Enhancing microalgal biomass productivity by engineering a microalgal–bacterial community

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 microorgan...

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Vydáno v:	Bioresource technology Ročník 175; s. 578 - 585
Hlavní autoři:	Cho, Dae-Hyun, Ramanan, Rishiram, Heo, Jina, Lee, Jimin, Kim, Byung-Hyuk, Oh, Hee-Mock, Kim, Hee-Sik
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	England 01.01.2015
Témata:	Bacteria Bacteria - genetics Bacteria - metabolism Biomass biomass production Biotechnology Biotechnology - methods Carbon Carbon - metabolism carbon cycle Chlorella vulgaris Chlorella vulgaris - growth & development Chlorella vulgaris - metabolism Chlorella vulgaris - microbiology coculture Consortia engineering Exchange Flocculation lipid content Lipid Metabolism Lipids Lipids - chemistry metabolism microalgae Microalgae - growth & development Microalgae - metabolism Microalgae - microbiology Microbial Consortia - genetics Microbial Consortia - physiology molecular weight Productivity Symbiosis Artificial microalgal bacterial community Phycosphere bacteria Biodiesel Growth enhancement Chlorella vulgaris
ISSN:	0960-8524, 1873-2976, 1873-2976
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Abstract	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.
AbstractList	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. 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.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.
Author	Cho, Dae-Hyun Ramanan, Rishiram Lee, Jimin Kim, Byung-Hyuk Oh, Hee-Mock Kim, Hee-Sik Heo, Jina
Author_xml	– sequence: 1 givenname: Dae-Hyun surname: Cho fullname: Cho, Dae-Hyun – sequence: 2 givenname: Rishiram surname: Ramanan fullname: Ramanan, Rishiram – sequence: 3 givenname: Jina surname: Heo fullname: Heo, Jina – sequence: 4 givenname: Jimin surname: Lee fullname: Lee, Jimin – sequence: 5 givenname: Byung-Hyuk surname: Kim fullname: Kim, Byung-Hyuk – sequence: 6 givenname: Hee-Mock surname: Oh fullname: Oh, Hee-Mock – sequence: 7 givenname: Hee-Sik surname: Kim fullname: Kim, Hee-Sik
BackLink	https://www.ncbi.nlm.nih.gov/pubmed/25459870$$D View this record in MEDLINE/PubMed
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Keywords	Artificial microalgal bacterial community Phycosphere bacteria Biodiesel Growth enhancement Chlorella vulgaris
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Snippet	This study demonstrates that ecologically engineered bacterial consortium could enhance microalgal biomass and lipid productivities through carbon exchange....
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SubjectTerms	Bacteria Bacteria - genetics Bacteria - metabolism Biomass biomass production Biotechnology Biotechnology - methods Carbon Carbon - metabolism carbon cycle Chlorella vulgaris Chlorella vulgaris - growth & development Chlorella vulgaris - metabolism Chlorella vulgaris - microbiology coculture Consortia engineering Exchange Flocculation lipid content Lipid Metabolism Lipids Lipids - chemistry metabolism microalgae Microalgae - growth & development Microalgae - metabolism Microalgae - microbiology Microbial Consortia - genetics Microbial Consortia - physiology molecular weight Productivity Symbiosis
Title	Enhancing microalgal biomass productivity by engineering a microalgal–bacterial community
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