Phytochemical Profile, Antioxidant and Antimicrobial Potency of Aerial Parts of Salvia Tomentosa Miller

Abstract

Antioxidant activity, antimicrobial potency and components of the aerial parts (leaf, stem, flower and mixture) of Salvia tomentosa Miller were determined qualitatively and quantitatively in this study. Aqueous extracts of Salvia tomentosa (ST) were prepared by using the flower, leaf and stem parts and all the above-ground parts of the plant (flower-leaf-stem mixture) for this purpose. The radical scavenging activity, total antioxidant/oxidant status, antimicrobial potential, phenolic substances and qualitative/quantitative analyzes of the components in the extracts were determined. ST-stem phenolic acid amount (599±34 mg gallic acid equivalent (GAE)/g extract) was found to be close to the standard substance caffeic acid (651±31 mg GAE/g extract). Total antioxidant status of ST-mix (3.4±0.1 mmol Trolox Equiv./L) and ST-stem (3.4±0.1 mmol Trolox Equiv./L) and natural antioxidant Vitamin C (3.6±0.1 mmol Trolox Equiv./L) were not statistically different. The extract produced by using S. tomentosa aerial parts (flower-stem-leaf) showed stronger antioxidant and antimicrobial activity than the aqueous extracts obtained separately from the flower, stem and leaf of the plant. However, it was determined that the components of the separately prepared flower, stem and leaf extracts and the extract components obtained from the aerial parts were largely similar. At the same time, it was observed that there were significant differences in the presence of these components.