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Ma Q, Li D, Ren Y, Chen Y, Huang J, Wu B, Wang Q, Luo Z. Transient autophagy inhibition strengthened postharvest tomato (Solanum lycopersicum) resistance against Botrytis cinerea through curtailing ROS-induced programmed cell death. Food Chem 2024; 454:139811. [PMID: 38820631 DOI: 10.1016/j.foodchem.2024.139811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/17/2024] [Accepted: 05/22/2024] [Indexed: 06/02/2024]
Abstract
Autophagy (AU) and programmed cell death (PCD) are dynamically regulated during tomato fruit defense against Botrytis cinerea, which are also manipulated by pathogenic effectors to promote colonization. Present study demonstrated that the enhanced defense induced by transient inhibition on AU by hydroxychloroquine (HCQ) facilitated the restriction of B. cinerea lesion on postharvest tomato. Pre-treatment of 2 mM (16.08 ± 3.42 cm at 7 d) and 6 mM (7.80 ± 2.39 cm at 7 d) HCQ inhibited the lesion development of B. cinerea compared with Mock treatment (50.02 ± 7.69 cm at 7 d). Transient inhibition of AU induced expression of fungal defense and transcriptional regulation related genes, but attenuated reactive oxygen species (ROS) burst gene expression. The ROS-induced PCD was compromised by HCQ with promoted ROS scavenging. The transient pre-treatment of HCQ slightly inhibited AU which triggered the feedback loop that enhanced the autophagic activity defensing against B. cinerea infection.
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Affiliation(s)
- Quan Ma
- Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
| | - Dong Li
- Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China.
| | - Yicheng Ren
- Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
| | - Yanpei Chen
- Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
| | - Jing Huang
- Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
| | - Bin Wu
- Institute of Agro-products Storage and Processing & Xinjiang Key Laboratory of Processing and Preservation of Agricultural Products, Xinjiang Academy of Agricultural Science, Urumqi 830091, China
| | - Qingqing Wang
- Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
| | - Zisheng Luo
- Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agri-Food Processing, Zhejiang University, Hangzhou 310058, China; Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China.
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Chen Y, Li D, Xu Y, Lu Z, Luo Z. 5-Azacytidine accelerates mandarin fruit post-ripening and enhances lignin-based pathogen defense through remarkable gene expression activation. Food Chem 2024; 458:140261. [PMID: 38964094 DOI: 10.1016/j.foodchem.2024.140261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/11/2024] [Accepted: 06/26/2024] [Indexed: 07/06/2024]
Abstract
5-Azacytidine (AZ) is a DNA methylation inhibitor that has recently demonstrated potential in regulating fruit quality through exogenous application. In this study, we treated mandarin fruits for 4-day storage. Noteworthy were the induced degreening and the enhanced citrus aroma of fruits under AZ treatment, involving the promotion of chlorophyll degradation, carotenoid biosynthesis, and limonene biosynthesis. Key genes associated with these processes exhibited expression level increases of up to 123.8 times. Additionally, AZ treatment activated defense-related enzymes and altered phenylpropanoid carbon allocation towards lignin biosynthesis instead of flavonoid biosynthesis. The expression levels of lignin biosynthesis-related genes increased by nearly 100 times, leading to fortified lignin that is crucial for citrus defense against Penicillium italicum. Currently, the underlying mechanisms of such intense AZ-induced changes in gene expressions remain unclear and further research could help establish AZ treatment as a viable strategy for citrus preservation.
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Affiliation(s)
- Yanpei Chen
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, People's Republic of China
| | - Dong Li
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, People's Republic of China
| | - Yanqun Xu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, People's Republic of China; Ningbo Innovation Center, Zhejiang University, Ningbo, People's Republic of China
| | - Zhanjun Lu
- College of Life Sciences, Gannan Normal University, Ganzhou, People's Republic of China.
| | - Zisheng Luo
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, People's Republic of China; Ningbo Innovation Center, Zhejiang University, Ningbo, People's Republic of China; National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agri-Food Processing, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang University, Hangzhou, People's Republic of China.
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Ma X, Jiang N, Fu J, Li Y, Zhou L, Yuan L, Wang Y, Li Y. A cytosine analogue 5-azacitidine improves the accumulation of licochalcone A in licorice Glycyrrhiza inflata. JOURNAL OF PLANT PHYSIOLOGY 2024; 292:154145. [PMID: 38091890 DOI: 10.1016/j.jplph.2023.154145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 02/10/2024]
Abstract
Licochalcone A (LCA) is a characteristic compound of Glycyrrhiza inflata with anti-inflammatory, antioxidant and antitumor activities. However, G. inflata produces LCA in low quantities that does not meet the market demand. In this study, we found that DNA methylation inhibitor 5-azacitidine (5-azaC) successfully improved the LCA contents in G. inflata seedlings. Transcriptome analysis revealed a series of differentially expressed genes (DEGs), including transcription factors such as MYB, ERF, WRKY, and some structural genes related to flavonoid biosynthesis. However, whole genome bisulfite sequencing (BS-seq) results showed little effect of the 5-azaC treatment on the alteration of DNA methylation on these genes, indicating the possibility that 5-azaC acts as a stimulus, but not an epigenetic modulation factor to improve the LCA content in G. inflata. Additionally, we applied the 5-azaC treatment to field plants and hairy roots and successfully increased the LCA contents in both cases. This research demonstrates the feasibility of 5-azaC treatments in future applications to improve plant production of LCA.
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Affiliation(s)
- Xiaoling Ma
- Guangdong Provincial Key Laboratory of Applied Botany & Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ningxin Jiang
- Guangdong Provincial Key Laboratory of Applied Botany & Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingxian Fu
- Guangdong Provincial Key Laboratory of Applied Botany & Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuping Li
- Guangdong Provincial Key Laboratory of Applied Botany & Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lijun Zhou
- Guangdong Provincial Key Laboratory of Applied Botany & Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ling Yuan
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546, USA
| | - Ying Wang
- Guangdong Provincial Key Laboratory of Applied Botany & Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yongqing Li
- Guangdong Provincial Key Laboratory of Applied Botany & Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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