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Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency

Polyphosphate (Poly-P) accumulation has been reported in Chlorella vulgaris under nitrogen deficiency conditions with sufficient P supply, and the process has been demonstrated to have great impact on lipid productivity. In this article, the utilization of polyphosphates and the regreening process u...

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Autores principales: Chu, Fei-Fei, Shen, Xiao-Fei, Lam, Paul K. S., Zeng, Raymond J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4632702/
https://www.ncbi.nlm.nih.gov/pubmed/26426008
http://dx.doi.org/10.3390/ijms161023355
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author Chu, Fei-Fei
Shen, Xiao-Fei
Lam, Paul K. S.
Zeng, Raymond J.
author_facet Chu, Fei-Fei
Shen, Xiao-Fei
Lam, Paul K. S.
Zeng, Raymond J.
author_sort Chu, Fei-Fei
collection PubMed
description Polyphosphate (Poly-P) accumulation has been reported in Chlorella vulgaris under nitrogen deficiency conditions with sufficient P supply, and the process has been demonstrated to have great impact on lipid productivity. In this article, the utilization of polyphosphates and the regreening process under N resupplying conditions, especially for lipid production reviving, were investigated. This regreening process was completed within approximately 3–5 days. Polyphosphates were first degraded within 3 days in the regreening process, with and without an external P supply, and the degradation preceded the assimilation of phosphate in the media with an external P offering. Nitrate assimilation was markedly influenced by the starvation of P after polyphosphates were exhausted in the medium without external phosphates, and then the reviving process of biomass and lipid production was strictly impeded. It is, thus, reasonable to assume that simultaneous provision of external N and P is essential for overall biodiesel production revival during the regreening process.
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spelling pubmed-46327022015-11-23 Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency Chu, Fei-Fei Shen, Xiao-Fei Lam, Paul K. S. Zeng, Raymond J. Int J Mol Sci Article Polyphosphate (Poly-P) accumulation has been reported in Chlorella vulgaris under nitrogen deficiency conditions with sufficient P supply, and the process has been demonstrated to have great impact on lipid productivity. In this article, the utilization of polyphosphates and the regreening process under N resupplying conditions, especially for lipid production reviving, were investigated. This regreening process was completed within approximately 3–5 days. Polyphosphates were first degraded within 3 days in the regreening process, with and without an external P supply, and the degradation preceded the assimilation of phosphate in the media with an external P offering. Nitrate assimilation was markedly influenced by the starvation of P after polyphosphates were exhausted in the medium without external phosphates, and then the reviving process of biomass and lipid production was strictly impeded. It is, thus, reasonable to assume that simultaneous provision of external N and P is essential for overall biodiesel production revival during the regreening process. MDPI 2015-09-28 /pmc/articles/PMC4632702/ /pubmed/26426008 http://dx.doi.org/10.3390/ijms161023355 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chu, Fei-Fei
Shen, Xiao-Fei
Lam, Paul K. S.
Zeng, Raymond J.
Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency
title Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency
title_full Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency
title_fullStr Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency
title_full_unstemmed Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency
title_short Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency
title_sort polyphosphate during the regreening of chlorella vulgaris under nitrogen deficiency
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4632702/
https://www.ncbi.nlm.nih.gov/pubmed/26426008
http://dx.doi.org/10.3390/ijms161023355
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