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园艺学报 ›› 2025, Vol. 52 ›› Issue (7): 1745-1757.doi: 10.16420/j.issn.0513-353x.2024-0723

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

马铃薯低温胁迫相关基因StHY5的功能分析

窦雪婷1, 朱熙2,3, 张宁1,*(), 司怀军1   

  1. 1 甘肃农业大学生命科学技术学院,省部共建干旱生境作物学国家重点实验室,兰州 730070
    2 中国热带农业科学院南亚热带作物研究所,农业农村部热带果树生物学重点实验室/海南省热带园艺采后处理与保鲜重点实验室,广东湛江 524091
    3 中国热带农业科学院三亚研究院,热带作物生物育种全国重点实验室,海南三亚 572024
  • 收稿日期:2024-11-12 修回日期:2025-04-22 出版日期:2025-07-23 发布日期:2025-07-23
  • 通讯作者:
  • 基金资助:
    甘肃省科技重大专项计划项目(23ZDNA006); 国家重点研发计划项目(2022YFD1602103)

Functional Analysis of StHY5 Associated with Low-Temperature Stress in Potato

DOU Xueting1, ZHU Xi2,3, ZHANG Ning1,*(), and SI Huaijun1   

  1. 1 State Key Laboratory of Aridland Crop Science,College of Life Science and Technology,Gansu Agricultural University,Lanzhou 730070,China
    2 Key Laboratory of Tropical Fruit Biology,Ministry of Agriculture and Rural Affairs/Hainan Provincial Key Laboratory of Tropical Horticulture Postharvest Treatment and Preservation,Institute of South Subtropical Crops,Chinese Academy of Tropical Agricultural Sciences,Zhanjiang,Guangdong 524091,China
    3 National Key Laboratory of Biological Breeding of Tropical Crops,Sanya Research Institute,Chinese Academy of Tropical Agricultural Sciences,Sanya,Hainan 572024,China
  • Received:2024-11-12 Revised:2025-04-22 Published:2025-07-23 Online:2025-07-23

摘要: HY5是属于bZIP类的转录因子,参与调控植物光响应及逆境胁迫。以马铃薯栽培品种‘大西洋’为试验材料,分析StHY5基因及其编码蛋白的功能,并进行亚细胞定位分析。qRT-PCR分析StHY5在4 ℃低温胁迫下的表达模式,构建StHY5的过表达和干扰表达载体,通过遗传转化技术获得马铃薯转基因植株,分析4 ℃低温处理下活性氧相关物质的变化。结果显示:StHY5基因编码区长477 bp,编码了158个氨基酸,定位于细胞核,属于不稳定亲水性蛋白,且无信号肽和跨膜结构,在不同物种中进化较保守,与野生番茄、窄刀薯的亲缘关系较近。StHY5蛋白与10个蛋白存在互作,包括1个光敏色素A,2个B-box蛋白和3个组蛋白脱乙酰酶。StHY5基因启动子区含有光响应元件和激素响应相关元件。qRT-PCR结果表明,低温胁迫可诱导StHY5基因表达量上调。低温处理后,StHY5基因过表达植株的超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性和脯氨酸(Pro)含量较野生型植株显著升高,丙二醛(MDA)含量较野生型植株显著降低;StHY5基因干扰表达植株则反之。

关键词: 马铃薯, StHY5基因, 低温, 生物信息分析, 遗传转化

Abstract:

HY5 is a class of bZIP transcription factor. HY5 is involved in regulating plant light response and abiotic stress. In this study,the functions of the StHY5 and its encoded protein were analyzed,and the subcellular localization was observed using potato cultivar‘Atlantic’as the experimental material. The expression pattern of StHY5 gene was analyzed under 4 ℃ low-temperature stress by qRT-PCR method. The overexpression and interference expression vectors of StHY5 gene were constructed,and obtained transgenic potato plants through genetic transformation technology. The changes of reactive oxygen species under 4 ℃ low-temperature treatment. The results showed that the coding sequence of StHY5 gene was 477 bp,encoding 158 amino acids. StHY5 protein was located in the nucleus,and it belonged to unstable hydrophilic proteins,without signal peptide and transmembrane structure. It had conserved evolutionary among different species,and had the highest evolutionary relationship with wild tomato and Solanum stenotomum. StHY5 protein was closely related to 10 proteins interaction,including 1 photosensitive pigment A,2 B-box proteins,and 3 histone deacetylases. There were cis-acting elements involved in light-responsive and hormone-responsive in the promoter region of StHY5 gene. The qRT-PCR results showed that StHY5 gene was consistently up-regulated in expression during low-temperature. The superoxide dismutase(SOD),peroxidase(POD),catalase(CAT)activities and proline(Pro)content of StHY5 gene overexpression plants were significantly higher and the malondialdehyde(MDA)content was significantly lower than wild type plants under low-temperature treatment. However,StHY5 gene interference expression plants was reversed under low-temperature treatment.

Key words: potato, StHY5, low temperature, bioinformatics analysis, genetic transformation