Title
Induction of total lipids production in microalgae under nutritional stress
Other title
Inducción de la producción de lípidos totales en microalgas sometidas a estrés nutritivo
Date Issued
01 January 2016
Access level
open access
Resource Type
journal article
Publisher(s)
Universidad Nacional de Colombia
Abstract
The production of total lipids in five microalgal species was induced by absence of nitrogen. The microalgae Ankistrodesmus sp., Ankistrodesmus nannoselene, Chlorella sp., Scenedesmus sp. and Scenedesmus quadricauda were cultured in CHU10 medium with and without nitrogen. They were evaluated during six days. The microalgae density was daily determined by a Neubahuer chamber. The average growth, total biomass and total lipids were also determined. The total lipids were extracted with chloroform: methanol (2:1). The results indicated that species with production greater amount of total lipids were Ankistrodesmus sp. (263.6 mg/g dry biomass), Ankistrodesmus nannoselene (316 mg/g dry biomass) and Scenedesmus sp. (243.3 mg/g dry biomass) when grown in media without nitrogen. Scenedesmus quadricauda and Chlorella sp. when grown in media with nitrogen showed higher amount of dry biomass (159.1 mg/g dry biomass and 221.1 mg/g dry biomass respectively) compared to those which were grown in media without nitrogen. The growth rate was variable between species grown in both conditions. In conclusion, Ankistrodesmus sp. microalgae experienced the highest growth rate (0.77 day-1) in medium without nitrogen. Under the same culture conditions, Scenedesmus sp., had the highest biomass production in dry weight (174.7 mg/l) and Ankistrodesmus nannoselene accumulated the highest percentage of total lipids.
Start page
17
End page
26
Volume
21
Issue
1
Language
Spanish
OCDE Knowledge area
Bioquímica, Biología molecular Biotecnología ambiental
Scopus EID
2-s2.0-84953291530
Source
Acta Biologica Colombiana
ISSN of the container
0120548X
Sources of information: Directorio de Producción Científica Scopus