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China Surfactant Detergent & Cosmetics ›› 2022, Vol. 52 ›› Issue (12): 1293-1299.doi: 10.3969/j.issn.1001-1803.2022.12.005

• Development and application • Previous Articles     Next Articles

Analysis of flavonoid metabolic pathways of different varieties of Phalaenopsis and their molecular mechanism

Cheng Ling*(),Wang Jianping   

  1. School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
  • Received:2022-06-16 Revised:2022-12-05 Online:2022-12-22 Published:2022-12-29
  • Contact: Ling Cheng E-mail:chengling630614@hust.edu.cn.

Abstract:

High performance liquid chromatography (HPLC) was used to study the flavonoid metabolism pathways of 18 Phalaenopsis. A HPLC technology was established to analyze the pathway of flavonoid metabolism (regulate color). Fluorescence quantitative PCR (Real-Time PCR) was used to further analyze the expression level of key genes in Phalaenopsis flavonoid synthesis pathway, and an Agrobacterium-mediated transient transformation of Phalaenopsis was used to obtain transgenic strains. Phalaenopsis HPLC separation technology can successfully separate 29 components, which is quite different from other species of grape and hyacinth. Real-Time PCR analysis of the key genes in the flavonoid synthesis pathway of different species of Phalaenopsis finds that the temporal and spatial expression patterns of Chalcone synthase (CHS), Flavonol-3-hydroxylase (F3H) and Chalcone isomerase (CHI) of different species are basically the same. The key enzyme gene RNAi interference vector is constructed by Agrobacterium-mediated method to transform Phalaenopsis transiently. The interference expression of key enzyme genes in the flavonoid synthesis pathway will reduce the color of Phalaenopsis. In conclusion, the HPLC research method of Phalaenopsis flavonoid metabolism pathway is established, and its molecular mechanism is preliminary studied, which provids a theoretical and practical basis for revealing the color regulation mechanism of Phalaenopsis orchids.

Key words: Phalaenopsis, flavonoid metabolism, high performance liquid chromatography, molecular mechanism

CLC Number: 

  • TQ658