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首页> 外文期刊>Brazilian Journal of Microbiology >Growth and content of Spirulina platensis biomass chlorophyll cultivated at different values of light intensity and temperature using different nitrogen sources
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Growth and content of Spirulina platensis biomass chlorophyll cultivated at different values of light intensity and temperature using different nitrogen sources

机译：不同氮源在不同光强和温度下培养的螺旋藻生物量叶绿素的生长和含量

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摘要

The effects of light intensity and temperature in S. platensis cultivation with potassium nitrate or urea as nitrogen source were investigated, as well as the biomass chlorophyll contents of this cyanobacteria, through the Response Surface Methodology. Experiments were performed at temperatures from 25 to 34.5oC and light intensities from 15 to 69 μmol photons m-2 s-1, in mineral medium. In cultivations with both sources of nitrogen, KNO3 and urea, statistic evaluation through multiple regression, no interactions of such independent variables were detected in the results of the dependent variables maximum cell concentration, chlorophyll biomass contents, cell and chlorophyll productivities, as well as in the nitrogen-cell conversion factor. In cultivation performed with both sources of nitrogen, it was possible to obtain satisfactory adjustments to relate the dependent variables to the independent variables. The best results were achieved at temperature of 30oC, at light intensity of 60 μmol photons m-2s-1, for cell growth, with cell productivity of approximately 95 mg L-1 d-1 in cultivations with urea. For the chlorophyll biomass content, the most adequate light intensity was 24 μmol photons m-2 s-1.
机译：通过响应面法研究了硝酸钾或尿素为氮源的S. platensis培养中光强度和温度的影响，以及该蓝细菌的生物质叶绿素含量。在矿物介质中，温度为25至34.5oC，光强度为15至69μmol光子m-2 s-1。在同时使用氮，KNO3和尿素的栽培中，通过多元回归进行统计评估，在因变量最大细胞浓度，叶绿素生物量含量，细胞和叶绿素生产力以及氮电池转换因子。在使用两种氮源进行的栽培中，都可能获得令人满意的调整，以将因变量与自变量相关联。在30°C的温度下，在60μmol光子m-2s-1的光强度下，对于细胞生长，用尿素培养的细胞生产力约为95 mg L-1 d-1，获得了最佳结果。对于叶绿素生物质含量，最适当的光强度是24μmol光子m-2 s-1。

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