Abstract
Abstract The present study aims to investigate the antifouling efficacy of lanosterol when lanosterol coated PVC sheets were exposed into natural sea water (Tuticorin coastal water, Gulf of Mannar, India) up to one year. The average fouling load on the lanosterol coated PVC coupons were 0.16 kg/m 2 (10 μg), 0.095 kg/m 2 (100 μg) and 0.02 kg/m 2 (1000 μg) recorded from July 2013 to June 2014. Interestingly, up to one year of exposure, there was no significant growth/fouling organisms on lanosterol coated coupons, whereas drastic fouling was observed in control. Thus, the bactericidal chemical compounds could be used as substitutes for anti-fouling compounds owing to their eco-friendly nature. Lanosterol exhibits anti-biofilm activity and anti-quorum sensing activity against dominated micro-fouling bacterial groups and their receptor proteins like N -acylhomoserinelactone and oligopeptide. Results from this study shows early stage micro-fouling bacterial colonies produce allelopathic substance like bacteriocin or antimicrobials which control the biofouling.
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