Metabolomics

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Metabolome and comparative genome provide insights into secondary metabolites generation of a rare karst-growing Rhododendron in vitro culture


ABSTRACT:

Rhododendron species have the potential to be rich in secondary metabolites with pharmaceutical or industrial value. However, there is a lack of in comprehensive metabolome studies at the genome level, particularly for unique and rare species like R. bailiense which exclusively grows in karst environments in Guizhou, southwest China. Recently, genome assembly data for this species was available. In this study, non-targeted metabolomics was employed to investigate the secondary metabolites profile of R. bailiense callus. The callus of R. bailiense was induced using 0.2 mg/L TDZ (Thidiazuron) + 0.1 mg/L IBA (3-Indole butyric acid). A comparison between light-treated calli and dark-cultured calli revealed differential accumulation of metabolites, particularly in flavonoids, terpenoids, coumarins and hydroxycinnamic acids, known for their beneficial effects such as antioxidant, anticancer and anti-inflammatory properties. Proanthocyanidins, with various health-promoting effects, were found to accumulate significantly in dark-cultured calli. Light conditions promoted diterpene and triterpene products, whereas darkness favored sesquiterpene products. Additionally, the study demonstrated the potential of utilizing Agrobacterium transformation technology on callus suspension cells to enhance secondary metabolite production. Comparison with the genome of R. molle revealed that the R. bailiense genome exhibited active 'glycosyltransferase activity', possessed a higher number of copies of monoterpene and sesquiterpene terpene synthases, and contained high copies of specific cytochrome P450 members (CYP71, CYP76, CYP79, CYP82, CYP736). This study offers valuable insights and potential strategies for the biosynthesis and production of Rhododendron secondary metabolites with pharmaceutical or industrial significance.

INSTRUMENT(S): Liquid Chromatography MS - negative - reverse phase, Liquid Chromatography MS - positive - reverse phase

PROVIDER: MTBLS11581 | MetaboLights | 2025-01-02

REPOSITORIES: MetaboLights

Dataset's files

Source:
Action DRS
Metabolite summary.xlsx Xlsx
NEG_Gc14WSL_BLD_1.raw Raw
NEG_Gc14WSL_BLD_2.raw Raw
NEG_Gc14WSL_BLD_3.raw Raw
NEG_Gc14WSL_BLD_4.raw Raw
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