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CmHY5 functions in apigenin biosynthesis by regulating flavone synthase II expression in chrysanthemum flowers

文献类型： 外文期刊

作者： Luo, Chang 1 ; Liu, Lei 1 ; Zhao, Jian 1 ; Xu, Yanjie 1 ; Liu, Hua 2 ; Chen, Dongliang 2 ; Cheng, Xi 2 ; Gao, Junping 1 ; Hong, Bo 1 ; Huang, Conglin 2 ; Ma, Chao 1 ;

作者机构： 1.China Agr Univ, Coll Hort, Dept Ornamental Hort, Beijing Key Lab Dev & Qual Control Ornamental Crop, Beijing 100193, PR China, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Grassland, Flowers & Ecol, Beijing 100092, Peoples R China

关键词： Apigenin; Chrysanthemum; Flavone synthase II; Flavonoid; Flower organ; ELONGATED HYPOCOTYL5 (HY5); Transcription factors

期刊名称：PLANTA （ 影响因子：4.54； 五年影响因子：4.689 ）

ISSN： 0032-0935

年卷期： 2023 年 257 卷 1 期

页码：

收录情况： SCI

摘要： Main conclusion The predominant flavones in the ray florets of chrysanthemum flowers are apigenin and its derivatives. CmHY5 participates in apigenin biosynthesis by directly regulating the expression of FNSII-1 in chrysanthemum. Chrysanthemum (Chrysanthemum morifolium) flowers have been used for centuries as functional food and in herbal tea and traditional medicine. The chrysanthemum flower contains significant amounts of the biologically active compound flavones, which has medicinal properties. However, the mechanism regulating flavones biosynthesis in chrysanthemum flowers organs is still unclear. Here, we compared the transcriptomes and metabolomes of different floral organs between two cultivars with contrasting flavone levels in their flowers. We identified 186 flavonoids by metabolome analysis. The predominant flavones in the ray florets of chrysanthemum flowers are apigenin and its derivatives, of which the contents are highly correlated with the expression of flavones synthase II gene CmFNSII-1. We also determined that CmHY5 is a direct upstream regulator of CmFNSII-1 transcription. We showed that CmHY5 RNAi interference lines in chrysanthemum have lower contents of apigenin compared to wild-type chrysanthemum. Our results demonstrated that CmHY5 participates in flavone biosynthesis by directly regulating the expression of FNSII-1 in chrysanthemum.

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