The correlation between bioactive components of Fallopia multiflora root and environmental factors.

Area of Science:

• Pharmacognosy
• Plant Chemistry
• Environmental Science

Background:

• Fallopia multiflora (Thunb.) Harald is a traditional Chinese medicinal plant utilized for treating dizziness.
• The plant's therapeutic efficacy is linked to its bioactive components, necessitating an understanding of factors influencing their content.

Purpose of the Study:

• To investigate the influence of environmental factors on the content of five key bioactive components in Fallopia multiflora.
• To identify specific environmental variables that correlate with the accumulation of these compounds.

Main Methods:

• Samples of F. multiflora were collected from ten diverse locations.
• Five bioactive components were quantified using high-performance liquid chromatography (HPLC).
• Statistical analyses, including correlation and stepwise regression, were employed to assess relationships between 17 environmental factors and compound levels.

Main Results:

• Significant variations in bioactive component content were observed across different geographical locations, with Deqing samples showing superior quality and Tianyang samples inferior quality.
• Emodin and physcion content exhibited negative correlations with average and accumulated temperatures, and physcion also correlated negatively with soil organic matter.
• Emodin content positively correlated with soil available potassium (K) and zinc (Zn). Accumulated temperature was identified as the primary factor influencing emodin and physcion levels.
• No significant correlations were found between environmental factors and 2,3,5,4'-tetrahydroxystilbene-2-O-beta-D-glucoside, emodin-8-O-beta-D-glucoside, or physcion-8-O-beta-D-glucoside.

Conclusions:

• Environmental factors, particularly accumulated temperature and soil nutrients, significantly influence the content of dissociated anthraquinones (emodin, physcion) in Fallopia multiflora.
• Combined anthraquinones (glucosides) showed no significant correlation with the studied environmental factors, suggesting different biosynthetic pathways or regulatory mechanisms.