Lysozyme inhibits postharvest physiological deterioration of cassava
- PMID: 35195347
- DOI: 10.1111/jipb.13219
Lysozyme inhibits postharvest physiological deterioration of cassava
Abstract
After harvest, cassava (Manihot esculenta Crantz) storage roots undergo rapid postharvest physiological deterioration, producing blue-brown discoloration in the vasculature due to the production of polyphenolics (mainly quinones and coumarins) by enzymes such as polyphenol oxidase (PPO). Here, we report the application of hen egg-white lysozyme (HEWL), a natural PPO inhibitor, in transgenic cassava to repress the symptoms of postharvest physiological deterioration. The HEWL-expressing transgenic plants had lower levels of the two main cassava coumarins tested, scopoletin and scopolin, compared with wild type. HEWL-expressing cassava also showed increased tolerance of oxidative stress. Overall, the lysozyme-PPO system proved to be functional in plants for repressing PPO-mediated commercial product browning.
Keywords: cassava; inhibitor; lysozyme; polyphenol oxidase; post-harvest physiological deterioration.
© 2022 Institute of Botany, Chinese Academy of Sciences.
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