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Red LED irradiation maintains the postharvest quality of broccoli by elevating antioxidant enzyme activity and reducing the expression of senescence-related genes

文献类型： 外文期刊

作者： Jiang, Aili 1 ; Zuo, Jinhua 2 ; Zheng, Qiuli 2 ; Guo, Lei 2 ; Gao, Lipu 2 ; Zhao, Shugang 2 ; Wang, Qing 2 ; Hu, Wenzhong 1 ;

作者机构： 1.Dalian Minzu Univ, Minist Educ, Coll Life Sci, Key Lab Biotechnol & Bioresources Utilizat, Dalian 116600, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Key Lab Biol & Genet Improvement Hort Crops North, Beijing Vegetable Res Ctr,Key Lab Urban Agr North, Minist Agr,Minist Agr & Rural Affairs,Key Lab Veg, Beijing, Peoples R China

关键词： Broccoli; Sensory quality; Antioxidant enzymes; Gene expression

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2019 年 251 卷

页码：

收录情况： SCI

摘要： The quality of broccoli stored at ambient temperatures deteriorates rapidly as tissues begin to senesce. The effect of red light-emitting-diode (LED) light irradiation (50 mu mol m(-2)s(-1)) on the quality of harvested broccoli stored at 20 degrees C for 5 d was investigated. Sensory quality and physiological function, including the activity of antioxidant enzymes and the expression of genes associated with chlorophyll degradation, were analyzed. Results indicated that red LED irradiation maintained the sensory appearance of broccoli, inhibited yellowing and the degradation of chlorophyll, and decreased weight loss and malondialdehyde (MDA) content. The activity of the antioxidant enzymes, peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX) were enhanced in LED-treated broccoli, while the expression of the chlorophyll degrading genes, chlorophyllase II (BoCLH2), chlorophyllase III (BoCLH3), and pheophorbide a oxygenase (BoPAO) was suppressed in the early stages of storage. In contrast, no effect on chlorophyllase I (BoCLH1) was observed. These results demonstrated that irradiation of broccoli with red LED induced a series of physiological and molecular responses that extended postharvest quality and could be used to prolong the shelf-life of commercially produced broccoli.

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