Archives in Chemical Research Open Access

Neutral lipids investigation in microalgae strain from desert

9^th Edition of International Conference on Biofuels and Bioenergy

March 29-30, 2018 Edinburgh, Scotland

Lylia Hamel, Daniel Greyzbyk and Douadi Khelifi

Universite of MONTPELLIER, France Universite Constantine, Algeria

Posters & Accepted Abstracts: Arch Chem Res

Abstract:

Drylands cover approximately 40% of Earthâ��s terrestrial biomes supporting one-third of the worldâ��s population. The scale of their importance for biodiversity and ecosystem functioning in desert environments is only just being uncovered. As one of the driest places on Earth, Hoggar Desert is one of places where the Saharan climate is characterized by the longest photoperiod with strong solar irradiation and highest temperature .We collected some of our algae samples to identify some desirable strains for the production of algae-based biofuel, some green and prokaryotic strains were successfully isolated from Algerian sahara freshwaters, and then incubated in closed system of photobioreactors and incubators for the growth and lipids accumulation investigations.The Nile red fluorescence method has been successfully applied to the determination of neutral lipids content . Desmodesmus communis and Synechocystis sp strains showed desirable abilities of accumulating neutral lipid under diurnal 27�°C and 11�° C of dark cycle under (300,900 uE m�¯�² S�¯�¹) fluctuations , The neutral lipid content for acutodesmus obliquuis and carteria crucifera varied of the dry biomass at the end of cultivation while carteria crucifera showed a significant neutral lipids content in the short term after nitrate starvation .The results showed that the growth rate is not constant but increased with a maximum versus continuous temperature 26�°C at (120 uE m�¯�² S�¯�¹) according to this various light intensities (120,300,900 uE m�¯�² S�¯�¹ ) respectively .The results showed that the growth rate is not constant but increased with a maximum versus continuous temperature 26�°C at (120 uE m�¯�² S�¯�¹) . Taking the growth rates and the accumulations of intracellular lipids into the consideration of Carteria Crucifera,Desmodesmus sp,Synechocystis salina ,Acutodesmus obliquus ,strains were considered to have significant potential for biofuel applications. The aim of this study is also seizing the impact of the original climate on the accumulation of the intracellular lipids in microalgae from extreme area lylia.hamel@algaius.info