Effect of Nitrogen on the Biomass Production and Lipid Accumulation of Micractinium reisseri: A potential Microalgal Strain for Bio-fuel Production

S. Sahay
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Abstract

The potential microalgal strains that are robust and display high growth and lipid accumulation rates are an important prerequisite for using them as a bioenergy source. We have isolated and screened six morphologically different microalgae strains, isolated from the Sabarmati River in Gujarat, India. The growth rates and lipid productivity of all six microalgae were assessed. Three potential microalgae strains were screened based on maximum biomass and lipid production. We named them MA001, MA002 and MA003. We identified MA001 as Micractinium reisseri based on its 28S rRNA sequencing. The M. reisseri showed an optimal growth rate of 2 g/L (dry weight) and 52 % lipid content after 20 days of cultivation in a normal artificial saline medium. Further analysis of lipid accumulation in M. reisseri was investigated at different concentrations of nitrogen. M. reisseri accumulated the highest amount of lipid under nitrogen starvation.
氮对一种潜在的生物燃料生产微藻的生物量生产和脂质积累的影响
具有生长和脂质积累速率高的潜在微藻菌株是将其作为生物能源的重要前提。我们从印度古吉拉特邦的萨巴尔马蒂河分离并筛选了六种形态不同的微藻菌株。测定了6种微藻的生长速率和产脂率。根据最大生物量和产脂量筛选了3个潜在的微藻菌株。我们将它们命名为MA001, MA002和MA003。根据其28S rRNA测序结果,我们鉴定MA001为reisseri微锕。在正常人工盐水培养基中培养20天后,瑞氏芽孢杆菌的最佳生长速率为2 g/L(干重),脂质含量为52%。进一步分析了不同氮浓度下瑞氏m.r isseri的脂质积累。氮饥饿条件下,瑞氏分枝杆菌脂质积累量最高。
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来源期刊
Bioscience Biotechnology Research Communications
Bioscience Biotechnology Research Communications BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
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