LED White Light Treatment Delays Postharvest Senescence of 'Zaosu' Pear Fruit with Inhibited Chlorophyll Degradation

文献类型： 外文期刊

第一作者： Mi, Hongbo

作者： Mi, Hongbo;Zhou, Xu;Yang, Jun;Chen, Jingxin;Liu, Bin

作者机构：

关键词： illumination; pear fruit; chlorophyll degradation; fruit senescence

期刊名称：HORTICULTURAE （ 影响因子：3.1； 五年影响因子：3.4 ）

ISSN：

年卷期： 2024 年 10 卷 1 期

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收录情况： SCI

摘要： To investigate the effects of LED white light treatment (LWT) on the storage quality of postharvest 'Zaosu' pears, as well as its role in maintaining fruit greenness and delaying senescence, pear fruits were treated with intermittent irradiation using LED white light for 12 h per day, with a light source distance of 30 +/- 1 cm and a photon flux density of 151 mu moL/(m2 center dot s) at 25 degrees C. The results showed that LWT preserved the postharvest quality of 'Zaosu' pear fruit by reducing weight loss and ascorbic acid degradation and promoting the ratio of sugar and organic acid. Meanwhile, LWT also substantially inhibited the respiration intensity and ethylene production during the storage process. Accordingly, the expressions of genes related to ethylene biosynthesis and signaling were reduced in LWT fruit. Notably, LWT retarded the decrease in chlorophyll content of fruit by increasing the activities of enzymes associated with chlorophyll synthase. Additionally, LWT also suppressed the chlorophyll degradation-related enzymes and their gene expressions in pear peel. These findings suggest that a moderate light irradiation can delay the de-green progress and benefit post-harvest storage of 'Zaosu' pear.

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