Journal article
Glycerol and nitrate utilisation by marine microalgae Nannochloropsis salina and Chlorella sp. and associated bacteria during mixotrophic and heterotrophic growth
N Poddar, R Sen, GJO Martin
Algal Research | ELSEVIER SCIENCE BV | Published : 2018
Abstract
Mixotrophic growth is an ability of microalgae to concurrently assimilate CO2 and organic carbon. In the present study, the use of glycerol to enhance microalgal biomass and lipid productivities was investigated in relation to nitrate availability. Under nitrate sufficient conditions, the biomass productivities of Nannochloropsis salina (CCMP 1776) and a marine Chlorella sp. were 1.7 and 1.9 times higher in mixotrophic culture than under strictly photoautotrophic conditions, respectively. Both algae required light to assimilate glycerol. No significant algae growth was observed under heterotrophic conditions, despite apparent utilisation of both nitrate and glycerol. Under nitrate deplete co..
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Funding Acknowledgements
The authors are grateful to the Melbourne-India Postgraduate Programme (MIPP) for supporting this collaborative research between the University of Melbourne (Australia) and the Indian Institute of Technology Kharagpur (India). We are also grateful to the University of Melbourne for a Melbourne International Engagement Award Scholarship for Ms. Poddar. We acknowledge the contribution of Australian Genomic Research Facility (AGRF) in performing the 16S rRNA sequencing. Finally, we acknowledge the excellent contributions of the peer reviewers of the manuscript.