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首页> 外文期刊>Phycologia >A comparison of photoautotrophic, heterotrophic, and mixotrophic growth for biomass production by the green alga Scenedesmus sp (Chlorophyceae)
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A comparison of photoautotrophic, heterotrophic, and mixotrophic growth for biomass production by the green alga Scenedesmus sp (Chlorophyceae)

机译：绿藻生物质生产的光摄逸，异养和混纺营养生长的比较（叶绿素）

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Substantial research has been devoted to testing the potential for algal-derived biofuels. However, because of the high cost and low biomass productivity of algal mass culture, this is not yet a commercial reality. Most research has focused on optimizing photoautotrophic cultivation of algal biomass. Other modes of growing algae such as heterotrophy and mixotrophy need to be investigated. Our objective was to compare the biomass productivity and the macromolecular pools of Scenedesmus sp. grown under photoautotrophic and heterotrophic conditions, and to expose the heterotrophic cultures to light after their growth slowed or ceased. We found that heterotrophy led to larger cells, faster growth rates, and denser cultures than photoautotrophically grown cultures. Exposing heterotrophically growing cells to light caused an immediate significant boost to growth rates and biomass production. As a result, biomass obtained through this process (mixotrophy) was double that of heterotrophically grown cultures, and three times greater than with photosynthetically grown cultures. Higher cellular carbohydrates and proteins were observed in mixotrophic cultures than in photoautotrophic ones. Despite these cellular changes, overall biomass and lipid productivity can be ranked as follows: mixotrophy heterotrophy photoautotrophy. This study provides promising leads for the use of molasses in algal biomass cultivation.
机译：实质性研究已经致力于测试藻类生物燃料的潜力。然而，由于藻类质量培养的高成本和低生物量生产率，这不是商业现实。大多数研究都集中在优化藻类生物量的光学营养培养。需要研究其他生长藻类的其他模式，例如异营养和混纺萎缩。我们的目标是将生物质化生产率和Scenedesmus Sp的大分子池进行比较。在光拍营养和异养的条件下生长，并在其生长缓慢或停止后暴露异养培养物。我们发现异营养不良导致更大的细胞，更快的增长率和更密集的培养物而不是光学繁殖的培养物。将杂鸽生长细胞暴露在光线下引起了直接促进的增长率和生物质生产。结果，通过该过程（混纺）获得的生物质是异术式生长培养物的两倍，比用光合生长的培养物大的三倍。在混合营养培养物中观察到比光学营养学培养物更高的细胞碳水化合物和蛋白质。尽管这些细胞变化，但总体生物质和脂质生产率可以排序如下：混纺术和GT;异技＆ photoAutotrophy。本研究提供了有希望的岩浆生物量培养中使用糖蜜的引线。

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