氮胁迫引发了微藻 Scenedesmus sp. CCNM 1077 的生化和形态变化。
Nitrogen stress triggered biochemical and morphological changes in the microalgae Scenedesmus sp. CCNM 1077.
机构信息
Discipline of Salt & Marine Chemicals, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India.
Discipline of Salt & Marine Chemicals, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India.
出版信息
Bioresour Technol. 2014 Mar;156:146-54. doi: 10.1016/j.biortech.2014.01.025. Epub 2014 Jan 17.
The aim of present study was to investigate the effects of nitrogen limitation as well as sequential nitrogen starvation on morphological and biochemical changes in Scenedesmus sp. CCNM 1077. The results revealed that the nitrogen limitation and sequential nitrogen starvation conditions significantly decreases the photosynthetic activity as well as crude protein content in the organism, while dry cell weight and biomass productivity are largely unaffected up to nitrate concentration of about 30.87mg/L and 3 days nitrate limitation condition. Nitrate stress was found to have a significant effect on cell morphology of Scenedesmus sp. CCNM 1077. Total removal of nitrate from the growth medium resulted in highest lipid (27.93%) and carbohydrate content (45.74%), making it a potential feed stock for biodiesel and bio-ethanol production. This is a unique approach to understand morphological and biochemical changes in freshwater microalgae under nitrate limitation as well as sequential nitrate removal conditions.
本研究旨在探讨氮限制以及连续氮饥饿对小球藻 CCNM 1077 形态和生化变化的影响。结果表明，氮限制和连续氮饥饿条件显著降低了生物体的光合作用活性和粗蛋白含量，而在硝酸盐浓度约为 30.87mg/L 和 3 天的硝酸盐限制条件下，干细胞重量和生物量生产力基本不受影响。硝酸盐胁迫对小球藻 CCNM 1077 的细胞形态有显著影响。从生长培养基中完全去除硝酸盐可获得最高的脂质（27.93%）和碳水化合物含量（45.74%），使其成为生物柴油和生物乙醇生产的潜在原料。这是一种独特的方法，可以了解淡水微藻在硝酸盐限制以及连续硝酸盐去除条件下的形态和生化变化。
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