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Investigates chitosan and epsilon-polylysine coating's effects on postharvest quality and disease resistance in Tremella fuciformis, indicating effective preservation.
Postharvest quality deterioration limits the commercial value of fresh Tremella fuciformis . This study investigated the effects of a chitosan (CTS) and ε-polylysine (ε-PL) composite coating on T. fuciformis stored at 25 °C. The treatment significantly inhibited respiration, maintained cell membrane integrity, and reduced the disease index. Biochemically, the coating acted as an exogenous elicitor, triggering early accumulation of hydrogen peroxide (H 2 O 2 ) and jasmonic acid (JA). This signaling cascade activated the phenylpropanoid pathway, enhancing key enzyme activities (C4H, 4CL, CAD, LAC) and promoting the synthesis of lignin and antimicrobial phenolic acids. Transcriptomics confirmed the upregulation of genes involved in phenylpropanoid biosynthesis, consistent with enzyme profiles. Thus, the CTS and ε-PL composite coating enhances disease resistance by regulating metabolic flux at the transcriptional level to reinforce physical and chemical barriers, offering an effective preservation strategy.
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Liu et al. (2026) studied this question.
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