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou 730070

Fund Project:

Foundation projects: The National Natural Science Foundation of China (31960431); Science and Technology Plan Project of Gansu Province(20JR5RA109); Agricultural Science and Technology Innovation Projects of Gansu Academy of Agricultural Sciences(2020GAAS48)

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    摘要:

    EIN3/EILs(Ethylene-insensitive proteins/ethylene-insensitive 3-like)家族蛋白是乙烯信号转导途径中的主要成员,在植物生长发育及胁迫响应中发挥着重要调控作用。本研究以玉米(Zea Mays L.)自交系B73为材料,从中分离了乙烯信号转导相关的ZmEIL2基因,并对其进行生物信息学、亚细胞定位及表达模式分析。结果表明,ZmEIL2基因的开放阅读框(ORF, open reading frame)全长1,788 bp,编码595个氨基酸残基,蛋白分子量为63.81 kD,理论等电点为6.34,保守结构域分析表明ZmEIL2基因具有EIN3/EILs家族所特有的EIN3结构域。系统进化分析表明ZmEIL2蛋白与高粱(Sorghum bicolor L.) SbEIL1蛋白亲缘关系最近,与拟南芥(Arabidopsis thaliana L.)和大豆(Glycine max (L.) Merr.)的EIL蛋白亲缘关系较远,且不同物种间存在明显的种属特性。亚细胞定位发现该基因同时定位于细胞膜和细胞核。组织特异性表达分析表明ZmEIL2基因在玉米苞叶中的表达量最高,其次为雌穗、雄穗和花丝,在穗位叶中的表达量最低。同时,ZmEIL2基因的表达受到脱水、PEG、ABA、高盐、高温和低温等非生物胁迫的显著诱导,其中对PEG、ABA、高盐的响应较为强烈,同时叶片中ZmEIL2基因的表达水平明显高于茎和根系。研究结果将为深入研究ZmEIL2基因响应逆境胁迫的分子机理奠定理论基础。

    Abstract:

    EIN3/EILs (Ethylene inductive proteins/ethylene inductive 3-like) protein family function as the main members of ethylene signal transduction pathway and play an important regulatory role in plant growth and development and stress response. In this study, ZmEIL2 was isolated from maize inbred line B73 based on sequence homology (GeneBank ID: KJ727458.1). This gene carries a 1788 bp coding sequence (CDS) that encodes for 595 amino acid residues with a relative molecular mass of 63.81 kD and a theoretical isoelectric point of 6.34. ZmEIL2 contains an EIN3 domain which is specific to EIN3/EILs family. Phylogenetic tree analysis showed that ZmEIL2 protein had the closest evolutionary relationship with SbEIL1 protein in Sorghum bicolor and was relatively distant from EIL proteins in Arabidopsis and soybean. The subcellular localization assay showed that ZmEIL2 protein was localized to the cell membrane and nucleus. Tissue specific expression analysis showed that ZmEIL2 gene was highly expressed in bract, followed by ear, tassel and silks, and the lowest expression was detected in mature leaves. The transcripts of ZmEIL2 gene were inducible under abiotic stresses treatments such as dehydration, PEG, ABA, high salt, heat and cold, particularly under PEG, ABA or high salt treatments. The expression level of ZmEIL2 gene in leaves was significantly higher than that in stems and roots. These results laid a theoretical foundation for further deciphering the molecular mechanism of ZmEIL2 gene in responses to abiotic stresses.

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引用本文

李玥,王兴荣,张彦军,等.玉米乙烯信号转导相关基因ZmEIL2的克隆及表达分析[J].植物遗传资源学报,2023,24(2):550-558.

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  • 收稿日期:2023-02-22
  • 最后修改日期:2022-10-27
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  • 在线发布日期: 2023-03-14
  • 出版日期: 2023-03-14
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