Maximum-CO2 Tolerance in Microalgae: Possible Mechanisms and Higher lipid Accumulation

Microalgae are belonging to unicellular or simple multicellular photosynthetic microorganisms that have the capability to fix CO2 from various sources, industrial exhaust gases, with the environment and soluble carbonate salts. Unbalanced production of the environment CO2 constitutes a most important challenge to worldwide sustainability. Photoautotrophic algal cultures have the possible to lessen the release of CO2 into the environment by CO2 fixation, helping alleviate the trend toward global warming. Increased CO2 concentration improved significantly the growth rate of the species. In this study, the effects of nitrate feeding on microalgal growth and related CO2 fixation were evaluated, as a affinity to increase carbon fixation. The present study aimed at investigating the mechanisms of carbon dioxide fixation in microalgal cultivation. Biomass composition accessible a prevalence of proteins but also a high amount of lipids. The Rubisco give the high greatest specific reaction rate by the use of high CO2 and (initially) O2-free situation. Photosynthetic equipment state transitions that increase ATP generation, up regulation of H+-ATPase pumping protons out of the cell, shutdown of CO2-concentrating mechanisms, and alteration of membranes’ fatty acid composition are presently assumed to be the key mechanisms leading cellular pH homeostasis and hence microalgae’s tolerance to high CO2 levels. The different percentage of carbon dioxide fixation enhances the higher lipid in the microalgae.