Abstract
The study is focused on the ecological and physiological properties, production, and biochemical characteristics of the diatom Nitzschia amabilis. The optimum salinity (35‒36‰), illumination (2.95 klx), and photoperiod (14 h) at which the highest specific cell growth rate is achieved was determined. The coefficient of light saturation (Ik) was calculated and turned out to be lower than one, which indicates the high energy efficiency of photosynthesis. The results of experiments on salinity showed the ability of the alga to grow in the range of 4–68‰, indicating its relatively broad euryhalinity. The biochemical composition of N. amabilis during acumulative cultivation was studied. In general, polyunsaturated fatty acids predominated in the studied strain; eicosapentaenoic, arachidonic, and docosahexaenoic acids were dominant. The main share of saturated fatty acids consisted of palmitic acid. The productivity indicators of N. amabilis in relation to lipids, fucoxanthin, and PUFAs, which were 2.5–3 times higher in the flow cultivation mode than in the cumulative mode, have been established.
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ACKNOWLEDGMENTS
The authors are grateful to Sergei Ivanovich Genkal, Elena Leonidovna Nevrova, and Rinat Mukhametshaevich Gogorev for their help in determining the species of the strain.
Funding
The work was carried out within the state assignment of the T.I.Vyazemsky Karadag Scientific Station, Nature Reserve of the Russian Academy of Sciences, brunch of A.O.Kovalevsky Institute of Biology of the Southern Seas of the Russian Academy of Sciences, “Study of Fundamental Physical, Physiological-Biochemical, Reproductive, Population, and Behavioral Characteristics of Marine Aquatic Organisms” (no. 121032300019-0). The work used materials from the Scientific and Educational Center for Collective Use of the A.O. Kovalevsky Institute of Biology of the Southern Seas of the Russian Academy of Sciences, “World Ocean Diatoms Collection”. Biochemical analysis was carried out as part of the state task no. 121030300149-0.
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Polyakova, S.L., Zheleznova, S.N., Gevorgiz, R.G. et al. Ecological and Physiological Characteristics and Biotechnological Potential of Diatom Algae Nitzschia amabilis H. Suzuki. Russ J Plant Physiol 70, 165 (2023). https://doi.org/10.1134/S1021443723700309
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DOI: https://doi.org/10.1134/S1021443723700309