NDLI: Characterization of cell growth and starch production in the marine green microalga Tetraselmis subcordiformis under extracellular phosphorus-deprived and sequentially phosphorus-replete conditions

Content Provider	Springer Nature Link
Author	Yao, Chang Hong Ai, Jiang Ning Cao, Xu Peng Xue, Song
Copyright Year	2013
Abstract	Microalgal starch is a potential feedstock for biofuel production. Nutrient stress is widely used to stimulate starch accumulation in microalgae. Cell growth and starch accumulation in the marine green microalga Tetraselmis subcordiformis were evaluated under extracellular phosphorus deprivation with initial cell densities (ICD) of 1.5, 3.0, 6.0, and 9.0 × 106 cells mL−1. The intracellular stored phosphorus supported cell growth when extracellular phosphorus was absent. The maximum starch content of 44.1 % was achieved in the lowest ICD culture, while the maximum biomass productivity of 0.71 g L−1 day−1, starch concentration of 1.6 g L−1, and starch productivity of 0.30 g L−1 day−1 were all obtained in the culture with the ICD of 3.0 × 106 cells mL−1. Appropriate ICD could be used to regulate the intracellular phosphorus concentration and maintain adequate photosynthetic activity to achieve the highest starch productivity, along with biomass and starch concentration. The recovery of phosphorus-deprived T. subcordiformis in medium containing 0.5, 1.0, or 6.0 mM KH2PO4 was also tested. Cell growth and starch accumulation ability could be recovered completely. A phosphorus pool in T. subcordiformis was shown to manipulate its metabolic activity under different environmental phosphorus availability. Though lower starch productivity and starch content were achieved under phosphorus deprivation compared with nitrogen- or sulfur-deprived conditions, the higher biomass and starch concentration make T. subcordiformis a good candidate for biomass and starch production under extracellular phosphorus deprivation.
Starting Page	6099
Ending Page	6110
Page Count	12
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	97
Issue Number	13
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	2013-05-19
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Tetraselmis subcordiformis Starch Phosphorus Initial cell density Productivity Recovery Biotechnology Microbiology Microbial Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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