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Fan H, Shen X, Ding Y, Li Y, Liu S, Yang Y, Ding Y, Guan C. DkWRKY transcription factors enhance persimmon resistance to Colletotrichum horii by promoting lignin accumulation through DkCAD1 promotor interaction. Stress Biol 2024; 4:17. [PMID: 38407659 PMCID: PMC10897097 DOI: 10.1007/s44154-024-00154-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 01/31/2024] [Indexed: 02/27/2024]
Abstract
Persimmon anthracnose, a severe disease caused by the hemibiotrophic fungus Colletotrichum horii, poses a substantial threat to China's persimmon industry. Previous research showed that 'Kangbing Jianshi' cultivar exhibits strong resistance to anthracnose. Notably, 'Kangbing Jianshi' branches exhibit greater lignification compared with the susceptible 'Fuping Jianshi' cultivar. In this study, higher lignin content was observed in 'Kangbing Jianshi' compared with 'Fuping Jianshi', and this difference was associated with disease resistance. Transcriptome and metabolome analyses revealed that the majority of differentially expressed genes and differentially accumulated metabolites were primarily enriched in the phenylpropanoid biosynthesis and lignin synthesis pathways. Furthermore, significant upregulation of DkCAD1, a pivotal gene involved in lignin metabolism, was observed in the resistant cultivar when inoculated with C. horii. Transient overexpression of DkCAD1 substantially increased lignin content and improved resistance to C. horii in a susceptible cultivar. Furthermore, through yeast one-hybrid (Y1H) assays, we identified two WRKY transcription factors, DkWRKY8 and DkWRKY10, which interacts with the DkCAD1 promoter and induces its activity. Overexpression of DkWRKY8 and DkWRKY10 not only increased leaf lignin content but also enhanced persimmon tolerance to C. horii. Moreover, the expression levels of DkCAD1, DkWRKY8, and DkWRKY10 were significantly increased in response to salicylic acid and jasmonic acid in the resistant cultivar. These findings enhance our understanding of the molecular functions of DkWRKY8, DkWRKY10, and DkCAD1 in persimmons, as well as their involvement in molecular breeding processes in persimmons.
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Affiliation(s)
- Hanyue Fan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiaoxia Shen
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Yu Ding
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Yongkuan Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Shuyuan Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Yong Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Yuduan Ding
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China.
| | - Changfei Guan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China.
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Guan C, Wang M, Zhang Y, Ruan X, Zhang Q, Luo Z, Yang Y. DkWRKY interacts with pyruvate kinase gene DkPK1 and promotes natural deastringency in C-PCNA persimmon. Plant Sci 2020; 290:110285. [PMID: 31779905 DOI: 10.1016/j.plantsci.2019.110285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/04/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
PAs, also known as condensed tannins, cause the astringency sensation in the persimmon fruit. The astringency of Chinese pollination-constant non-astringent (C-PCNA) persimmon (Diospyros kaki Thunb.) can be naturally removed on the tree, but the regulatory mechanisms of deastringency remain to be elucidated. In our previous research, DkPK1 was shown to be involved in the natural loss of astringency of C-PCNA persimmon fruit. In the present study, yeast one-hybrid (Y1H) library screening using the DkPK1 promoter as baits identified two DkWRKY transcription factor genes (DkWRKY3 and -15). The transcript levels of both DkWRKY3 and -15 exhibited a positive correlation with the decrease in soluble proanthocyanidin (PA) content during the last developmental stage in C-PCNA persimmon. Multiple sequence analysis and subcellular localization confirmed that DkWRKY3 and -15 belonging to the group II and I families, respectively, were both located in the nucleus. Dual-luciferase and Y1H assays demonstrated that DkWRKY3 and -15 can transactivate the DkPK1 promoters. The combination of DkWRKY3 and -15 most likely produced an additive activation effect compared to a single activator on DkPK1, although the two transcriptional activators were not capable of interacting. Notably, DkWRKY3 and -15 showed ubiquitous expression in various organs and abundant upregulation in seeds. Furthermore, transient overexpression of both DkWRKY3 and -15 in persimmon leaves led to a significant decrease in the content of soluble PAs but a significant increase in the expression levels of the acetaldehyde metabolism-related DkPK, DkPDC and DkADH genes. Thus, we suggest that DkWRKY3 and -15 are the upstream regulators of DkPK1 and positively regulate the natural deastringency in C-PCNA persimmon.
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Affiliation(s)
- Changfei Guan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Mengke Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yangfan Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xiaofeng Ruan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Qinglin Zhang
- Key Laboratory of Horticultural Plant Biology (MOE), Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhengrong Luo
- Key Laboratory of Horticultural Plant Biology (MOE), Huazhong Agricultural University, Wuhan, 430070, China.
| | - Yong Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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