Growth stimulation and synthesis of lipids, pigments and antioxidants with magnetic fields in Chlorella kessleri cultivations

• Published in: Bioresource technology 2017-11, Vol.244 (Pt 2), p.1425-1432
• Main Authors: Bauer, Lenon Medeiros, Costa, Jorge Alberto Vieira, da Rosa, Ana Priscila Centeno, Santos, Lucielen Oliveira
• Format: Article
• Language: English
• Subjects: Antioxidant activity; Antioxidants; Biomass; Biostimulation; Carotenoids; Chlorella; Chlorophyll; Chlorophylls; Lipids; Magnetic Fields; Microalgae
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2017.06.036

•Magnetic fields (MF) stimulate cell growth and biocompounds synthesis in C. kessleri.•The effect of MF in C. kessleri are dependent on specific intensities and exposure times.•MF of 60mT is economical tool ($ 7), making it viable biocompounds production of microalgal origin.•The stimulation in cell growth indicates effect hormetic of MF on cells. This study aimed at applying different intensities (30 and 60mT) and exposure times (24 and 1hd−1) of MF to cultures of Chlorella kessleri and evaluated their effects on cell growth, proximate composition of biomass, pigment production and antioxidant activity. The condition of 60mT for 1hd−1 stimulated biomass concentration of 83.2% by comparison with control culture (CC). Besides stimulated 13.7% lipid synthesis, 38.9% chlorophyll a and 59.1% chlorophyll b, 25.0% total carotenoids and antioxidants up to 185.7%. Thus MF application is an excellent alternative to stimulate cell growth and high biotechnological interest biocompounds.