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Physiological, Epigenetic, and Transcriptome Analyses Provide Insights into the Responses of Wheat Seedling Leaves to Different Water Depths under Flooding Conditions

文献类型： 外文期刊

作者： Li, Bo 1 ; Hua, Wei 3 ; Zhang, Shuo 1 ; Xu, Le 4 ; Yang, Caixian 4 ; Zhu, Zhanwang 1 ; Guo, Ying 1 ; Zhou, Meixue 5 ; Jiao, Chunhai 1 ; Xu, Yanhao 1 ; Komatsu, Setsuko 1 ;

作者机构： 1.Hubei Acad Agr Sci, Minist Agr & Rural Affairs, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improvem, Wuhan 430064, Peoples R China

2.Hubei Acad Agr Sci, Minist Agr & Rural Affairs, Food Crops Inst, Key Lab Crop Mol Breeding, Wuhan 430064, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310021, Peoples R China

4.Yangtze Univ, Coll Agr, Hubei Collaborat Innovat Ctr Industrializat Major, Jingzhou 434025, Peoples R China

5.Univ Tasmania, Tasmanian Inst Agr, Newnham Dr, Launceston, Tas 7250, Australia

关键词： Triticum aestivum L.; DNA methylation; transcriptional analysis; water depth; flooding stress

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 23 期

页码：

收录情况： SCI

摘要： Flooding stress, including waterlogging and submergence, is one of the major abiotic stresses that seriously affects the growth and development of plants. In the present study, physiological, epigenetic, and transcriptomic analyses were performed in wheat seedling leaves under waterlogging (WL), half submergence (HS), and full submergence (FS) treatments. The results demonstrate that FS increased the leaves' hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents and reduced their chlorophyll contents (SPAD), photosynthetic efficiency (F-v/F-m), and shoot dry weight more than HS and WL. In addition, FS increased catalase (CAT) and peroxidase (POD) activities more than HS and WL. However, there were no significant differences in the contents of H2O2, MDA, SPAD, and F-v/F-m, and the activities of superoxide dismutase (SOD) and POD between the HS and WL treatments. The changes in DNA methylation were related to stress types, increasing under the WL and HS treatments and decreasing under the FS treatment. Additionally, a total of 9996, 10,619, and 24,949 genes were differentially expressed under the WL, HS, and FS treatments, respectively, among which the 'photosynthesis', 'phenylpropanoid biosynthesis', and 'plant hormone signal transduction' pathways were extensively enriched under the three flooding treatments. The genes involved in these pathways showed flooding-type-specific expression. Moreover, flooding-type-specific responses were observed in the three conditions, including the enrichment of specific TFs and response pathways. These results will contribute to a better understanding of the molecular mechanisms underlying the responses of wheat seedling leaves to flooding stress and provide valuable genetic and epigenetic information for breeding flood-tolerant varieties of wheat.

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