Abstract
In present study, different leaves, roots and floral extracts i.e. methanol, chloroform, and n-hexane of Ranunculus laetus (R. laetus) were tested to find out their bioactivities. The yield obtained from the methanolic extracts was 15.12%, 20.5% and 31.3%, while that of chloroform extracts 4.15%, 16.15% and 29.6% and that of n-hexane extract 4.52%, 10.55% and 31.8%. The established protocols were carried out with slight modifications for phytochemical and pharmacological activities. Phytochemical screening revealed the presence of carbohydrates, glycosides, cardiac glycosides, saponins, flavonoids, cumarins, steroids, proteins, and amino acids, fixed fats and oils in all fractions. Floral extracts were found to contain highest total phenolic contents (64 to 73 mg GAE/g), whereas leaves n-hexane fraction exhibited maximum DPPH potential (70 %). All the extracts showed promising antimicrobial activity in terms of zone of inhibition against selected bacterial strains, both Gram positive and Gram negative i.e. from 1.33 mm to 25.66 mm and against fungal strains i.e. from 1.33 mm to 24.33 mm. These findings suggest that the different parts of R. laetus exhibiting different biological activities and could be used as a promising source of novel drugs.

ZAMARA MASOOD, FAROOQ SALEEM, SARFRAZ AHMAD, TALHA JAMSHAID, IMRAN WAHEED, MUHAMMAD AZEEM, HAFIZ MUHAMMAD ARSALAN, UMAR FAROO KGOHAR. (2020) Phytochemical screening and evaluation of antioxidant, antimicrobial, cytotoxic and dermal irritant activities of Ranunculus laetus extracts, Biologia – Journal of Biological Society of Pakistan, Volume 66(I), Issue 1.
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