Different DHA or EPA production responses to nutrient stress in the marine microalga Tisochrysis lutea and the freshwater microalga Monodus subterraneus.

Autor: Hu H; CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China; Anhui Water Conservancy College, Hefei 231603, PR China., Li JY; The First Affiliated Hospital of Anhui University of Traditional Chinese Medicine, Hefei 230031, PR China., Pan XR; CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China., Zhang F; Centre of Wastewater Resource Recovery, College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China., Ma LL; CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China., Wang HJ; CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China; School of Environmental and Chemical Engineering, Anhui Vocational and Technical College, Hefei 230011, PR China., Zeng RJ; CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China; Centre of Wastewater Resource Recovery, College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China. Electronic address: rzeng@ustc.edu.cn.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2019 Mar 15; Vol. 656, pp. 140-149. Date of Electronic Publication: 2018 Nov 24.
DOI: 10.1016/j.scitotenv.2018.11.346
Abstrakt: This study investigated the effect of nitrogen (N) and phosphorous (P) stress on the production of DHA or EPA and total fatty acids (TFAs) in the marine microalga Tisochrysis lutea and the freshwater microalga Monodus subterraneus. Five N or P starvation/limitation conditions (N sufficient and P limited, N sufficient and P starved, N starved and P sufficient, N starved and P limited, and N and P starved) and one N and P sufficient condition (control) were studied. The results demonstrated that the proportion of DHA or EPA among TFAs and production in the microalgae suspensions decreased (57%, 73% for N stress and 18%, 51% for P stress, respectively) under N or P stress in both microalgae compared with the N and P sufficient group. Differently, DHA dry weight content of T. lutea decreased significantly, and EPA dry weight content of M. subterraneus decreased slightly under N starved conditions. Clear differences in TFA content/production and the relationship between TFA and DHA or EPA production/content and CO 2 fixation were observed between the two microalgae. These results give a new sight on the difference between marine microalgae and freshwater microalgae. Meanwhile, it gave a potential application to produce DHA or EPA and TFA combining with CO 2 fixation by these microalgae.
(Copyright © 2018 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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