Does plant form recapitulate its therapeutic function? a test for red sap plants.

Area of Science:

• Ethnobotany
• Phytochemistry
• Traditional Medicine

Background:

• The Doctrine of Signatures posits a link between a plant's appearance and its therapeutic use.
• This concept is often dismissed as unscientific, with few empirical tests conducted.
• Red sap in plants is a popular characteristic within the Doctrine of Signatures, linked to blood disorders.

Purpose of the Study:

• To empirically test the Doctrine of Signatures concerning red sap plants and blood disorders.
• To investigate the relationship between red sap, medicinal uses, and phylogenetic proximity.

Main Methods:

• Systematic literature review to identify red sap-containing plants globally.
• Random selection of control plant species without red sap from similar regions.
• Recording and comparative analysis of medicinal uses for all selected plant species.

Main Results:

• Plants with red sap were found to be three times more likely to be used for treating blood disorders.
• Red sap species used for blood disorders were phylogenetically clustered.
• The presence of red quinones, known for wound healing, is a potential mechanistic link.

Conclusions:

• The study provides empirical support for the Doctrine of Signatures regarding red sap and blood disorders.
• Phylogenetic clustering suggests shared evolutionary or chemical properties.
• Further research into plant secondary metabolites and therapeutic efficacy is warranted.