Some biological evaluations on samanea saman

ABSTRACT

Samanea saman [Jacq.] Merr. Was subjected to bioactivity analysis. The records of these investigations are described in this communication. A battery of assays was performed on hexane and methanol extracts of Samanea saman leaves, which include antibacterial activity, antifungal activity, brine shrimp bioassay, Lemna bioassay and insecticidal activity. Both the extracts showed moderate antibacterial activity against Pseudomonas aeruginosa where as moderate antifungal activity of hexane extract against Fusarium solani and of methanol extract against Trichophyton longifusus was observed. In brine shrimp bioassay the methanol extract exhibited cytotoxicity with LD[50] value of 757.3672 micro g/ml. In Lemna bioassay the methanol extract in concentration of 1000 micro g/ml significantly inhibited the growth of Lemna. The results of insecticidal activity showed that the hexane extract of Samanea saman exhibited 505 mortality against Rhyzopertha dominica and Tribolium granarium where as methanol extract remained inactive against all the tested insects