A Comparative Study of in vivo Plant and in vitro Callus Extracts of Centratherum punctatum Cass

Abstract

The present study aims at comparative study between plant and callus extract, with respect to analysis of phytochemical constituents, antioxidant, antibacterial activity and cytotoxicity properties of Centratherum punctatum using aqueous medium and different solvents such as, methanol and ethyl acetate. In vitro studies in MS media supplemented with BAP 4.5 mg/L + Kn 4.0 mg/L has shown the high callus induction percentage of 92.33% with a maximum callus weight of 1.08 g. The phytochemical analysis of aqueous, methanol and ethyl acetate extract of C. punctatum in vivo plant and in vitro callus showed the presence of alkaloids, flavonoids, phenols and carbohydrates. The aqueous extract of both plant and callus showed the presence of tannins, proteins and steroids whereas the methanol extract showed the presence of tannins, amino acids and terpenoids. The ethyl acetate extract showed terpenoids and protein. FTIR analysis of plant and callus aqueous extract had a maximum characteristic band at 3399.87 cm-1 and 3412.73 cm-1 respectively indicating the presence of N-H stretching. GC-MS analysis revealed the presence of 11 different compounds in ethyl acetate extracts of plant and the callus extract revealed the presence of 15 different compounds which was absent in the plant extract. Plant extract exhibited maximum total phenol content than callus extract. The in vitro callus extract showed higher DPPH radical scavenging activity with lower inhibition percentage than in vivo plant extract. A maximum zone of inhibition was observed in methanol extract of in vivo plant and in vitro callus (15 mm and 14 mm respectively) against Bacillus subtilis. The ethyl acetate extract of in vivo plant and in vitro callus had a zone of 14 mm and 12 mm against E. coli. A maximum zone of inhibition (12 mm and 11 mm respectively) was observed in both methanol and ethyl acetate of in vivo plant and in vitro callus against Staphylococcus aureus. Antiproliferative analysis revealed that in vivo plant has inhibitory percentage of 23.6 whereas callus exhibited 28.5% against HeLa cells.