A WRKY transcriptional factor, BrWRKY70, involves in stem lignification in postharvest Chinese flowering cabbage by regulating lignin synthesis

文献类型： 外文期刊

第一作者： Li, Fengjun

作者： Li, Fengjun;Wu, Meiting;Li, Lilang;Liu, Hai;Li, Fengjun;Wu, Meiting;Li, Lilang;Liu, Hai;Wang, Ling;Chen, Yulong

作者机构：

关键词： Transcriptional regulation; Lignin accumulation; Leafy vegetable; Modified atmosphere packaging

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 228 卷

页码：

收录情况： SCI

摘要： Stem lignification leads to decline in quality and restricts the shelf life of Chinese flowering cabbage. However, the role of transcription factors in this process is unclear. This study demonstrates that modified atmosphere packaging (MP30) effectively delayed lignification and lignin accumulation during postharvest storage. Moreover, a novel WRKY transcriptional activator (BrWRKY70) was identified, whose expression upregulated during storage but was suppressed by MP30. BrWRKY70 directly activated downstream lignin synthetic genes BrPAL3, BrPODC3, and BrPOD69 by binding to their promoters. Additionally, functional validation in Arabidopsis thaliana showed that BrWRKY70 accelerated lignin and flavonoid synthesis via upregulating the expressions of related genes. Our findings suggest that BrWRKY70 acts as a transcriptional activator, promoting lignin synthesis and accelerating stem lignification in Chinese flowering cabbage.

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