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Electron beam irradiation maintains postharvest quality of Actinidia arguta by regulating the cell wall, starch degradation, and antioxidant capacity

文献类型： 外文期刊

作者： Zheng, Qi 1 ; Tian, Wenhui 1 ; Wang, Shanshan 3 ; Chen, Zhijun 1 ; Wang, Haihong 1 ; Yue, Ling 1 ; Yan, Weiqiang 1 ; Qi, Wenyuan 1 ; Zhang, Ci 1 ; Xu, Xiaoyan 3 ; Kong, Qiulian 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, 1000 Jinqi Rd, Shanghai 201403, Peoples R China

2.Shanghai Acad Agr Sci, Shanghai Shuneng Irradiat Technol Co Ltd, 255 Maoyuan Rd, Shanghai 201403, Peoples R China

3.Chinese Acad Sci, Shanghai Inst Plant Physiol & Ecol, Core Facil Ctr, CAS Ctr Excellence Mol Plant Sci, 300 Feng Lin Rd, Shanghai 200032, Peoples R China

关键词： Actinidia arguta; Antioxidant capacity; Cell wall degradation; Electron beam irradiation; Fruit softening; Starch degradation

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：6.8； 五年影响因子：7.5 ）

ISSN： 0925-5214

年卷期： 2025 年 223 卷

页码：

收录情况： SCI

摘要： Rapid postharvest softening, a major issue with Actinidia arguta, leads to a decline in quality and in commercial value. To maximally preserve fruit quality, the effects of different doses of electron beam irradiation (0.4 kGy and 1 kGy) on fruit softening and the antioxidant capacity of A. arguta after 30 days of storage were investigated. The results indicated that, compared to unirradiated fruits, A. arguta fruit subjected to electron beam irradiation maintained high levels of firmness, total phenols, flavonoids, protopectin, starch, and sucrose, and exhibited low levels of malondialdehyde and reducing sugars. Fruit receiving 1 kGy irradiation exhibited the highest firmness; however, a significant reduction in firmness was observed immediately after irradiation (day 0). An irradiation dose of 0.4 kGy did not decrease fruit firmness, and there were no significant differences in the contents of protopectin, starch, sucrose, total phenols, and flavonoids compared to fruits treated with 1 kGy irradiation. A transcriptomic analysis revealed that electron beam irradiation significantly downregulated the most genes associated with the cell wall and starch degradation, and significantly upregulated some genes related to antioxidant activity. Furthermore, there was a positive correlation between the upregulated and downregulated gene expression levels and the radiation dose. The unigenes obtained from the transcriptomic analysis were validated through integrated RT-qPCR, proteomic, and transcriptomic correlation analyses. Overall, these findings indicated that electron beam irradiation is an effective method for delaying the softening of A. arguta.

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