Low intensity white light-emitting diodes (LED) application to delay senescence and maintain quality of postharvest pakchoi (Brassica campestris L. ssp. chinensis (L.) Makino var. communis Tsen et Lee)
文献类型： 外文期刊
作者： Zhou, Fuhui 1 ; Zuo, Jinhua 1 ; Xu, Dongying 2 ; Gao, Lipu 1 ; Wang, Qing 1 ; Jiang, Aili 2 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Key Lab Biol & Genet Improvement Hort Crops Nort, Beijing Key Lab Fruits & Vegetable Storage & Proc, Minist Agr,Natl Engn Res Ctr Vegetables,Key Lab U, Beijing 100097, Peoples R China
2.Minist Educ, Key Lab Biotechnol & Bioresources Utilizat, Dalian 116600, Peoples R China
3.Dalian Minzu Univ, Coll Life Sci, Dalian 116600, Peoples R China
关键词： White LED light; Antioxidant enzyme; Chlorophyll metabolism; 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： 2020 年 262 卷
页码：
收录情况： SCI
摘要： In this study, the effect of white LED irradiation on quality, antioxidant, chlorophyll-related enzyme activity and gene expression were evaluated in pakchoi. Results indicated that white LED irradiation (10 mu mol m(-2)s(-1)) significantly suppressed the changes in sensory evaluation, respiration rate, and malondialdehyde content, and also maintained higher chlorophyll and vitamin C content in harvested pakchoi stored at 20 degrees C. Furthermore, LED treatment maintained the levels of gene expression and enzyme activity of peroxidase, catalase, and ascorbate peroxidase, inhibited the activity and expression of several enzymes (chlorophyllase, chlorophyll-degrading peroxidase, Mg-dechelatase, pheophytinase) and chlorophyll-degrading genes (BrChlase1, BrChlase2, and BrPPH), and increased the expression of the chlorophyll synthetase gene, BrHEMAL Collectively, the results demonstrate that LED treatment represents an effective method for delaying senescence and maintaining the quality of pakchoi by enhancing the activity and relative gene expression level of antioxidant enzymes and regulating chlorophyll metabolism.
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