UV induced DNA damage and repair in marine bacteria

摘要: The continuous depletion of the Earth's ozone layer by anthropogenic activities has fueled concern about impact increasing solar ultraviolet-B radiation (UV-B) on aquatic ecosystems. DNA is one key targets for UV-induced damage in organisms.. Thus, organisms have developed a number enzymes, repair and tolerance mechanisms to counteract damaging effects UV. continuing not only caused but also causes an abrupt collapse primary photosynthetic production, resulting subtle, community-level responses that could ultimately higher trophic levels. pH oceans changing due increase amount dissolved CO2 thus causing ocean acidification disturbing biogeochemical cycles marine environment. To study consequences acidification, response bacteria (in terms survival) under changes upon UVR exposure, preliminary work been done Pseudomonas pseudoalcaligenes NP103 P. aeruginosa N6P6 isolated from Odisha coast. sensitivity bacterium UV-B different dosages determined colony counting spectrophotometry growth method. percentage survival calculated method was 0.005% 0.004% respectively (UVR exposure 5 sec). UV dosage studied spectrophotometrically. In case maximum at 8 which decreased with decline medium. Whereas N6P6, optimum observed 7. findings suggest crucial role system varies bacterial species. Decline water current 8.2-8.4 expected affect some groups