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Comparative transcriptome analysis provides insights into ABA alleviating postharvest physiological deterioration of cassava

文献类型： 外文期刊

作者： Ye, Xiaoxue 1 ; Xing, Junchao 4 ; Tao, Xiangru 1 ; Yan, Yan 1 ; Li, Yu 5 ; Xie, Zhengnan 1 ; Yang, Jinghao 1 ; Zeng, Liwang 6 ; Wang, Yu 1 ; Li, Meiying 1 ; Wang, Ming 7 ; Fu, Naifang 7 ; Wan, Zhongqing 7 ; Kong, Hua 1 ; Ye, Jianqiu 7 ; Hu, Wei 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Sanya Res Inst, Coconut Res Inst,Natl Key Lab Trop Crop Breeding, Sanya 572024, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Hainan Key Lab Biosafety Monitoring & Mol Breeding, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Peoples R China

3.Chinese Acad Trop Agr Sci, Hainan Inst Trop Agr Resources, Hainan Key Lab Protect & Utilizat Trop Bioresource, Haikou 571101, Peoples R China

4.Northeast Forestry Univ, Coll Life Sci, Harbin 150040, Peoples R China

5.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Peoples R China

6.Chinese Acad Trop Agr Sci, Inst Sci & Tech Informat, Haikou 571101, Peoples R China

7.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 571101, Hainan, Peoples R China

关键词： Cassava; Postharvest physiological deterioration; Peroxidase; Transcription factor

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：5.7； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2025 年 222 卷

页码：

收录情况： SCI

摘要： Cassava, a staple crop in tropical regions, suffers from rapid postharvest physiological deterioration (PPD), limiting its shelf life. Although abscisic acid (ABA) has shown potential in alleviating PPD, the underlying regulatory pathways remain largely unexplored. In this study, physiological assays demonstrated that exogenous ABA alleviated PPD in cassava by decreasing H2O2 content. Temporal-resolution transcriptome analyses identified gene expression changes in cassava tuberous roots during PPD, with 1,338, 2,718, and 5543 genes differentially expressed after 6, 12, and 48 h of treatment, respectively. GO enrichment analysis revealed that ABA-induced DEGs exhibited functions such as response to oxygen radical, lignin metabolic process, and positive regulation of signal transduction. Co-expression network analysis identified three significant gene modules comprising 167 transcription factors (TFs) from 28 families, with 17 TFs predicted to regulate six key antioxidant enzyme genes through corresponding promoter motifs. The upregulated expression of these genes was subsequently validated by quantitative real-time PCR (qRT-PCR). Furthermore, yeast one-hybrid (Y1H) and dualluciferase assays provided direct evidences that MeMYB114 and MeHAT22 regulate the expression of MePOD10, while MeERF110, MeWRKY057, and MeHAT22 were shown to activate MePOD18 expression. These findings indicate that MeMYB114/MeHAT22/MeERF110/MeWRKY057-MePOD pathway is a crucial component involved in ABA-regulated PPD alleviation in cassava.

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