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- Title
Polyphosphate during the Regreening of Chlorella vulgaris under Nitrogen Deficiency.
- Authors
Fei-Fei Chu; Xiao-Fei Shen; Lam, Paul K. S.; Zeng, Raymond J.
- Abstract
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.
- Subjects
POLYPHOSPHATES; CHLORELLA vulgaris; NITROGEN deficiency; NITRATES; STARVATION; BIOMASS; MICROORGANISMS
- Publication
International Journal of Molecular Sciences, 2015, Vol 16, Issue 10, p23355
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms161023355