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Transcriptome Analysis Reveals the Dynamic and Rapid Transcriptional Reprogramming Involved in Heat Stress and Identification of Heat Response Genes in Rice

文献类型： 外文期刊

作者： He, Yonggang 1 ; Guan, Huimin 1 ; Li, Bo 1 ; Zhang, Shuo 1 ; Xu, Yanhao 1 ; Yao, Yan 1 ; Yang, Xiaolong 1 ; Zha, Zhongping 1 ; Guo, Ying 1 ; Jiao, Chunhai 1 ; Cai, Haiya 1 ;

作者机构： 1.Hubei Acad Agr Sci, Inst Food Crops, Wuhan 430070, Peoples R China

2.Hubei Key Lab Food Crop Germplasm & Genet Improvem, Wuhan 430070, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Crop Mol Breeding, Wuhan 430070, Peoples R China

关键词： rice (Oryza sativa L.); heat tolerance; transcriptome; DEGs; transcription factor

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2023 年 24 卷 19 期

页码：

收录情况： SCI

摘要： High temperature is one of the most important environmental factors influencing rice growth, development, and yield. Therefore, it is important to understand how rice plants cope with high temperatures. Herein, the heat tolerances of T2 (Jinxibai) and T21 (Taizhongxianxuan2hao) were evaluated at 45 degrees C, and T21 was found to be sensitive to heat stress at the seedling stage. Analysis of the H2O2 and proline content revealed that the accumulation rate of H2O2 was higher in T21, whereas the accumulation rate of proline was higher in T2 after heat treatment. Meanwhile, transcriptome analysis revealed that several pathways participated in the heat response, including "protein processing in endoplasmic reticulum", "plant hormone signal transduction", and "carbon metabolism". Additionally, our study also revealed that different pathways participate in heat stress responses upon prolonged stress. The pathway of "protein processing in endoplasmic reticulum" plays an important role in stress responses. We found that most genes involved in this pathway were upregulated and peaked at 0.5 or 1 h after heat treatment. Moreover, sixty transcription factors, including the members of the AP2/ERF, NAC, HSF, WRKY, and C2H2 families, were found to participate in the heat stress response. Many of them have also been reported to be involved in biotic or abiotic stresses. In addition, through PPI (protein-protein interactions) analysis, 22 genes were identified as key genes in the response to heat stress. This study improves our understanding of thermotolerance mechanisms in rice, and also lays a foundation for breeding thermotolerant cultivars via molecular breeding.

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