Regulation of the pigment optical density of an algal cell: Filling the gap between photosynthetic productivity in the laboratory and in mass culture
Regulation of the pigment optical density of an algal cell: Filling the gap between photosynthetic productivity in the laboratory and in mass culture
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DOI：
10.1016/j.jbiotec.2012.02.021
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发表时间：
2012-11-30
影响因子：
4.1
通讯作者：
Bassi, Roberto
中科院分区：
文献类型：
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作者：
Formighieri, Cinzia;Franck, Fabrice;Bassi, Roberto
越来越多的投资者正在将藻类视为一种可行的生物燃料来源，除了用于人/动物饲料或提取高价值化学品和药物的种植。然而，目前的生物质生产率远远低于理论估计，这意味着可用光合作用有效辐射的很大一部分没有用于光合作用。由于野生型菌株的高色素光密度，大规模培养中的光利用效率低下和快速光衰减被认为是降低太阳能到生物质转换效率的主要限制因素。分析由诱变或基因工程产生的捕光天线减少和/或每细胞总色素浓度降低的突变体的生长产量，有助于理解光生物反应器中生物量积累的限制因素。同时，关于光驯化的研究可以提供关于光生物反应器中藻细胞平均状态的额外信息，用于基于模型的预测。确定太阳能到生物质转化效率的限制因素是规划藻类遗传改良和驯化战略的第一步，最终填补理论和工业光合作用生产率之间的差距。(C)2012爱思唯尔B.V.保留所有权利。
An increasing number of investors is looking at algae as a viable source of biofuels, beside cultivation for human/animal feeding or to extract high-value chemicals and pharmaceuticals. However, present biomass productivities are far below theoretical estimations implying that a large part of the available photosynthetically active radiation is not used in photosynthesis. Light utilisation inefficiency and rapid light attenuation within a mass culture due to high pigment optical density of wild type strains have been proposed as major limiting factors reducing solar-to-biomass conversion efficiency. Analysis of growth yields of mutants with reduced light-harvesting antennae and/or reduced overall pigment concentration per cell, generated by either mutagenesis or genetic engineering, could help understanding limiting factors for biomass accumulation in photobioreactor. Meanwhile, studies on photo-acclimation can provide additional information on the average status of algal cells in a photobioreactor to be used in modelling-based predictions. Identifying limiting factors in solar-to-biomass conversion efficiency is the first step for planning strategies of genetic improvement and domestication of algae to finally fill the gap between theoretical and industrial photosynthetic productivity. (C) 2012 Elsevier B.V. All rights reserved.