%0 Generic %A Chen, Ruibing %A Chen, Xianghui %A Zhu, Tingting %A Liu, Jianghua %A Xiang, Xing %A Yu, Jian %A Tan, Hexin %A Gao, Shouhong %A Li, Qing %A Fang, Yichao %A Chen, Wansheng %A Zhang, Lei %A Huang, Baokang %D 2018 %T Table_3_Integrated Transcript and Metabolite Profiles Reveal That EbCHI Plays an Important Role in Scutellarin Accumulation in Erigeron breviscapus Hairy Roots.PDF %U https://frontiersin.figshare.com/articles/dataset/Table_3_Integrated_Transcript_and_Metabolite_Profiles_Reveal_That_EbCHI_Plays_an_Important_Role_in_Scutellarin_Accumulation_in_Erigeron_breviscapus_Hairy_Roots_PDF/6627839 %R 10.3389/fpls.2018.00789.s006 %2 https://frontiersin.figshare.com/ndownloader/files/12126635 %K Erigeron breviscapus %K correlation analysis %K scutellarin %K chalcone isomerase %K hairy root culture %X

Scutellarin, a flavonoid 7-O-glucuronide, is an essential bioactive compound of Erigeron breviscapus (Vaniot) Hand.-Mazz. used for the treatment of cerebrovascular diseases. However, due to overexploitation and overuse, E. breviscapus is facing the problems of extinction and habitat degradation. In this study, a correlation analysis between the transcript and metabolite profiles of methyl jasmonate (MeJA)-treated E. breviscapus at different time points indicated that chalcone isomerase (EbCHI) was the primary contributor to scutellarin accumulation during flavonoid biosynthesis. EbCHI was then further characterized as a chalcone isomerase that efficiently converted chalcone to naringenin in vitro. Optimal parameters derived by comparing different culture conditions were successfully used to establish hairy root cultures of E. breviscapus with a maximum transformation rate of 60% in B5 medium. Furthermore, overexpression of EbCHI significantly enhanced scutellarin accumulation in E. breviscapus hairy roots with a maximum content of 2.21 mg g-1 (dw), 10-fold higher than that of natural roots (0.21 mg g-1 dw). This study sheds new light on a method of effective gene-based metabolic engineering by accurate and appropriate strategies and provides a protocol for hairy root cultures that accumulate high levels of scutellarin, providing a promising prospect for relieving the overexploitation and unavailability of E. breviscapus in the future.

%I Frontiers