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草业学报 ›› 2024, Vol. 33 ›› Issue (1): 61-74.DOI: 10.11686/cyxb2023076

• 研究论文 • 上一篇    下一篇

盐生草根系基因HgAKR6C的克隆与初步功能分析

胡尚钦1,2(), 汪军成1,3, 姚立蓉1,3, 司二静1,3, 马小乐1,3, 杨轲1,3, 张宏1,3, 孟亚雄1,3, 王化俊1,3, 李葆春1,2()   

  1. 1.甘肃农业大学干旱生境作物学国家重点实验室,甘肃省作物遗传改良与种质创新重点实验室,甘肃 兰州 730070
    2.甘肃农业大学生命科学技术学院,甘肃 兰州 730070
    3.甘肃农业大学农学院,甘肃 兰州 730070
  • 收稿日期:2023-03-13 修回日期:2023-05-15 出版日期:2024-01-20 发布日期:2023-11-23
  • 通讯作者: 李葆春
  • 作者简介:E-mail: libc@gsau.edu.cn
    胡尚钦(1997-),女,安徽合肥人,在读硕士。E-mail: 441975748@qq.com
  • 基金资助:
    国家自然科学基金项目(31960072);财政部和农业农村部:国家现代农业产业技术体系项目(CARS-05-04B-2);甘肃省教育厅:产业支撑计划项目(2021CYZC-12);甘肃省自然基金项目(20JR10RA507);甘肃农业大学伏羲青年英才计划(Ganfx-03Y06);甘肃农业大学国家级大学生创新创业训练计划重点支持领域项目(202110733001)

Cloning and preliminary functional analysis of the root gene HgAKR6C of Halogeton glomeratus

Shang-qin HU1,2(), Jun-cheng WANG1,3, Li-rong YAO1,3, Er-jing SI1,3, Xiao-le MA1,3, Ke YANG1,3, Hong ZHANG1,3, Ya-xiong MENG1,3, Hua-jun WANG1,3, Bao-chun LI1,2()   

  1. 1.State Key Laboratory of Aridland Crop Science by Gansu Agricultural University,Gansu Key Laboratory of Crop Improvement and Germplasm Enhancement,Lanzhou 730070,China
    2.College of Life Sciences and Technology,Gansu Agricultural University,Lanzhou 730070,China
    3.College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China
  • Received:2023-03-13 Revised:2023-05-15 Online:2024-01-20 Published:2023-11-23
  • Contact: Bao-chun LI

摘要:

醛酮还原酶(AKR)是构成Shaker型K+通道蛋白的保守核心结构域,在植物应对非生物胁迫时起到关键作用。本研究采用西北旱区典型盐生植物盐生草作为研究材料,基于课题组前期盐生草根系盐胁迫转录组学数据分析结果,筛选并克隆得到耐盐基因HgAKR6CHgAKR6C基因蛋白质编码区(CDS)全长951 bp,共编码氨基酸317个。系统发育进化树分析表明,HgAKR6C与拟南芥中AtAKR6C1基因亲缘关系最近。亚细胞定位表明该基因可能主要定位于细胞质和细胞核中。qRT-PCR结果表明HgAKR6C在盐处理24 h时表达量达到峰值。构建酵母异源表达载体转化缺陷型菌株发现,HgAKR6C基因可能参与Na+的外排和介导K+的吸收。综上所述,HgAKR6C具有调节盐生草耐盐性的功能,而盐生草根系耐盐基因HgAKR6C的调控机制还需进一步的研究验证。

关键词: 盐生草, HgAKR6C, 基因克隆, 耐盐调控机制

Abstract:

Aldo-keto reductase (AKR) is a conserved core domain that constitutes Shaker family K+ channel protein and plays a key role in plant response to abiotic stress. In this research, Halogeton glomeratus, a halophyte found in the northwest of China, was studied. Based on the results of initial transcriptomic investigation, the salt tolerance gene HgAKR6C was selected and cloned. The total length of the coding sequence (CDS) region of HgAKR6C gene was 951 bp, encoding 317 amino acids. Phylogenetic tree analysis showed that HgAKR6C is closely related to AtAKR6C1 gene in Arabidopsis thaliana. An evaluation of subcellular localization suggests that the gene is primarily localized in the cytoplasm and nucleus. A qRT-PCR analysis of the root gene HgAKR6C showed that the peak expression was reached at 24 h of salt treatment. Construction of yeast heterologous expression vectors to transform defective strains revealed that the HgAKR6C gene may be involved in Na+ efflux and mediates K+ uptake. In summary, HgAKR6C has the function of regulating salt tolerance in H.glomeratus. The regulatory mechanism of the salt tolerance gene HgAKR6C in the roots of H. glomeratus needs to be further investigated and verified.

Key words: Halogeton glomeratus, HgAKR6C, gene cloning, salt tolerance regulatory mechanism