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The effect of carbon dioxide rich environment on carbonic anhydrase activity, growth and metabolite production in indigenous freshwater microalgae

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Relation http://ir.cftri.com/12387/
http://dx.doi.org/10.1016/j.algal.2015.02.014
 
Title The effect of carbon dioxide rich environment on carbonic anhydrase
activity, growth and metabolite production in indigenous
freshwater microalgae
 
Creator Swarnalatha, G. V.
Namratha, S. Hegde
Chauhan, V. S.
Sarada, R.
 
Subject 01 Algae
 
Description Indigenous freshwater microalgae from natural habitats may have potential for bio-mitigation of atmospheric
CO2. The present study evaluates the response of three indigenous microalgal isolates viz., Desmodesmus sp.,
Kirchneriella sp. and Acutodesmus sp., to CO2 rich environment (10, 20 and 30%) in a closed photobioreactor. In
a time course study, levels of CO2 in culture medium were observed to modulate the activity of carbonic
anhydrase (CA), a key enzyme of carbon concentrating mechanism (CCM) of microalgae. The CA activity decreased
on availability of free CO2 and increased on depletion of free CO2 in the culture medium. Maintenance
of algal cultures in CO2 rich environment for a period of 16 days enhanced the biomass concentration, specific
growth rate, chlorophyll and carbon dioxide biofixation rate by 2–4 fold. Overall productivity, carbon, carotenoid
and lipid contents also increased. Palmitic and oleic acids were the major fatty acids of the algal lipids. CO2 rich
environment affected the fatty acid profile in Desmodesmus sp. with an increase in unsaturated fatty acids.
 
Date 2015
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://ir.cftri.com/12387/1/Algal%20Research%209%20%282015%29%20151%E2%80%93159.pdf
Swarnalatha, G. V. and Namratha, S. Hegde and Chauhan, V. S. and Sarada, R. (2015) The effect of carbon dioxide rich environment on carbonic anhydrase activity, growth and metabolite production in indigenous freshwater microalgae. Algal Research, 9. pp. 151-159.