Integrated transcriptomic and metabolomic analysis of delayed leaf yellowing in postharvest pak choi (Brassica rapa subsp. chinensis) by 2-ethylhexanol (2-EH)
文献类型： 外文期刊
作者： Wang, Mina 1 ; Yue, Xiaozhen 1 ; Yu, Lingda 3 ; Lin, Zixin 1 ; Yuan, Shuzhi 1 ; Xu, Xiaodi 1 ; Zuo, Jinhua 1 ; Feng, Bihong 2 ; Wang, Qing 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Agrifood Proc & Nutr, Beijing Vegetable Res Ctr, Key Lab Vegetable Postharvest Proc ,Minist Agr & R, Beijing 100097, Peoples R China
2.Guangxi Univ, Coll Agr, Nanning 530004, Peoples R China
3.Chongqing Univ Arts & Sci, Inst Special Plants, Coll Landscape Architecture & Life Sci, Chongqing 402160, Peoples R China
关键词： Fumigation; Chlorophyll; Antioxidant; Cell membrane; Shelf life
期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：6.8； 五年影响因子：7.5 ）
ISSN： 0925-5214
年卷期： 2025 年 222 卷
页码：
收录情况： SCI
摘要： The antioxidant properties of 2-ethylhexanol (2-EH) have the potential to maintain the quality of pak choi during storage. Therefore, the effect of 2-EH on pak choi during storage for 7 d at 20 degrees C and 90 % relative humidity (RH) was investigated. Results demonstrated that fumigation of pak choi with 2-EH maintained the quality of pak choi by reducing the respiration rate, ethylene generation, the level of malondialdehyde (MDA), and electrolyte leakage, while increasing the level of total soluble solids (TSS), ascorbic acid, flavonoids, total phenolics, and alpha-linolenic acid, relative to the untreated control. Transcriptomic and metabolomic analyses revealed that 2EH mitigated chlorophyll degradation by up-regulating the expression of CRD1, POR, DVR, CHLP, and CHLG in the porphyrin and chlorophyll metabolism pathways, and by down-regulating SGR2. 2-EH also increased antioxidant enzyme activity and up-regulated the expression of PAL, C4H, BRT1, CYP98A, CCR, FLS, and LDOX in the phenylpropanoid and flavonoid biosynthesis pathways, increased phenolic content, and enhanced antioxidant capacity, thereby, mitigating excessive accumulation of reactive oxygen species (ROS). The 2-EH treatment also up-regulated HPL1 and AOS genes in the alpha-linolenic acid metabolic pathway and down-regulated the expression of ACOX and MFP2, thus, increasing alpha-linolenic acid content and maintaining cell membrane structure. In summary, our study demonstrated that 2-EH maintained pak choi quality during storage and provided insights into the underlying molecular and metabolic changes associated with delayed yellowing of pak choi by 2-EH.
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