title: Effect of high-temperature stress on microalgae at the end of the logarithmic phase for the efficient production of lipid.
abstract: Efficient production of microalgae lipid is significant for the production of renewable biodiesel. In the present study, the high temperature of 40°C as stress environment was tested for stimulating lipid accumulation after the microalgae (Scenedesmus quadricauda) cells in suitable conditions grew to the end of the logarithmic phase. Different stress cultivation times of 1, 2, 3, 4, 5 and 6 days were studied. Interestingly, the lipid content and productivity reached 33.5% and 23.2 mg/L d after one day stress cultivation, showing substantial improvements of 39.6% and 33.3% compared with that in the untreated (day 0) microalgae cells, respectively. Longer stress time led to the decrease of biomass and lipid content compared with the untreated microalgae. However, a maximum protein content of 58.7% was obtained after six days. The stress cultivation at the end of the microalgae exponential phase for one day at a high temperature of 40°C could be a very useful industrial approach for efficiently promoting lipid content and biodiesel production.
authors.affiliation: a School of Environmental Science and Engineering , Shandong University , Jinan , People's Republic of China.
authors.forename: Fei
authors.initials: F
authors.lastname: Han
authors.affiliation: a School of Environmental Science and Engineering , Shandong University , Jinan , People's Republic of China.|b Shandong Provincial Engineering Centre on Environmental Science and Technology , Jinan , People's Republic of China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Pei
authors.affiliation: a School of Environmental Science and Engineering , Shandong University , Jinan , People's Republic of China.|b Shandong Provincial Engineering Centre on Environmental Science and Technology , Jinan , People's Republic of China.
authors.forename: Wenrong
authors.initials: W
authors.lastname: Hu
authors.affiliation: a School of Environmental Science and Engineering , Shandong University , Jinan , People's Republic of China.
authors.forename: Lin
authors.initials: L
authors.lastname: Han
authors.affiliation: a School of Environmental Science and Engineering , Shandong University , Jinan , People's Republic of China.
authors.forename: Shuo
authors.initials: S
authors.lastname: Zhang
authors.affiliation: a School of Environmental Science and Engineering , Shandong University , Jinan , People's Republic of China.
authors.forename: Guixia
authors.initials: G
authors.lastname: Ma
mesh_terms: D018533:Biomass; D005227:Fatty Acids / Q000737:chemistry / Q000378:metabolism; D006358:Hot Temperature; D050356:Lipid Metabolism / Q000502:physiology*; D058086:Microalgae / Q000737:chemistry / Q000378:metabolism; D058433:Photobioreactors
chemical_list: D005227:Fatty Acids
keywords: High temperature; biomass; lipid accumulation; logarithmic phase; stress cultivation