| Title: | Deciphering the Metabolic Pathways of Pitaya Peel after Postharvest Red Light Irradiation |
| Author(s): | Wu Q; Gao H; Zhang Z; Li T; Qu H; Jiang Y; Yun Z; |
| Address: | "Center of Economic Botany, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China. Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510600, China. College of Food Science and Technology, Hainan University, Haikou 570228, China" |
| ISSN/ISBN: | 2218-1989 (Print) 2218-1989 (Electronic) 2218-1989 (Linking) |
| Abstract: | "Red light irradiation can effectively prolong the shelf-life of many fruit. However, little is known about red light-induced metabolite and enzyme activities. In this study, pitaya fruit was treated with 100 Lux red light for 24 h. Red light irradiation significantly attenuated the variation trend of senescence traits, such as the decrease of total soluble solid (TSS) and TSS/acidity (titratable acidity, TA) ratio, the increase of TA, and respiratory rate. In addition, the reactive oxygen species (ROS) related characters, primary metabolites profiling, and volatile compounds profiling were determined. A total of 71 primary metabolites and 67 volatile compounds were detected and successfully identified by using gas chromatography mass spectrometry (GC-MS). Red light irradiation enhanced glycolysis, tricarboxylic acid (TCA) cycle, aldehydes metabolism, and antioxidant enzymes activities at early stage of postharvest storage, leading to the reduction of H(2)O(2), soluble sugars, organic acids, and C-6 and C-7 aldehydes. At a later stage of postharvest storage, a larger number of resistance-related metabolites and enzyme activities were induced in red light-treated pitaya peel, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical-scavenging, reducing power, fatty acids, and volatile aroma" |
| Keywords: | ROS-related characters fruit decay pitaya primary metabolites red light volatile compounds; |
| Notes: | "PubMed-not-MEDLINEWu, Qixian Gao, Huijun Zhang, Zhengke Li, Taotao Qu, Hongxia Jiang, Yueming Yun, Ze eng 31671911/National Natural Science Foundation of China/ Switzerland 2020/03/19 Metabolites. 2020 Mar 14; 10(3):108. doi: 10.3390/metabo10030108" |
