Screening High CO 2 -Tolerant Oleaginous Microalgae from Genera Desmodesmus and Scenedesmus
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Screening High CO2-Tolerant Oleaginous Microalgae from Genera Desmodesmus and Scenedesmus Juan Yang 1,2 & Chunye Zhang 1 & Hanhua Hu 1 Received: 12 February 2020 / Accepted: 23 April 2020/ # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract
Microalgae from genus Scenedesmus sensu lato (including Desmodesmus and Scenedesmus) were reported to be particularly suitable candidates for CO2 biomitigation. In this study, 16 strains from Scenedesmus sensu lato were obtained from different climate zones of China and their phylogenetic positions were determined. Seven strains out of the 16 showed high CO2 tolerance and grew much faster under 20% CO2 than air condition. Two representatives from genera Desmodesmus (NMD46) and Scenedesmus (HBX310) respectively were selected due to their higher lipid productivity, and the maximum value of 146 mg L−1 day−1 was achieved in NMD46. Triacylglycerols increased with the rising of CO2 levels from 0.04 to 15% in NMD46, while they changed little in HBX310. High CO2 level decreased the polyunsaturated fatty acid content in NMD46 but increased it in HBX310. NMD46 is more suitable for standardized biodiesel production in view of its lipid and fatty acid composition responses to high CO2. Keywords Desmodesmus . Scenedesmus . High CO2 . Triacylglycerol . Lipid production
Publication record of Juan Yang https://sciencedirect.xilesou.top/science/article/pii/S2211926416300431 http://www.plantcell.org/content/26/4/1681.short https://onlinelibrary.wiley.xilesou.top/doi/abs/10.1111/tpj.13411 https://royalsocietypublishing.org/doi/full/10.1098/rstb.2016.0409 Publication record of Chunye Zhang https://sciencedirect.xilesou.top/science/article/abs/pii/S1874778713000597 Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12010-02003319-5) contains supplementary material, which is available to authorized users.
* Hanhua Hu [email protected]
1
Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
Applied Biochemistry and Biotechnology
Introduction The increase in CO2 emissions, which derive from the combustion of fossil fuels, is one of the causes of the global warming [1]. During the past three decades, many countries and regions around the world established targets to seek new energy in view of environmental protection, such as nuclear energy, solar energy, and biofuels. Biofuels as economically feasible and environmentally sustainable fuels have attracted extensive attention [2]. Microalgae as the third-generation biofuels are considered to be the most promising feedstocks for biofuels compared with the first generation biofuels (such as crop oils) and the second generation biofuels (such as lignocellulosic agriculture). Microalgae can convert CO2 and other supplementary nutrients into biomass via photosynthesis more efficiently [3, 4]. Furthermore, microalgae grow in freshwater, seawater, or even wastew
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