Salinity induced synthesis of UV-screening compound scytonemin in the cyanobacterium Lyngbya aestuarii - PubMed (original) (raw)
Salinity induced synthesis of UV-screening compound scytonemin in the cyanobacterium Lyngbya aestuarii
Jnanendra Rath et al. J Photochem Photobiol B. 2012.
Abstract
Lyngbya aestuarii is the dominant cyanobacterium in Chilika lagoon occurring in all the seasons irrespective of variation in the salinity regime ranging from 3 to 28 ppt. The organism possess the UV screening scytonemin pigment, which was maximum when grown at 56 ppt salinity. Three different forms of scytonemin were detected in L. aestuarii with retention time (RT) 1.76, 2.42 and 2.94 min, however, occurrence of these forms was influenced by the salinity. Scytonemin with RT 2.42 was sensitive to higher salinity and its maximum concentration was obtained at 28 ppt salinity correlated with the highest salinity level of Chilika. Formation of multilayer colored sheath around the trichome was prominently observed at the salinity of the culture from 28 to 56 ppt. But at salinity below 7 ppt and also at more than 56 ppt salinity degradation of sheath with corresponding decrease in scytonemin was observed.
Copyright © 2012 Elsevier B.V. All rights reserved.
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