Production of biomass and lipids by the oleaginous microalgae Monoraphidium sp. QLY-1 through heterotrophic cultivation and photo-chemical modulator induction. (July 2016)

• Record Type: Journal Article
• Authors: Zhao, Yongteng; Li, Dafei; Ding, Ke; Che, Raoqiong; Xu, Jun-Wei; Zhao, Peng; Li, Tao; Ma, Huixian; Yu, Xuya
• Is Part Of: Bioresource technology. Volume 211(2016)
• Page Start: 669
• Page End: 676
• Publication Date: 2016-07
• Subjects: Two-step cultivation -- Monoraphidium sp. QLY-1 -- Lipid induction -- NaCl -- Glycine betaine; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.03.160
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: High biomass and lipid contents were achieved within a short life cycle. Lipid productivity in 5 mM GB-treated samples significantly increased than control. A two-step strategy was developed for algal biomass and lipid production. Abstract: A two-step strategy comprising heterotrophic cultivation and photo-chemical modulator induction was developed to enhance biomass and lipid accumulation in the oleaginous Monoraphidium sp. QLY-1, which was isolated from Qilu Lake in Yunnan Plateau. The algae were first cultivated heterotrophically to achieve high biomass concentration (5.54 g L −1 ) with a lipid content of 22.47%. The cultivated algae were diluted, transferred to light environment, and treated with different chemical elicitors. Results showed that the lipid content increased to 36.68% after 3-day of photoinduction. The lipid content was further enhanced by 1.21, 1.32, and 1.29 folds in algal cells treated with nitrogen deficiency, 20 g L −1 NaCl, and 5 mM glycine betaine, respectively. The maximum lipid content (48.54%) and lipid productivity (121.27 mg L −1 d −1 ) were obtained in treatments with 20 g L −1 NaCl and 5 mM GB, respectively. This study proposes a strategy to efficiently produce lipids by using microalgae.