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Recent advances and current status of heat treatment in fruit biocontrol system(host fruit-fungal pathogen-biocontrol agent)

Huizhen Chen;Jia Liu

  Eco-friendly approach like heat treatment and biological control utilizing antagonistic yeasts to manage postharvest diseases of fruits is a research topic that has been drawing considerable attention.The current review focuses on the effects of heat treatment on not only fruit commodities,but also fungal pathogen and biocontrol yeasts at molecular and physiological levels.The effects of postharvest heat treatment on aspects of defense response in fruit,by biochemical,transcriptional,proteomics and metabolic analysis,are discussed.Pathogenesis-related proteins,antioxidant enzymes,heat shock proteins,novel genes and antifungal compounds involved in the metabolism in response to heat are dealt with.On the other hand,heat treatment exhibits the direct inhibitory effect on fungal pathogens,and the modes of action like transcriptional regulation,oxidative injury and ATP consumption on pathogens have been proposed.More recently,mild heat stress adaptation in antagonistic yeasts to induce cross-protection against various stresses and enhance their biocontrol efficacy,are highlighted.An integrated management will more likely provide a viable alternative to synergetic fungicides for postharvest diseases,compared to a single approach.Combing a heat treatment of fruit hosts with biocontrol yeasts has shown enhanced control efficacy against postharvest diseases in various fruits.This review provides an overview of recent advances of heat treatment in postharvest system(host fruit-fungal pathogen-biocontrol agent),with specific emphasis on each component.It systematically contributes to a comprehensive understanding of the action mode of heat treatment,which is beneficial for guidance of further application.……