College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
Int J Mol Sci. 2022 May 27;23(11):6011. doi: 10.3390/ijms23116011.
Flowering Chinese cabbage ( L. ssp. var. Tsen et Lee) is one of the most popular vegetables in China. However, the loss of the functional ingredients in postharvest flowering Chinese cabbage during storage is still serious, owing to the unclear causes of the metabolic shifts. Herein, benzoic acid, chlorine dioxide, and 1-methylcyclopropene (1-MCP) could maintain the quality of postharvest flowering Chinese cabbage, and 1-MCP showed the best effect. Furthermore, transcript-metabolite profiling of the treatments revealed a transcript-metabolite correlation network of the flavonoid biosynthesis pathways with a range of 3 to 3662 differentially expressed genes (DEGs) and a range of 23 to 37 differentially accumulated metabolites (DAMs). Surprisingly, 1-MCP had the best effect on shelf life among the treatments, although chlorine dioxide could stimulate the expression of four critical differential genes (, , , and ) involved in delaying flavonoid degradation (hesperetin, chalcone, rutin, baicalein). As a result, our findings will help to improve our understanding of the regulation of flavonoid production in relation to the quality of postharvest flowering Chinese cabbage during storage.
白菜花（芸薹属白菜亚种 var. Tsen et Lee）是中国最受欢迎的蔬菜之一。然而，由于代谢变化原因尚不明确，在贮藏过程中，白菜花中功能性成分的损失仍然很严重。在此，苯甲酸、二氧化氯和 1-甲基环丙烯（1-MCP）可以保持采后白菜花的品质，其中 1-MCP 的效果最好。此外，处理的转录代谢组学分析揭示了黄酮类生物合成途径的转录代谢物相关网络，涉及 3 到 3662 个差异表达基因（DEGs）和 23 到 37 个差异积累代谢物（DAMs）。令人惊讶的是，1-MCP 在处理中对货架期的影响最好，尽管二氧化氯可以刺激四个关键差异基因（、、、和）的表达，这些基因涉及延缓黄酮类化合物的降解（橙皮素、查尔酮、芦丁、黄芩素）。因此，我们的研究结果将有助于提高对采后白菜花贮藏过程中黄酮类物质生产与品质调控关系的认识。
