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Pigment production in Spirulina fussiformis in different photophysical condition's

机译：螺旋藻在不​​同光物理条件下的色素生产

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摘要

The present investigation makes a comparative investigation of individual light source on the different commercially important pigments in Spirulina fussiformis in photobioreactor culture condition. Continuous culture system was carried out throughout the experimental condition. Initially, seed culture, corresponding to 0.2 g/L on dry weight basis was cultivated in Zarrouks medium with different colored light source in reactor. Maximum daily biomass productivity, 0.8 g/L, 0.75 g/L and 0.69 g/L in white light (WL), blue light (BL) and green light (GL), respectively, conditions was noticed. Pigment content during WL treatment showed the highest accumulation (5.5 mu g/mL) of chlorophyll whereas, other pigments roughly remained constant without much change, implying WL intensity is better for chlorophyll synthesis. On the other hand, chlorophyll and phycocyanin content gradually increased up to 7 mu g/mL and 2 mg/mL, respectively, at BL intensity. The response to GL was negative to all pigments studied except for phycocyanin; in this case a highest production (2.5 mg/mL) was seen during 18 days experimental period. Additionally, when yellow light (YL) treatment experiments were conducted, the rate of production gradually decreased from 6th day onward in all pigments demonstrating the photobleaching effect of YL. The average rate of pigments production did not show significant accumulation in red light (RL) light treatment except phycoerythrin which showed an increasing trend of production. It is worth to mention here that higher light intensity is better for production of phycocyanin and phycoerythrin in Spirulina. (C) 2007 Elsevier B.V. All rights reserved.
机译：本研究对光生物反应器培养条件下螺旋藻中不同商业重要色素的单个光源进行了比较研究。在整个实验条件下进行连续培养系统。最初，在Zarrouks培养基中用不同颜色的光源在反应器中培养相当于干重0.2 g / L的种子培养物。注意到在白光（WL），蓝光（BL）和绿光（GL）下的最大日生物量生产率分别为0.8 g / L，0.75 g / L和0.69 g / L。 WL处理过程中的颜料含量显示出最高的叶绿素积累（5.5μg / mL），而其他色素大致保持不变，没有太大变化，这表明WL强度更适合叶绿素的合成。另一方面，在BL强度下，叶绿素和藻蓝蛋白含量分别逐渐增加至7μg/ mL和2mg / mL。除藻蓝蛋白外，所有研究的色素对GL的反应均为阴性。在这种情况下，在18天的实验期内观察到最高产量（2.5 mg / mL）。另外，当进行黄光（YL）处理实验时，所有颜料的生产速率从第6天开始逐渐降低，这证明了YL的光致漂白作用。除了藻红蛋白显示出增加的趋势外，在红光（RL）处理中色素的平均产生速率没有显示出明显的积累。在这里值得一提的是，较高的光强度对螺旋藻中藻蓝蛋白和藻红蛋白的生产更为有利。 （C）2007 Elsevier B.V.保留所有权利。

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