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中国沙漠 ›› 2025, Vol. 45 ›› Issue (4): 343-356.DOI: 10.7522/j.issn.1000-694X.2025.00217

• • 上一篇    

科尔沁沙地典型植物对增温响应的基因差异表达

史尚彬1,2,3(), 黄文达1,2(), 于海伦1, 冯静1,2, 朱远忠1,2,3   

  1. 1.中国科学院西北生态环境资源研究院,干旱区生态安全与可持续发展全国重点实验室,甘肃 兰州 730000
    2.中国科学院西北生态环境资源研究院,奈曼沙漠化研究站,甘肃 兰州 730000
    3.中国科学院大学,北京 100049
  • 收稿日期:2025-05-06 修回日期:2025-07-08 出版日期:2025-07-20 发布日期:2025-08-18
  • 通讯作者: 黄文达
  • 作者简介:史尚彬(2001—),男,湖北恩施人,硕士研究生,研究方向为植物遗传学。E-mail: shishangbin@nieer.ac.cn
  • 基金资助:
    国家自然科学基金项目(41971144);干旱区生态安全与可持续发展全国重点实验室运行费项目(E451890201)

Differential gene expression response to warming of typical plants in the Horqin Sandy Land

Shangbin Shi1,2,3(), Wenda Huang1,2(), Hailun Yu1, Jing Feng1,2, Yuanzhong Zhu1,2,3   

  1. 1.State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands /, ?Northwest Institute of Eco-Environment and Resources,?Chinese Academy of Sciences,?Lanzhou 730000,?China
    2.Naiman Desertification Research Station, ?Northwest Institute of Eco-Environment and Resources,?Chinese Academy of Sciences,?Lanzhou 730000,?China
    3.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2025-05-06 Revised:2025-07-08 Online:2025-07-20 Published:2025-08-18
  • Contact: Wenda Huang

摘要:

本研究以科尔沁沙地沙地榆(Ulmus pumila var. sabulosa)、小叶杨(Populus simonii)、差不嘎蒿(Artemisia halodendron)、小叶锦鸡儿(Caragana microphylla)、狗尾草(Setaria viridis)、猪毛蒿(Artemisia scoparia)为对象,利用Illumina平台进行转录组测序,结合差异基因表达分析、加权基因共表达网络(WGCNA)及功能富集等方法,系统解析了不同生活型植物对增温胁迫的分子响应机制。结果表明:(1)MYB、AP2/ERF和GRAS转录因子家族在6种供试植物中主导了高温胁迫响应信号的调节,其中MYB基因在共表达网络中呈现高度关联性,可能通过调控抗氧化和胁迫响应基因协同应对高温。(2)乔木(如小叶杨)的基因表达变化较小,依赖结构适应性(如角质层增厚)缓解热胁迫,而灌木和草本则通过上调光合通路基因(如PetA)和激活茉莉酸信号通路适应环境波动。(3)光系统II核心蛋白PsbA在代表性乔灌草植物中均上调表达,但其基序排列和表达幅度存在差异,狗尾草独特的PsbA蛋白结构与其C4植物高光效特性相关。(4)茉莉酸信号通路在草本植物中显著激活,而乔木则以负调控为主,暗示生活型差异导致激素响应策略分化。

关键词: 科尔沁沙地, 转录组, 基因表达, 增温

Abstract:

This study focused on representative trees, shrubs and herbsin Horqin Sandy Land (Ulmus pumila var. sabulosaPopulus simoniiArtemisia halodendronCaragana microphyllaSetaria viridis, and Artemisia scoparia). Using transcriptome sequencing via the Illumina platform, combined with differential gene expression analysis, weighted gene co-expression network analysis (WGCNA), and functional enrichment methods, we systematically analyzed the molecular response mechanism of different plant life forms to elevated temperature stress. Key findings include: (1) The MYB, AP2/ERF, and GRAS transcription factor families dominate the regulation of heat stress response signals in six tested plants. MYB genes exhibited high connectivity in co-expression networks, potentially coordinating antioxidant and stress response genes to combat high temperatures. (2) Arbor species (e.g., Populus simonii) showed minimal gene expression changes, relying on structural adaptations (e.g., cuticle thickening) to mitigate heat stress, while shrubs and herbs upregulated photosynthetic pathway genes (e.g., PetA) and activated jasmonic acid signaling to adapt to environmental fluctuations. (3) The photosystem II core protein PsbA was upregulated in all species, yet there are differences in the motif arrangement and expression magnitude. The unique PsbA structure in Setaria viridis is correlate with its C4 plant photosynthetic efficiency. (4) Jasmonic acid signaling was prominently activated in herbs but negatively regulated in arbor species, suggesting life-form-driven divergence in hormonal response strategies.

Key words: Horqin Sandy Land, transcriptome, gene expression, warming

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