CULTURE AND ANTIBACTERIAL ACTIVITY OF SELECTED MARINE MICROALGAE FROM ENAYAM COAST, WEST COAST OF INDIA

摘要

Eleven species of diatoms collected from Enayam, West Coast of India, were cultured in six different culture media. The Walne's and F/2 media were found to be more suitable for all the diatom species cultured. The optimum temperature for microalgal growth was 20℃. The salinity range of 25 - 28 ppt was most suitable for the algal growth. The relationship between pH and the growth of diatom were also studied. The diatoms showed the peak growth at 7.2 pH. Different solvent fractions of the diatom extracts were used to study their antibacterial activity against thirteen pathogenic bacteria. Of the six diatoms studied, Thallassiothrix frauenfeldii showed highest activity against almost all the tested bacteria. The diethyl ether extracts were more active against most of the pathogens. The diatoms are potentially good source of new antibacterial agents.