Exogenous melatonin treatment affects ascorbic acid metabolism in postharvest ‘Jinyan’ kiwifruit

Zhenyu Luo; Zhenyu Luo; Jieru Zhang; Jieru Zhang; Miaolian Xiang; Miaolian Xiang; Jiaoke Zeng; Jiaoke Zeng; Jinyin Chen; Jinyin Chen; Ming Chen; Ming Chen

doi:10.3389/fnut.2022.1081476

Frontiers in Nutrition (Dec 2022)

Exogenous melatonin treatment affects ascorbic acid metabolism in postharvest ‘Jinyan’ kiwifruit

Zhenyu Luo,
Zhenyu Luo,
Jieru Zhang,
Jieru Zhang,
Miaolian Xiang,
Miaolian Xiang,
Jiaoke Zeng,
Jiaoke Zeng,
Jinyin Chen,
Jinyin Chen,
Ming Chen,
Ming Chen

Affiliations

Zhenyu Luo: College of Agronomy, Jiangxi Agricultural University, Nanchang, China
Zhenyu Luo: Jiangxi Key Laboratory for Postharvest Technology and Non-destructive Testing of Fruits & Vegetables, Nanchang, China
Jieru Zhang: College of Agronomy, Jiangxi Agricultural University, Nanchang, China
Jieru Zhang: Jiangxi Key Laboratory for Postharvest Technology and Non-destructive Testing of Fruits & Vegetables, Nanchang, China
Miaolian Xiang: College of Agronomy, Jiangxi Agricultural University, Nanchang, China
Miaolian Xiang: Jiangxi Key Laboratory for Postharvest Technology and Non-destructive Testing of Fruits & Vegetables, Nanchang, China
Jiaoke Zeng: College of Agronomy, Jiangxi Agricultural University, Nanchang, China
Jiaoke Zeng: Jiangxi Key Laboratory for Postharvest Technology and Non-destructive Testing of Fruits & Vegetables, Nanchang, China
Jinyin Chen: College of Agronomy, Jiangxi Agricultural University, Nanchang, China
Jinyin Chen: Jiangxi Key Laboratory for Postharvest Technology and Non-destructive Testing of Fruits & Vegetables, Nanchang, China
Ming Chen: College of Agronomy, Jiangxi Agricultural University, Nanchang, China
Ming Chen: Jiangxi Key Laboratory for Postharvest Technology and Non-destructive Testing of Fruits & Vegetables, Nanchang, China

DOI: https://doi.org/10.3389/fnut.2022.1081476
Journal volume & issue: Vol. 9

Abstract

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Ascorbic acid (AsA) is an important nutritious substance in fruits, and it also can maintain the biological activity of fruits during storage. This research investigated the effect of exogenous melatonin (MT) on AsA metabolism in postharvest kiwifruit. Our results indicated that exogenous MT delayed the decrease of fruit firmness and titratable acid (TA), inhibited the increase of soluble solids content (SSC), reduced the respiration rate and ethylene production, and maintained a higher AsA content in kiwifruit during storage. The high expression of L-galactose pathway key genes in the early storage and regeneration genes in the later storage maintained the AsA content in postharvest kiwifruit. MT treatment enhanced the expression levels of AsA biosynthesis (AcGME2, AcGalDH, and AcGalLDH) and regeneration (AcGR, AcDHAR, and AcMDHAR1) genes. Meanwhile, the expression of the degradation gene AcAO was inhibited in MT-treated kiwifruits.

Published in Frontiers in Nutrition

ISSN: 2296-861X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology: Home economics: Nutrition. Foods and food supply
Website: https://www.frontiersin.org/journals/nutrition/

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