Effects of heat treatment on the quality and storage life of sweet potato

Hu, Wenzhong; Tanaka, Shun–ichiro

doi:10.1002/jsfa.2724

Cited by 9 publications

References 11 publications

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Physiological changes and molecular regulation in sweetpotato responses to low‐temperature stress

Mu,

Zheng,

Zhao

et al. 2024

Crop Science

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Sweetpotato (Ipomoea batatas [L.] Lam) is highly adaptable to different soils and climates, but it is more sensitive to cold due to its tropical origin. Low‐temperature stress is a key factor affecting storage and has a significant impact on sweetpotato quality. During sweetpotato storage, prolonged exposure to low temperatures causes chilling damage to the root system, altering its physiological functions. This is manifested by wilting of the tuberous roots, nutrient loss, and reduced antioxidant enzyme activity. At the same time, it leads to a significant downregulation of genes associated with cold signaling pathways. Understanding the physiological and molecular mechanisms of sweetpotato's response to low‐temperature stress, which is crucial for improving its quality during storage. In addition, methods such as high‐voltage alternating electric field, controlled atmosphere, hot water treatment, and hot air treatment can better preserve the nutrients of sweetpotato and maintain their high commercial quality during low‐temperature storage. This article reviews and summarizes key studies on the nutrient and physiological changes, as well as the molecular regulatory mechanisms of sweetpotato during low‐temperature storage, and identifies unresolved questions in this field. It provides insights for further research on low‐temperature stress in sweetpotato.

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Physiological changes and molecular regulation in sweetpotato responses to low‐temperature stress

Mu,

Zheng,

Zhao

et al. 2024

Crop Science

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Postharvest benzothiazole treatment enhances healing in mechanically damaged sweet potato by activating the phenylpropanoid metabolism

et al. 2020

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BACKGROUNDSweet potato often suffers mechanical damage during harvest, handling, and transportation. Infections, water loss, and quality changes of sweet potato caused by mechanical damage pose great financial losses. Wound healing is an effective method to alleviate such problems. In this study, the effects of postharvest treatment with benzothiazole (BTH) on wound healing of sweet potato was investigated.RESULTSPostharvest BTH treatment of sweet potatoes promoted lignin accumulation in wounded tissues, and 100 mg L−1 BTH exhibited better effects than 50 mg L−1 or 150 mg L−1 BTH. The biosynthesis of lignin in wounded tissues significantly decreased the weight loss of sweet potatoes. An increase in respiration intensity after BTH treatment was observed. The total phenolic and flavonoid contents and the activity of phenylalanine ammonia‐lyase, peroxidase, and polyphenol oxidase were increased in BTH‐treated sweet potatoes. This suggests that BTH increases phenylpropanoid metabolism.CONCLUSIONPostharvest 100 mg L−1 BTH treatment could promote wound healing in mechanically damaged sweet potatoes. The activation of the phenylpropanoid metabolism might be the mechanism of action of BTH in wound healing. © 2020 Society of Chemical Industry

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