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Otero, Ana; García, Digna; Fábregas, Jaime

doi:10.1023/a:1007930804367

Cited by 32 publications

(3 citation statements)

References 16 publications

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“…The accumulation of starch and/or lipids reserves is considered a survival mechanism in response to growth-limiting stresses [17], such as UV radiation [79], temperature [80] and shock or nutrient deprivation [81,82], as long as light conditions are present that still allow efficient photosynthesis. For example, during nutritional deprivation (e.g.…”

Section: Induction Of Omega-3 Production In Autotrophic Microalgaementioning

confidence: 99%

Microalgal biofactories: a promising approach towards sustainable omega-3 fatty acid production

et al. 2012

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Omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) provide significant health benefits and this has led to an increased consumption as dietary supplements. Omega-3 fatty acids EPA and DHA are found in animals, transgenic plants, fungi and many microorganisms but are typically extracted from fatty fish, putting additional pressures on global fish stocks. As primary producers, many marine microalgae are rich in EPA (C20:5) and DHA (C22:6) and present a promising source of omega-3 fatty acids. Several heterotrophic microalgae have been used as biofactories for omega-3 fatty acids commercially, but a strong interest in autotrophic microalgae has emerged in recent years as microalgae are being developed as biofuel crops. This paper provides an overview of microalgal biotechnology and production platforms for the development of omega-3 fatty acids EPA and DHA. It refers to implications in current biotechnological uses of microalgae as aquaculture feed and future biofuel crops and explores potential applications of metabolic engineering and selective breeding to accumulate large amounts of omega-3 fatty acids in autotrophic microalgae.

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Section: Induction Of Omega-3 Production In Autotrophic Microalgaementioning

confidence: 99%

Microalgal biofactories: a promising approach towards sustainable omega-3 fatty acid production

et al. 2012

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“…Nevertheless earlier studies (e.g. Grima et al 1995;Otero et al 1997;Carvalho and Malcata 2005;Huerlimann et al 2010) addressing the potential for EPA/DHA mass production focused primarily on warm (temperate) species. Although, in general, cultivation under high irradiance and temperature conditions will lead to higher growth rates (Raven and Geider 1988;Geider et al 1998), this may not be optimal for LC-PUFA productivity.…”

Section: Introductionmentioning

confidence: 99%

On the potential application of polar and temperate marine microalgae for EPA and DHA production

et al. 2013

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Long chain polyunsaturated fatty acids (LC-PUFAs) such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are considered essential omega-3 fatty acids in human nutrition. In marine microalgae EPA and/or DHA are allegedly involved in the regulation of membrane fluidity and thylakoid membrane functioning. The cellular content of EPA and DHA may therefore be enhanced at low temperature and irradiance conditions. As a result, polar and cold temperate marine microalgal species might potentially be suitable candidates for commercial EPA and DHA production, given their adaptation to low temperature and irradiance habitats.In the present study we investigated inter- and intraspecific EPA and DHA variability in five polar and (cold) temperate microalgae. Intraspecific EPA and DHA content did not vary significantly in an Antarctic (Chaetoceros brevis) and a temperate (Thalassiosira weissflogii) centric diatom after acclimation to a range of irradiance levels at two temperatures. Interspecific variability was investigated for two Antarctic (Chaetoceros brevis and Pyramimonas sp. (Prasinophyceae)) and three cold-temperate species (Thalassiosira weissflogii, Emiliania huxleyi (Prymnesiophyceae) and Fibrocapsa japonica (Raphidophyceae)) during exponential growth. Interspecific variability was shown to be much more important than intraspecific variability. Highest relative and absolute levels of DHA were measured in the prymnesiophyte E. huxleyi and the prasinophyte Pyramimonas sp., while levels of EPA were high in the raphidophyte F. japonica and the diatoms C. brevis and T. weissflogii. Yet, no significant differences in LC-PUFA content were found between polar and cold-temperate species. Also, EPA and DHA production rates varied strongly between species. Highest EPA production rate (174 μg L-1 day-1) was found in the Antarctic diatom Chaetoceros brevis, while DHA production was highest in the cold-temperate prymnesiophyte Emiliania huxleyi (164 μg L-1 day-1). We show that, following careful species selection, effective mass cultivation of marine microalgae for EPA and DHA production may be possible under low temperature and irradiance conditions.

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“…The microalga Nannochloropsis oculata is important in aquaculture due to its nutritional value. It belongs to the class Eustigmatophyceae, which species that contain a high amount of fatty acids and pigmentation (Brown et al, 1999;Otero et al, 1997). The nutritional value of microalgae is related to their biochemical composition, especially the lipid and fatty acid compositions.…”

Section: Introductionmentioning

confidence: 99%

Effects of myo-inositol concentration on growth and pigments of Nannochloropsis oculata culture

Durmaz¹,

Erbil²

2020

EgeJFAS

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Inositols are used as growth promoting agents over plants. But microalgae are different from higher plant especially photosynthetic efficiency and productivity. According to the results of this study, myo-inositol addition to the culture medium of Nannochloropsis oculata provides higher cell densities. 100 mg L-1 myo-inositol added experimental group was reached to 1.42 fold cell mL-1, while the 500 mg L-1 myo-inositol added group was reached to 1.28 fold cell mL-1 than the control group. Mean chlorophyll a per cell amounts were calculated for experimental groups and control groups as 0.052 pg cell-1 and 0.053 pg cell-1, respectively. Mean total carotene per cell amounts were calculated for all groups as 0.016 pg cell-1. These results show that no difference was occurred between all groups by chlorophyll a and total carotene amounts per cell. This study shows that myo-inositol use in microalgae production may provide higher yields.

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Cited by 32 publications

References 16 publications

Microalgal biofactories: a promising approach towards sustainable omega-3 fatty acid production

Microalgal biofactories: a promising approach towards sustainable omega-3 fatty acid production

On the potential application of polar and temperate marine microalgae for EPA and DHA production

Effects of myo-inositol concentration on growth and pigments of Nannochloropsis oculata culture

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