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16. NMR Metabolomics as an Effective Tool To Unravel the Effect of Light Intensity and Temperature on the Composition of the Marine Microalgae Isochrysis galbana.

Author

Aguilera-Sáez LM, Abreu AC, Camacho-Rodríguez J, González-López CV, Del Carmen Cerón-García M, and Fernández I

Subjects
Amino Acids chemistry, Amino Acids metabolism, Chlorophyll A chemistry, Chlorophyll A metabolism, Fatty Acids chemistry, Fatty Acids metabolism, Fatty Acids, Unsaturated, Haptophyta metabolism, Microalgae metabolism, Temperature, Haptophyta chemistry, Haptophyta radiation effects, Magnetic Resonance Spectroscopy methods, Metabolomics methods, Microalgae chemistry, Microalgae radiation effects
Abstract

NMR spectroscopy coupled with multivariate data analysis techniques was applied to obtain meaningful information about nontargeted metabolic changes on  Isochrysis galbana upon acclimation to different environmental conditions at indoor lab-scale. The effects of temperature (from 15 to 30 °C) and incident irradiance (from 250 to 1600 μmol m -2 s -1 ) at a constant dilution rate of 0.3 h -1 were evaluated. High irradiances stimulated a decrease of chlorophyll a, fucoxanthin and amino acids content, and the conversion of polar fatty acids (PLs, GLs, DGDGs, SGDGs) to neutral fatty acids (saturated and unsaturated). High temperatures together with high irradiances decreased PUFAs concentration, including omega-3 fatty acids. Under low irradiance and temperature organic osmolytes (homarine, DMSP, GBT, and glycerol), and sugars (glucose, trehalose, and galactose) were also reduced.

Published
2019
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