转录组分析发现拟南芥模式植物在铯胁迫下会激活热休克蛋白和ER胁迫反应

IF 1.7 4区 生物学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Plant Biotechnology Reports Pub Date : 2024-04-04 DOI:10.1007/s11816-024-00895-4
Dasom Choi, Dae Kwan Ko, Dong-Hwan Kim
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引用次数: 0

摘要

铯(Cs)毒性对植物的生长和发育具有有害影响。然而,人们对铯对植物毒性作用的分子机制还知之甚少。为了深入了解植物在铯胁迫下发生的分子事件,我们通过 RNA-seq 对对照植物和铯处理植物进行了转录组比较分析。我们确定了铯胁迫(1.5 mM CsCl)下的 183 个差异表达基因(141 个上调,42 个下调)。利用 Cs 胁迫下差异表达基因进行的基因本体(GO)分析表明,Cs 触发了植物胁迫信号通路,如活性氧(即过氧化氢)。进一步的 KEGG 和 MapMan 代谢通路分析表明,许多非生物/生物胁迫信号通路被高度诱导。特别是,热休克蛋白家族基因在受到 Cs 胁迫时被大量诱导。我们研究了几种热休克蛋白家族基因敲除突变体的根系生长情况,发现与野生型植物相比,这些突变体的热胁迫响应受到了影响。这表明,热休克蛋白基因(包括 HSP17s、HSP23s、HSP101 和 HSFA2 蛋白)在暴露于 Cs 时会被调配以提高植物的胁迫耐受性。我们的研究为了解 Cs 胁迫植物中发生的分子事件提供了新的视角。
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Transcriptome analysis revealed that Arabidopsis model plant invokes the activation of heat shock proteins and ER stress response against cesium stress

Cesium (Cs) toxicity has deleterious effects on plant growth and development. However, the molecular mechanism of the toxic effect of Cs on plants has been poorly understood. To obtain insights into the molecular events occurring in plants under Cs stress, we performed a comparative transcriptomic analysis between control and Cs-treated plants via RNA-seq. We identified 183 differentially expressed genes (141 upregulated and 42 downregulated) under Cs stress (1.5 mM CsCl). Gene ontology (GO) analysis using differentially expressed genes in Cs stress indicated that Cs triggered plant stress signaling pathways like reactive oxygen species (i.e., hydrogen peroxide). Further KEGG and MapMan metabolic pathway analyses revealed that many abiotic/biotic stress signaling pathways were highly induced. In particular, heat shock protein family genes were substantially induced upon exposure to Cs stress. We investigated the root growth of several knockout mutants of heat shock protein family genes and found that heat stress response was compromised in these mutants compared to wild type plants. It suggested that heat shock protein genes including HSP17s, HSP23s, HSP101, and HSFA2 proteins are deployed upon exposure to Cs for plant stress tolerance. Our study provided novel insights into the molecular events occurring in Cs-stressed plants.

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来源期刊
Plant Biotechnology Reports
Plant Biotechnology Reports 生物-生物工程与应用微生物
CiteScore
4.10
自引率
4.20%
发文量
72
审稿时长
>12 weeks
期刊介绍: Plant Biotechnology Reports publishes original, peer-reviewed articles dealing with all aspects of fundamental and applied research in the field of plant biotechnology, which includes molecular biology, genetics, biochemistry, cell and tissue culture, production of secondary metabolites, metabolic engineering, genomics, proteomics, and metabolomics. Plant Biotechnology Reports emphasizes studies on plants indigenous to the Asia-Pacific region and studies related to commercialization of plant biotechnology. Plant Biotechnology Reports does not exclude studies on lower plants including algae and cyanobacteria if studies are carried out within the aspects described above.
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