Combined effect of salinity and pH on lipid content and fatty acid composition of Tisochrysis lutea

Al-Mutairi, Adel; El-Sayed, Abo El-Khair B.; Reda, Marwa M.

doi:10.1016/j.sjbs.2020.07.027

Cited by 25 publications

(15 citation statements)

References 44 publications

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“…87 In Tisochrysis lutea exposed to salt stress above seawater salinity, total lipid increased at intermediate salt stress but decreased under maximum salt stress. 88 A moderate total lipid increase with salinity was reported in different Tetraselmis strains, 31,80,89 while no changes were observed in Tetraselmis suecica in a salinity range of 10-60 psu. 10 Total lipids were also stable with salinity in actively growing cells of the Eustigmatophyte N. salina.…”

Section: Theinter Ac Tingeffec Tof Salinit Yandculturecond Iti On Son Lipidcontentinmi Croalg Aementioning

confidence: 95%

“…In halophile Dunaliella strains, both 18-C PFA increased with salinity, 38,122,136 as it also happened in A. subtropica 38 and the marine haptophyte Tisochrysis lutea. 88 In the estuarine D.…”

Section: Analys Ingfat T Yacid Un Satur Ati Onandsalinit Yin Microalg Aementioning

confidence: 99%

“…34,171,186 A slight increase in salinity above that of seawater had little effect on 20:5n-3 and 22:6n-3 in species such as P. lutheri 196 and Isochrysis spp. 21,93,166,197 Higher salt stress also had minor effects on 20:5n-3 in the halotolerant species T. suecica 10 and A. subtropica 38 ; however, it induced this PFA to increase in Tisochrysis lutea 88 and to decrease in Nannochloropsis spp. 9,170 The effect of salinity on 20:5n-3…”

Section: Analys Ingfat T Yacid Un Satur Ati Onandsalinit Yin Microalg Aementioning

confidence: 99%

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An appraisal of the variable response of microalgal lipids to culture salinity

Cañavate

Fernández‐Díaz

2021

Reviews in Aquaculture

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Salinity is an important factor in microalgal mass production that has been less studied than other external factors such as temperature and irradiance. The greater attention paid to the effects of these two factors reflects the important influence that both exert on growth and production of microalgae. 1 However, the ability to control the effects of temperature and irradiance on microalgal production is inversely proportional to the size of the culture system. This especially affects outdoor mass production systems, under which conditions the options for regulating the effects of temperature and irradiance are very limited. Therefore, lower-cost outdoor open production systems are highly dependent on how environmental factors change. In this type of system, salinity takes on a key role as an easier factor to handle to optimize production. Production of freshwater microalgae at higher salinity is possible thanks to the availability of several salttolerant species. [2][3][4][5] Microalgal production in environments of variable salinity may be even more feasible if not only estuarine species

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Section: Theinter Ac Tingeffec Tof Salinit Yandculturecond Iti On Son Lipidcontentinmi Croalg Aementioning

confidence: 95%

Section: Analys Ingfat T Yacid Un Satur Ati Onandsalinit Yin Microalg Aementioning

confidence: 99%

Section: Analys Ingfat T Yacid Un Satur Ati Onandsalinit Yin Microalg Aementioning

confidence: 99%

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An appraisal of the variable response of microalgal lipids to culture salinity

Cañavate

Fernández‐Díaz

2021

Reviews in Aquaculture

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“…Nowadays, there is consensus that microalgae lipids are a renewable alternative feedstock for biofuel production that has many advantages over other feedstocks. Microalgae-derived lipids provide a safe substitute for petroleum diesel due to their sustainability, biodegradability, non-toxicity, and low greenhouse gas (GHG) emissions [3]. There are several advantages for using microalgae as a third-generation biofuel over the first-and second-generations which include food crops and non-food wastes, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Microalgal capacity to alter the lipid biosynthesis under unfavorable conditions has contributed to various lipid augmentation strategies such as salt stress and nutrient deprivation [3,10,11]. In that context, nitrogen (N) stress is considered beneficial because of its easy implementation and strong impact on lipid content.…”

Section: Introductionmentioning

confidence: 99%

Effect of Phytohormones Supplementation under Nitrogen Depletion on Biomass and Lipid Production of Nannochloropsis oceanica for Integrated Application in Nutrition and Biodiesel

Touliabah

Al-Mutairi

2021

Sustainability

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Economic viability of biodiesel production relies mainly on the productivity of biomass and microalgal lipids. In addition, production of omega fatty acids is favorable for human nutrition. Thus, enhancement of lipid accumulation with high proportion of omega fatty acids could help the dual use of microalgal lipids in human nutrition and biodiesel production through biorefinery. In that context, phytohormones have been identified as a promising factor to increase biomass and lipids production. However, nitrogen limitation has been discussed as a potential tool for lipid accumulation in microalgae, which results in simultaneous growth retardation. The present study aims to investigate the combined effect of N-depletion and 3-Indoleacetic acid (IAA) supplementation on lipid accumulation of the marine eustigmatophyte Nannochloropsis oceanica as one of the promising microalgae for omega fatty acids production. The study confirmed that N-starvation stimulates the lipid content of N. oceanica. IAA enhanced both growth and lipid accumulation due to enhancement of pigments biosynthesis. Therefore, combination effect of IAA and nitrogen depletion showed gradual increase in the dry weight compared to the control. Lipid analysis showed lower quantity of saturated fatty acids (SFA, 26.25%) than the sum of monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA). Under N-depletion, SFA decreased by 12.98% compared to the control, which recorded much reduction by increasing of IAA concentration. Reduction of SFA was in favor of PUFA, mainly omega-6 and omega-3 fatty acids which increased significantly due to IAA combined with N-depletion. Thus, the present study suggests a biorefinery approach for lipids extracted from N. oceanica for dual application in nutrition followed by biodiesel production.

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Bioresource potential of Tetradesmus obliquusUJEA_AD: critical evaluation of biosequestration rate, biochemical and fatty acid composition in BG11 media

Ahiahonu

Anku

Roopnarain

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Microalgae biomass is regarded as one of the most promising renewable biomass energy resources with the potential as a sustainable biological climate change mitigation agent, raw material for commercially valuable products and fossil fuel replacement. In view of that, this study isolated, identified and evaluated the potential of an indigenous freshwater green microalga strain, Tetradesmus obliquus UJEA_AD, collected from Emmarentia Dam, Johannesburg, South Africa.RESULTS: Morphological analysis and sequencing of the rbcL biomarker aided in identification of the isolate as T. obliquus. Tetradesmus obliquus UJEA_AD was further batch-cultivated autotrophically in BG11 medium and examined for biomass accumulation, CO 2 biofixation rate, biochemical composition and fatty acid production. The results showed a maximum biomass accumulation of 2.78 ± 0.019 g L −1 with biomass productivity of 0.153 ± 0.001 g L −1 day −1 and specific growth rate of 0.13 ± 0.004 day -1 as well as CO 2 biofixation rate of 0.265 ± 0.002 gCO 2 L −1 day −1 . The biochemical data of the isolate revealed 27.17% ± 0.021% carbohydrate, 38.00% ± 0.15% protein and 31.2% ± 0.80% lipids; with primary fatty acids such as palmitic acid (34.26% ± 2.02%), linolenic acid (18.08 ± 5.29), trans-13-octadecenoic acid (12.32 ± 0.92) and phytol, 2-methylbutanoate (12.31 ± 1.02).CONCLUSION: These findings suggest that T. obliquus UJEA_AD is capable of producing bioproducts of economic value with an excellent CO 2 bio-mitigation potential when cultivated at optimum conditions in an autotrophic mode. Moreover, lipid extracted from T. obliquus UJEA_AD met the biodiesel quality standards of the USA and EU, making the isolate a promising commercial biodiesel feedstock.

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Combined effect of salinity and pH on lipid content and fatty acid composition of Tisochrysis lutea

Abstract: Graphical abstract

Cited by 25 publications

References 44 publications

An appraisal of the variable response of microalgal lipids to culture salinity

An appraisal of the variable response of microalgal lipids to culture salinity

Effect of Phytohormones Supplementation under Nitrogen Depletion on Biomass and Lipid Production of Nannochloropsis oceanica for Integrated Application in Nutrition and Biodiesel

Bioresource potential of Tetradesmus obliquusUJEA_AD: critical evaluation of biosequestration rate, biochemical and fatty acid composition in BG11 media

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