Journal
FOOD CHEMISTRY
Volume 337, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.127772
Keywords
Biotic stress; Botrytis cinerea; Chitosan; Jasmonic acid; Postharvest fruit; Transcriptional corepressor
Funding
- National Key Research and Development Program [2018YFD1000200]
- China National Natural Science Fund [31872938, 31872047]
- Jiangsu Excellent Youth Fund [BK20180076]
- China Fundamental Research Funds for the Central Universities [KYXJ202003]
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Chitosan plays a key role in plant resistance to Botrytis infection, inhibiting its growth and inducing defense-related genes in ripened fruits. It increases phenolic compounds, modulates oxidative stress, and induces JA production. Chitosan upregulates specific proteins and interactions, ultimately protecting fruit quality against Botrytis through JA signaling pathways.
Chitosan can function a key role in plant resistant against Botrytis cinerea infection, while its mechanism is unclear in ripened fruits. In this study, we investigated the chitosan effect on two type of ripened fruits including strawberry and grapes (Kyoho and Shine-Muscat) when were infected with B. cinerea. Results showed that chitosan inhibited B. cinerea growth, increased phenolic compounds and cell wall composition, modulated oxidative stress and induced jasmonic acid (JA) production in ripened fruits. Data-independent acquisition (DIA) showed that 224 and 171 proteins were upregulated 1.5-fold by chitosan in Kyoho and Shine-Muscat grape, respectively. Topless-related protein 3 (TPR3) were identified and interacted with histone deacetylase 19 (HDAC19) and negatively regulated by JA and chitosan. Meanwhile, overexpression of VvTPR3 and VvHDAC19 reduced the stability of cell wall against B. cinerea in strawberry. Taken together, chitosan induces defense related genes and protect the fruit quality against Botrytis infection through JA signaling.
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