Isolation of N- Methyl Formamide from Red Algae Portieria hornemannii (Lyngbye) P.Silva Active against Two Plant Pathogenic Bacteria

In the present investigation, a purified compound exhibiting antibacterial activity isolated in 1:1 (v/v) chloroform: methanol of red alga Portieria hornemannii collected along the coast of Pamban, Rameshwaram (Gulf of Mannar), Tamilnadu, India during Feburary 2007 was identified based on the HPLC,IR, NMR(1H &13C) spectral data.This compound is colorless crystalline nature and yield of purified compound was 53.3mg-1 Kg shade dried alga 0.00533% dry alga.The purified compound of 50 µg showed 14.3±0.56mmand 15.5±0.25mmdiameter zone of inhibition, whereas 100µg of commercial antibiotic Streptomycin sulphate showed 37.6±0.56mmdiameter zone of inhibiton against the test bacterium Xanthomonas axonopodies pv citri and Xanthomonas carnpestris pv malvacearum through agar diffusion technique.