Abstract
The growth of marine diatom algaeChaetoceros gracilisandThalassiosira weissflogiiin agricultural fertilizers and additional carbon sources were evaluated. The main objective behind the study was to increase the growth and productivity of the diatom acclimatized under adaptive laboratory culture conditions. In optimized conditions,C.gracilisshowed the highest cell density in NPK (202.5 ± 2.6 × 105 cells mL−1), maximum carbohydrate (212.8 ± 4.0 mg g−1) and protein (133.9 ± 1.5 mg g−1) in urea. In contrast,T.weissflogiishowed the highest cell density in glycerol (148.2 ± 2.5x105 cells mL−1), maximum carbohydrate in glycerol (273.7 ± 3.3 mg g−1), and protein in sucrose (126.2 ± 0.7 mg g−1). Lipid content was maximum in glycerol (73.4 ± 0.6%) and glucose (39.7 ± 0.2%) in C. gracilisand T. weissflogii respectively. Increased pigment production and chrysolaminarin concentration were obtained in both marine species. The study highlights the importance of adaptive laboratory evolution as an promising tool in enhancing productivity in diatom algae.
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