2019
DOI: 10.1590/1678-4324-2019180398
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Influence of High Light Intensity and Nitrate Deprivation on Growth and Biochemical Composition of the Marine Microalgae Isochrysis galbana

Abstract: Isochrysis galbana is a brown microalgae widely used as a feed for marine organism in aquaculture. The aim of present study is to investigate the growth, biochemical composition, fatty acid profile, photosynthetic parameters and antioxidant activity (radical scavenging activity) of Isochrysis galbana cells cultivated under different levels (sub-optimum; 50 ± 1.5,optimum; 125 ± 2.5 and supra-optimum; 325 ± 3.5 µmol photons m-2 s -1) of photosynthetic active radiation (PAR), and subsequently treated with differe… Show more

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Cited by 16 publications
(12 citation statements)
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References 44 publications
(39 reference statements)
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“…Lower lighting results in an increase in the relative content of UFAs [43]. Mishra et al [85] observed in Isochrysis galbana the replacement of the accumulation of one fatty acid group, including myristic 14:0, linoleic 18:2 (LA), α-linolenic 18:3 (ALA), and stearidonic 18:4 (SDA) acids, with a second fatty acid group, including palmitic 16:0, and oleic 18:1 acids, under conditions of nitrogen limitation and high light intensity. In Diacronema lutheri (=Pavlova lutheri), PUFA content, especially EPA, were significantly higher in low light, and levels of SFAs and docosahexaenoic acid (DHA) were significantly higher in bright light [110].…”
Section: Changes In the Amount And Composition Of Fatty Acids In Response To The Action Of Light With Different Intensitiesmentioning
confidence: 99%
See 2 more Smart Citations
“…Lower lighting results in an increase in the relative content of UFAs [43]. Mishra et al [85] observed in Isochrysis galbana the replacement of the accumulation of one fatty acid group, including myristic 14:0, linoleic 18:2 (LA), α-linolenic 18:3 (ALA), and stearidonic 18:4 (SDA) acids, with a second fatty acid group, including palmitic 16:0, and oleic 18:1 acids, under conditions of nitrogen limitation and high light intensity. In Diacronema lutheri (=Pavlova lutheri), PUFA content, especially EPA, were significantly higher in low light, and levels of SFAs and docosahexaenoic acid (DHA) were significantly higher in bright light [110].…”
Section: Changes In the Amount And Composition Of Fatty Acids In Response To The Action Of Light With Different Intensitiesmentioning
confidence: 99%
“…It has been suggested that at high light intensity, microalgal cells use excess energy to produce storage lipids, mainly SFA and MUFA, which are usually involved in the formation of thylakoid membranes, and at low light levels, the PUFA content increases, mainly SDA, EPA, and octadecapentaenoic 18:5 omega-3 acids. The increase in the content of MUFAs (including oleic 18:1 acid) is associated with its central role in the PUFA synthesis system [85]. It is also shown that the active functioning of photosystem I, caused by a change in the light intensity, is accompanied by an increase in omega-3 desaturation of fatty acids.…”
Section: Changes In the Amount And Composition Of Fatty Acids In Response To The Action Of Light With Different Intensitiesmentioning
confidence: 99%
See 1 more Smart Citation
“…Gómez et al [ 52 ] observed that the accumulation of phenolic compounds in some microalgae was independent of the illumination condition. The production of flavonoids and polyphenols could be favored with the adequate control of selected variables of the culture process [ 12 ]. Non-natural factors, such as CuO nanoparticles, can induce the production of phenolics in Nannochloropsis oculata [ 53 ], lowering growth rates as well as chlorophyll and carotenoids content.…”
Section: Marine Phenolics: Sources and Phenolic Compositionmentioning
confidence: 99%
“…The natural production of phenolic compounds in marine organisms has been associated with external factors, particularly with environmental stressing conditions, such as desiccation, salinity, UV radiation, nutrients availability, and temperature [ 2 , 3 , 4 , 5 ]. Variability and dependence with species, seasonality and environmental conditions occur for macroalgae [ 6 , 7 , 8 ] and seagrass [ 9 , 10 , 11 ] and with the growing conditions on microalgae [ 12 ].…”
Section: Introductionmentioning
confidence: 99%