Transcriptomic and metabolomic analyses reveal the mechanism of cold chain breaks accelerate postharvest kiwifruit ripening and flavonoid loss

文献类型： 外文期刊

第一作者： Yang, Haiying

作者： Yang, Haiying;Li, Yiyang;Wang, Rongrong;Shan, Yang;Yang, Haiying;Ding, Ke;Shan, Yang;Ding, Shenghua;Zhang, Shikai;Ding, Ke;Shan, Yang;Ding, Shenghua

作者机构：

关键词： Kiwifruit; Cold chain break; Fruit quality; Metabolome; Transcriptome; WGCNA

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2025 年 341 卷

页码：

收录情况： SCI

摘要： Cold chain systems are essential for preserving the quality and nutritional value of kiwifruit and other fruits, as well as facilitating their transportation and supply. Cold chain breaks can adversely affect fruit quality and value. Therefore, exploring its metabolism and molecular basis research is of great significance for regulating cold chain breaks. Herein, the effects of kiwifruit storage under isothermal and cold chain breaks were compared and its physicochemical properties, metabolism and transcriptome profiles were investigated. Metabolomic analyses revealed that flavonoids are the primary differential metabolites suppressed by cold chain breaks. Additionally, five main biomarkers were identified in response to cold chain breaks. Transcriptomic and WGCNA analyses demonstrated that the majority of differentially expressed genes associated with ethylene synthesis and signal transduction (ACS, ACOs, ETRs), as well as starch and sucrose metabolism (BAMs, SPS, PFK, TPP), were upregulated during cold chain disruptions compared to low temperatures, while DEGs related to flavonoid biosynthesis (4CLs, CHI, F3 ' H) were downregulated. Furthermore, transcription factor AcHsfA3a was found to be correlated with flavonoids and the identified biomarkers. This study provides a theoretical basis for regulating kiwifruit cold chain breaks, improving fruit quality, and guiding cold chain transportation.

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