[Correlations between wild Polygonatum odoratum quality and main ecological factors]

Area of Science:

• Biochemistry
• Ecology
• Phytochemistry

Context:

• Wild Polygonatum odoratum's effective components and antioxidant activity are influenced by various ecological factors.
• Understanding these relationships is crucial for optimizing the cultivation and utilization of P. odoratum.

Purpose:

• To investigate the correlations between ecological factors and the effective components (polysaccharides, soluble substances) of wild P. odoratum.
• To determine the key factors affecting the antioxidant activity of P. odoratum.

Summary:

• Stepwise regression, principal component analysis, and grey relational grade analysis revealed that climatic factors (temperature, precipitation) and soil factors (pH, total potassium) significantly impact P. odoratum's effective component content, contributing 99.0%.
• Soil total potassium, mean annual precipitation, and mean January air temperature were identified as key controlling, decision, and limiting factors, respectively.
• Higher contents of plant polysaccharides and water-soluble substances directly correlate with increased antioxidant activity, specifically enhanced DPPH free radical scavenging capability.

Impact:

• Identifies critical ecological drivers for P. odoratum's bioactive compound production.
• Provides insights into optimizing environmental conditions for maximizing antioxidant properties.
• Supports sustainable harvesting and potential biotechnological applications of P. odoratum.