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Coordinated response of photosynthesis, carbon assimilation, and triacylglycerol accumulation to nitrogen starvation in the marine microalgae Isochrysis zhangjiangensis (Haptophyta).
- Source :
-
Bioresource technology [Bioresour Technol] 2015 Feb; Vol. 177, pp. 282-8. Date of Electronic Publication: 2014 Nov 15. - Publication Year :
- 2015
-
Abstract
- The photosynthetic performance, carbon assimilation, and triacylglycerol accumulation of Isochrysis zhangjiangensis under nitrogen-deplete conditions were studied to understand the intrinsic correlations between them. The nitrogen-deplete period was divided into two stages based on the photosynthetic parameters. During the first stage, carbon assimilation was not reduced compared with that under favorable conditions. The marked increase in triacylglycerols and the variation in the fatty acid profile suggested that triacylglycerols were mainly derived from de novo synthesized acyl groups. In the second stage, the triacylglycerol content continued increasing while the carbohydrate content decreased from 44.0% to 26.3%. These results indicated that the intracellular conversion of carbohydrates to triacylglycerols occurred. Thus, we propose that sustainable carbon assimilation and incremental triacylglycerol production can be achieved by supplying appropriate amounts of nitrogen in medium to protect the photosynthetic process from severe damage using the photosynthetic parameters as indicators.<br /> (Copyright © 2014 Elsevier Ltd. All rights reserved.)
- Subjects :
- Aquatic Organisms drug effects
Biomass
Carbon Cycle drug effects
Carbon Dioxide metabolism
Fatty Acids metabolism
Haptophyta cytology
Haptophyta drug effects
Haptophyta growth & development
Microalgae cytology
Microalgae drug effects
Microalgae growth & development
Photosystem II Protein Complex metabolism
Aquatic Organisms metabolism
Carbon metabolism
Haptophyta metabolism
Microalgae metabolism
Nitrogen pharmacology
Photosynthesis drug effects
Triglycerides metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 177
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 25496949
- Full Text :
- https://doi.org/10.1016/j.biortech.2014.11.028