title: A strategy for promoting lipid production in green microalgae Monoraphidium sp. QLY-1 by combined melatonin and photoinduction.
abstract: Microalgae lipids are potential candidates for the production of renewable biodiesel. The combination of plant hormones and two-step cultivation regulates lipid production in microalgae. A strategy for promoting lipid accumulation in Monoraphidium sp. QLY-1 by combining exogenous melatonin (MT) and photoinduction was developed. The effects of melatonin on the lipid content, reactive oxygen species (ROS), and activities of three key fatty acid biosynthetic enzyme in Monoraphidium sp. QLY-1 were investigated. The lipid content increased by 1.32-fold under 1μM melatonin treatment. The maximum lipid content achieved was 49.6%. However, the protein and carbohydrate contents decreased rapidly from 57.21% to 47.96% and from 53.4% to 37.71%, respectively. Biochemical and physiological analyses suggested that the ROS and lipid biosynthesis-related enzyme activities correlated with increased lipid accumulation under photo-melatonin induction conditions.
authors.affiliation: Faculty of Life Sciences and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Dafei
authors.initials: D
authors.lastname: Li
authors.affiliation: Faculty of Life Sciences and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Yongteng
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Faculty of Life Sciences and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Ding
authors.affiliation: Faculty of Life Sciences and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhao
authors.affiliation: Faculty of Life Sciences and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Jun-Wei
authors.initials: JW
authors.lastname: Xu
authors.affiliation: Faculty of Life Sciences and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.affiliation: School of Foreign Languages, Kunming University, Kunming 650200, China.
authors.forename: Huixian
authors.initials: H
authors.lastname: Ma
authors.affiliation: Faculty of Life Sciences and Technology, Kunming University of Science and Technology, Kunming 650500, China. Electronic address: xuya_yu@163.com.
authors.forename: Xuya
authors.initials: X
authors.lastname: Yu
mesh_terms: D018533:Biomass; D000460:Chlorophyta / Q000378:metabolism; D008055:Lipids / Q000096:biosynthesis; D008550:Melatonin; D058086:Microalgae / Q000378:metabolism*
chemical_list: D008055:Lipids; D008550:Melatonin
keywords: Lipid; Melatonin; Monoraphidium sp. QLY-1; Photoinduction