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Circadian rhythms in the cell cycle and biomass composition of Neochloris oleoabundans under nitrogen limitation.

Abstract：

:The circadian clock schedules processes in microalgae cells at suitable times in the day/night cycle. To gain knowledge about these biological time schedules, Neochloris oleoabundans was grown under constant light conditions and nitrogen limitation. Under these constant conditions, the only variable was the circadian clock. The results were compared to previous work done under nitrogen-replete conditions, in order to determine the effect of N-limitation on circadian rhythms in the cell cycle and biomass composition of N. oleoabundans. The circadian clock was not affected by nitrogen-limitation, and cell division was timed in the natural night, despite of constant light conditions. However, because of nitrogen-limitation, not the entire population was able to divide every day. Two subpopulations were observed, which divided alternately every other day. This caused oscillations in biomass yield and composition. Starch and total fatty acids (TFA) were accumulated during the day. Also, fatty acid composition changed during the cell cycle. Neutral lipids were built up during the day, especially in cells that were arrested in their cell cycle (G2 and G3). These findings give insight in the influence of circadian rhythms on the cell cycle and biomass composition.

journal_name

J Biotechnol

journal_title

Journal of biotechnology

authors

de Winter L,Schepers LW,Cuaresma M,Barbosa MJ,Martens DE,Wijffels RH

doi

10.1016/j.jbiotec.2014.07.016

subject

Has Abstract

pub_date

2014-10-10 00:00:00

pages

25-33

eissn

0168-1656

issn

1873-4863

pii

S0168-1656(14)00360-5

journal_volume

187

pub_type

杂志文章

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