Journal
JOURNAL OF APPLIED PHYCOLOGY
Volume 28, Issue 6, Pages 3283-3294Publisher
SPRINGER
DOI: 10.1007/s10811-016-0899-z
Keywords
Haematococcus pluvialis; Triacylglycerides; Phytosterols; Biological activity
Funding
- Universidad Nacional del Sur, Argentina [PGI 24/B196, PGI 24/B179]
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT) [PICT 2013-0987, PICT 2014-0893]
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The main aim of this work was to describe the effect of light-induced stress on bioactive lipid accumulation in Haematococcus pluvialis CCALA 1081. To this end, the lipid profile was analyzed in order to determine triacylglyceride (TAG) and phytosterol content, the fatty acid profile of TAGs and the composition of the sterol fraction. After 3 days of light-induced stress, the content of both bioactive lipids significantly increased compared to controls. Palmitic, linoleic, and alpha linolenic fatty acid content was higher whereas caproic acid content diminished in H. pluvialis under stress. High irradiance also reduced beta-sitosterol content whereas chlerosterol, brassicasterol, and Delta 7-campesterol content was higher in the phytosterol fraction. No significant levels of lipid peroxidation were detected after 3 days of light-induced stress. In addition, H. pluvialis phytosterols displayed radical scavenging capacity and also a cytotoxic effect associated with the induction of apoptosis in human IMR-32 neuroblastoma cells. Our results show that high light stress induced the accumulation of commercially valuable compounds in H. pluvialis that are of potential benefit to human health.
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