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Effect of nitrogen concentration on the growth rate and biochemical composition of the microalga, Isochrysis galbana
Open accessAbstract
Nitrogen represents a critical macronutrient that regulates the metabolism and consequently, the growth and biochemical composition of microalgae. In this study, the effect of different nitrogen concentrations (0, 36, 72, 144 and 288 mg/L) on the growth rate and biochemical composition of Isochrysis galbana was investigated. Cell growth, pigments and protein content of I. galbana biomass decreased with diminishing nitrogen concentration; while carbohydrates showed the highest value, 47%, in case of total nitrogen deprivation. Poly unsaturated fatty acids (PUFAs) increased five-fold under sufficient nitrogen concentrations (72 mg/L), compared to nitrogen deprivation. In contrast, concentration of saturated fatty acids (SFAs), 75.79% under nitrogen deprivation, was higher than in case of nitrogen sufficiency, 36.63%. The highest carbohydrate, protein and lipid productivities observed were 156.7, 326.2 and 264.6 mg/L under nitrogen concentrations of 72, 0 and 72 mg/L, respectively. The results of this study indicate that nitrogen concentration significantly affects the growth and biochemical compositions of I. galbana.
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“The maximum nitrogen content in the modified media in the analysed experiments was 0.494 g L− 1 [68, 104], and the minimum was 0 g L− 1 [39].”
From Nitrogen and phosphorus stress as a tool to induce lipid production in microalgae (2023) · cites this paper as [39]
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“Growth in half-strength CF-WW was slow presumably due to nutrient, more specifically nitrogen limitation (Pancha et al. 2014;Zarrinmehr et al. 2020).”
From Quantification of phototrophically grown Galdieria sulphuraria and other microalgae using diphenylamine (2025) · cites this paper as Zarrinmehr et al. 2020
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Metadata
- Authors
- Zarrinmehr, M. J., Farhadian, O., Heyrati, F. P., Keramat, J., Koutra, E., Kornaros, M., & Daneshvar, E.
- Affiliations
- Isfahan University of Technology (IR)
- University of Patras (GR)
- University of Eastern Finland (FI)
- Corresponding author
- Farhadian, Omidvar
- Venue
- Egyptian Journal of Aquatic Research
- Publisher
- Elsevier BV
- Published
- 2020-06
- Volume
- 46
- Issue
- 2
- Pages
- 153-158
- ISSN
- 1687-4285 (ISSN-L)
- OpenAlex
- W2990955573
- Cited by
- 227
- References
- 37
- Citations by year
- 2026: 27 · 2025: 47 · 2024: 44 · 2023: 42 · 2022: 44 · 2021: 20 · 2020: 3
- FWCI
- 3.57
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- The Egyptian Journal of Aquatic Research (publishedVersion, cc-by-nc-nd)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Ministry of Science Research and Technology
- Isfahan University of Technology
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Aquaculture Nutrition and Growth
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Plankton and Biogeochemistry
- Keywords
- Isochrysis galbana, nitrogen content, nitrogen starvation, microalgae growth rate, biochemical composition, pigments, protein content, carbohydrates, polyunsaturated fatty acids, saturated fatty acids, lipid productivity, microalgal biomass
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