Biocontrol yeast T‐2 improves the postharvest disease resistance of grape by stimulation of the antioxidant system. Issue 10 (30th May 2022)

• Record Type: Journal Article
• Authors: Wu, Chenyang; Wang, Yuci; Ai, Dan; Li, Zhuoran; Wang, Yuanhong
• Is Part Of: Food science & nutrition. Volume 10:Issue 10(2022)
• Page Start: 3219
• Page End: 3229
• Publication Date: 2022-05-30
• Subjects: antioxidant -- biocontrol yeast -- grape berries -- lipid peroxidation -- postharvest resistance -- Total phenolics; Food industry and trade -- Periodicals; Food -- Periodicals; Nutrition -- Periodicals; 664
• DOI: 10.1002/fsn3.2940
• Languages: English
• ISSNs: 2048-7177

Abstract

Abstract: Table grapes are susceptible to external pathogens during postharvest storage. The resulting continuous oxidative stress causes damage and aging, thereby reducing the defense against disease. In this study, the effect of biocontrol yeast T‐2 on the storage performance of grapes was evaluated. After T‐2 treatment, the grapefruits rot rate and lesion diameter caused by Botrytis cinerea (B. cinerea) were significantly decreased at 2–5 days after inoculation (DAI). Additionally, the browning rate and shedding rate of grapefruit during storage were significantly reduced at 2–5 DAI, and the weight loss rate was significantly reduced at 3–5 DAI. The decreased malondialdehyde (MDA) content in grapefruits at 1–5 DAI with T‐2 indicated a reduction in oxidative damage. Furthermore, the activities of antioxidant enzymes such as peroxidase (POD), catalase (CAT), phenylalanin ammonia‐lyase (PAL) were significantly increased during most storage time after being treated with T‐2. Moreover, the contents of total phenolics and flavonoids and the expression levels of key enzyme genes in metabolic pathways were increased after T‐2 treatment during most postharvest storage time, providing evidence that T‐2 changed the biological process of phenolic flavonoid metabolism. The increase in enzymatic and nonenzymatic antioxidants after treatment with T‐2 reflected the strengthening of the antioxidant system, hence postponing fruit senescence and promoting storage performance under the stress of B. cinerea . Abstract : The effect of biocontrol yeast T‐2 on the postharvest quality and storage performance of grape fruits was tested. The treatment by T‐2 can enhanced the grape fruits resistance to Botrytis cinerea, decreased the grape rachis browning index, grape clusters weight loss. T‐2 treatment led to a lower malondialdehyde content and higher activities of antioxidant enzymes. T‐2 treatment increased the content of total phenolics and flavonoids and the expression levels of key genes in related metabolic pathways in grape fruits.