Integrated Analysis of Transcriptomic and Metabolomic Data Reveals the Mechanism by Which LED Light Irradiation Extends the Postharvest Quality of Pak-choi (Brassica campestris L. ssp. chinensis (L.) Makino var. communis Tsen et Lee)
文献类型： 外文期刊
作者： Yan, Zhicheng 1 ; Zuo, Jinhua 1 ; Zhou, Fuhui 1 ; Shi, Junyan 1 ; Xu, Dongying 2 ; Hu, Wenzhong 2 ; Jiang, Aili 2 ; Liu, 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Vegetables, Key Lab Urban Agr North,Minist Agr,Beijing Key La, Key Lab Vegetable Postharvest Treatment,Key Lab B, Beijing 100097, Peoples R China
2.Dalian Minzu Univ, Coll Life Sci, Lab Biotechnol & Bioresources Utilizatio, Minist Educ, Dalian 116600, Peoples R China
关键词： Pak-choi; LED irradiation; RNA-seq; metabolomics; postharvest quality
期刊名称：BIOMOLECULES （ 影响因子：4.879； 五年影响因子：5.362 ）
ISSN：
年卷期： 2020 年 10 卷 2 期
页码：
收录情况： SCI
摘要： Low-intensity (10 mu mol m(-2) s(-1)) white LED (light-emitting diode) light effectively delayed senescence and maintained the quality of postharvest pakchoi during storage at 20 degrees C. To investigate the mechanism of LED treatment in maintaining the quality of pakchoi, metabolite profiles reported previously were complemented by transcriptomic profiling to provide greater information. A total of 7761 differentially expressed genes (DEGs) were identified in response to the LED irradiation of pak-choi during postharvest storage. Several pathways were markedly induced by LED irradiation, with photosynthesis being the most notable. More specifically, porphyrin and chlorophyll metabolism and glucosinolate biosynthesis were significantly induced by LED irradiation, which is consistent with metabolomics reported previously. Additionally, chlorophyllide a, chlorophyll, as well as total glucosinolate content was positively induced by LED irradiation. Overall, LED irradiation delayed the senescence of postharvest pak-choi mainly by activating photosynthesis, inducting glucosinolate biosynthesis, and inhibiting the down-regulation of porphyrin and chlorophyll metabolism pathways. The present study provides new insights into the effect and the underlying mechanism of LED irradiation on delaying the senescence of pak-choi. LED irradiation represents a useful approach for extending the shelf life of pak-choi.
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