UVA Enhanced Promotive Effects of Blue Light on the Antioxidant Capacity and Anthocyanin Biosynthesis of Pak Choi

文献类型： 外文期刊

第一作者： Huang, Jing

作者： Huang, Jing;Liu, Xinying;Yang, Qichang;Zheng, Yinjian;Bian, Zhonghua;Wang, Sen;Mao, Pengpeng;Xu, Yaliang;Huang, Jing;Liu, Xinying;Yang, Qichang;Zheng, Yinjian;Bian, Zhonghua;Wang, Sen;Mao, Pengpeng;Xu, Yaliang;Huang, Jing;Lei, Bingfu;Li, Wei

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关键词： UVA; blue light; promotive effects; growth; antioxidant capacity; anthocyanin biosynthesis

期刊名称：HORTICULTURAE （ 影响因子：2.923； 五年影响因子：3.582 ）

ISSN：

年卷期： 2022 年 8 卷 9 期

页码：

收录情况： SCI

摘要： Anthocyanins are widely common natural antioxidants and represent an important economic feature in vegetables, but the potential response of UVA-blue co-irradiation on the anthocyanin biosynthesis of pak choi is not clear. Here, we investigated the effects of the supplement of four doses of UVA to blue light on growth, metabolites and the anthocyanin biosynthesis of two cultivars of pak choi. The results revealed that supplementing UVA light to blue light positively affected the growth of the pak choi and elevated the soluble protein content and antioxidant capacity. Especially, when compared with a monochromatic blue light, the anthocyanin synthesis was enhanced with an increase in UVA light strength, which reached a peak value at the strength of 10 mu mol center dot m(-2)center dot s(-)(1). Further study revealed that the UVA-blue co-irradiation enhanced the transcription of partial light-induced and anthocyanin structural genes. The intraspecific difference in the expression patterns of MYB1 and PAP1 were observed in these two tested cultivars. MYB1 was significantly up-regulated in red-leaf pak choi, but down-regulated in purple-leaf pak choi. On the contrary, PAP1 was significantly up-regulated in purple-leaf pak choi, but down-regulated in red-leaf pak choi. To sum up, this study established an efficient pre-harvest lighting strategy to elevate the economic value of pak choi.

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