Enhancing microalgal biomass productivity by engineering a microalgal-bacterial community
Enhancing microalgal biomass productivity by engineering a microalgal-bacterial community
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DOI：
10.1016/j.biortech.2014.10.159
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发表时间：
2015-01-01
影响因子：
11.4
通讯作者：
Kim, Hee-Sik
中科院分区：
文献类型：
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作者：
Cho, Dae-Hyun;Ramanan, Rishiram;Kim, Hee-Sik
本研究表明，生态工程菌群可以通过碳交换提高微藻生物量和脂质生产力。藻圈细菌多样性分析，在xenic小球藻（XCV）证实存在的生长促进和抑制微生物。无菌C.结果表明，ACV与4种不同的生长促进菌具有共生关系。由这4种细菌组成的人工微藻-细菌复合体（AMBC）对ACV的生长有显著的促进作用（P < 0.05）。此外，AMBC还具有上级的絮凝效率、油脂含量和品质。碳交换的研究表明，AMBC中的细菌可能利用微藻释放的固定有机碳，并反过来提供影响藻类生长和代谢的无机碳和低分子量（LMW）有机碳。这种交换虽然是物种特有的，但在碳循环中具有巨大的意义，可以被微藻生物技术产业利用。(C)2014爱思唯尔有限公司版权所有。
This study demonstrates that ecologically engineered bacterial consortium could enhance microalgal biomass and lipid productivities through carbon exchange. Phycosphere bacterial diversity analysis in xenic Chlorella vulgaris (XCV) confirmed the presence of growth enhancing and inhibiting microorganisms. Co-cultivation of axenic C. vulgaris (ACV) with four different growth enhancing bacteria revealed a symbiotic relationship with each bacterium. An artificial microalgal-bacterial consortium (AMBC) constituting these four bacteria and ACV showed that the bacterial consortium exerted a statistically significant (P < 0.05) growth enhancement on ACV. Moreover, AMBC had superior flocculation efficiency, lipid content and quality. Studies on carbon exchange revealed that bacteria in AMBC might utilize fixed organic carbon released by microalgae, and in return, supply inorganic and low molecular weight (LMW) organic carbon influencing algal growth and metabolism. Such exchanges, although species specific, have enormous significance in carbon cycle and can be exploitated by microalgal biotechnology industry. (C) 2014 Elsevier Ltd. All rights reserved.