Department of Botany, Visva-Bharati University, Santiniketan 731 235, India.
J Photochem Photobiol B. 2012 Oct 3;115:5-8. doi: 10.1016/j.jphotobiol.2012.06.002. Epub 2012 Jul 1.
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.
赤潮藻月牙藻是 Chilika 泻湖的优势蓝藻，在所有季节都存在，无论盐度范围从 3 到 28 ppt 如何变化。该生物具有紫外线屏蔽物质 Scytonemin，当在 56 ppt 的盐度下生长时，其含量最高。在 L. aestuarii 中检测到三种不同形式的 Scytonemin，保留时间（RT）分别为 1.76、2.42 和 2.94 分钟，然而，这些形式的出现受到盐度的影响。具有 RT 2.42 的 Scytonemin 对高盐度敏感，其最大浓度在 28 ppt 盐度下获得，与 Chilika 的最高盐度相对应。在从 28 到 56 ppt 的培养盐度下，明显观察到围绕着藻丝的多层彩色鞘的形成。但是，在盐度低于 7 ppt 时，以及在超过 56 ppt 的盐度下，鞘的降解伴随着 Scytonemin 的相应减少。
