Effect of fish steroids 17β-estradiol and 17, 20β-dihydroxy-4-pregnen-3-one on growth, accumulation of pigments, and fatty acid profiles in the microalgae Scenedesmus quadricauda (CPCC-158). (April 2020)

• Record Type: Journal Article
• Authors: Kozlova, Tatiana A.; Hardy, Bruce P.; Levin, David B.
• Is Part Of: Renewable energy. Volume 148(2020)
• Page Start: 798
• Page End: 806
• Publication Date: 2020-04
• Subjects: Fish steroids -- Microalgae growth -- Chlorophyll-a and carotenoid accumulation -- Fatty acid profiles; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2019.10.165
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: The influence of fish steroid hormones on algal ( Scenedesmus quadricauda ) physiology was investigated, as it is relevant to the use of fishery wastewaters for microalgae biomass production. S. quadricauda was exposed to two steroids, 17β-estradiol (E2) and 17, 20, β-dihydroxy-4-pregnen-3-one (17, 20β-P), commonly found in fish farm effluents. These hormones demonstrated stimulatory effects on S. quadricauda cell growth and accumulation of chlorophyll-a, total carotenoids, and lipids. Both steroids promoted total carotenoid accumulation to higher degree than they promoted chlorophyll accumulation. E2 was a more powerful inducer of the accumulation of total carotenoids and lipids compared with 17, 20β-P. The work was conducted to evaluate the possibility of integrating cold-water fish farming with algae production to maximize nutrient recycling in aquaculture wastewaters. Our data suggest that nano-concentrations of fish sex hormones in aquaculture wastewaters could be used to enhance both algae biomass production and the synthesis of high-value molecules. Highlights: Scenedesmus quadricauda was exposed to two fish steroid hormones. The fish steroid hormones stimulated S. quadricauda cell growth. Accumulation of chlorophyll-a and total carotenoids were also stimulated. The fish steroid hormones alternated lipid fatty acid profiles. The steroids from fishery effluents are promising stimulants for biofuel production.