Variation of Carbon Sequestration in Relation to Leaf Level RNA:DNA In Sundarban Mangrove, India Review Article, Majumder N, Chowdhury C, Jana TK* Department of Marine Science, Calcutta University, Kolkata, India, International Journal of Marine Science and Ocean Technology, 3(4), 33-39. Abstract: Mangrove productivity varies in space and time depending on community structure, phenology, resource availability and salinity stress. In Indian Sundarbans, mangrove species with different growth rate sequester significant amount of carbon. This study reports the applicability of using leaf level RNA:DNA ratios for assessing intraspecific and interspecific differences in carbon sequestration of four mangrove species under field condition. It was observed that DNA concentration in mangrove leaves varied within a relatively narrow range, and higher variations in RNA could indicate its direct implication in protein synthesis, which in turn was strongly dependent on environmental condition such as nitrogen (N) and phosphorus (P) availability and salinity stress. Leaf level RNA:DNA ratio in mangrove could be a good indicator of carbon sequestration and mangrove could maintain high carbon sequestration rate under nutrient limited condition through nutrient conservation strategies. Keywords: Nucleic Acids; Growth Rate; Nutrients; Eco Stoichiometry; Salt Tolerant Plants.