The high energy photons in solar UV radiation are considered to be the most damaging component to the biological macromolec...
... middle of paper ...
...x, which is involved in quorum sensing mediated biofilm formation (Morohoshi et al., 2010). Therefore, it is likely that loss of vioA has affected the biofilm formation in Ant5-2. Moreover, colony morphology demonstrated that PVP had substantial effect on the structural organization of colony biofilms (Fig. 4). The mechanisms whereby pigment production control colony morphology and EPS production is likely to be a complex issue yet to be determined (Dietrich et al., 2008).
Until recently, the potential role of pigments as secondary metabolites modulating the cellular physiology of microorganisms in extreme environments has been neglected (Hernandez & Newman, 2001). This study provides an evidence for the role of PVP as a secondary metabolite in UV resistance and suggests its functions of primary importance in Ant5-2 residing in Antarctic extreme conditions.
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