Enhancement of lipid accumulation in Monoraphidium sp. QLY-1 by induction of strigolactone. (September 2019)

• Record Type: Journal Article
• Authors: Song, Xueting; Zhao, Yongteng; Li, Tao; Han, Benyong; Zhao, Peng; Xu, Jun-Wei; Yu, Xuya
• Is Part Of: Bioresource technology. Volume 288(2019)
• Publication Date: 2019-09
• Subjects: Microalgae -- Monoraphidium sp. QLY-1 -- Lipid -- Strigolactone -- Calcium -- Nitric oxide; 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.2019.121607
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Strigolactone (SL) significantly increased the lipid productivity of alga. SL triggered an increase in the levels of cytosolic Ca 2+ and nitric oxide (NO). Ca 2+ prompted biomass and lipid productivity in alga under SL induction. Ca 2+ regulated NO signalling in alga in response to SL induction. Abstract: In this study, the effects of strigolactone (SL) on the biomass, lipid content, biochemical properties, and gene transcription of Monoraphidium sp. QLY-1 were examined. The lipid content and lipid productivity increased by 61% and 55% in QLY-1 under 1 μM SL induction compared to the control group, respectively. SL also upregulated the levels of endogenous NO and Ca 2+ and lipid biosynthesis gene transcription. Subsequently, the relationship between Ca 2+ and nitric oxide (NO) in the regulation of cell growth and lipid accumulation of QLY-1 under SL induction conditions was analysed. An increase in endogenous Ca 2+ regulated cell growth and lipid biosynthesis by modulating the levels of NO and lipid biosynthesis-related gene expression. Collectively, this study provided a valuable approach for biofuel production from microalgae under SL induction and demonstrated that there is crucial crosstalk between the Ca 2+ and NO signalling in the manipulation of lipid biosynthesis in microalgae under SL treatment.