Dunaliella salina Hsp90 is halotolerant

Chen, Xiangjun; Wu, Mengyin; Jiang, Yan; Yang, Yi; Yan, Yong‐Bin

doi:10.1016/j.ijbiomac.2015.01.057

Cited by 11 publications

(6 citation statements)

References 38 publications

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“…In the present work, Dunaliella salina and Nannochloropsis gaditana were chosen as model study based on their good reported results in relation to biomass and lipid productivities [10][11][12][13]. In addition, the microalgae Dunaliella salina is of interest due to its highly tolerance to salinity variations in the cultivation media [14,15]. Thus, the aim of this study was to evaluate these microalgae as feedstocks for biodiesel production; the focus was on cultivation optimization, lipid production and predicting the biofuel quality based on the fatty acids profile.…”

Section: Introductionmentioning

confidence: 99%

Nannochloropsis gaditana and Dunaliella salina as Feedstock for Biodiesel Production: Lipid Production and Biofuel Quality

Bredda

Rós

Pedro

et al. 2019

JABB

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Introduction: Microalgal lipids have a wide range of applications, from biodiesel manufacture in the energy industry to the production of polyunsaturated fatty acids for the pharmaceutical industry. Microalgal lipid productivity and quality, however, vary greatly depending on cultivation parameters. Aims: In this study, we investigated the potential of two marine microalgae, Nannochloropsis gaditana and Dunaliella salina, to be used as feedstock for biodiesel production. Methodology: A Taguchi L4 orthogonal array design was applied to understand the effects of sodium acetate (0 or 2 g L−1), sodium bicarbonate (0 or 2 g L−1), and sodium nitrate (25 or 75 mg L−1) concentrations on biomass and lipid productivities. Fatty acid methyl ester (FAME) profiles of microalgal lipids obtained under the best conditions were determined, and FAME results were used to predict biodiesel properties. Results: Both carbon sources (sodium acetate and sodium bicarbonate) improved biomass productivity. Lipid productivity was enhanced only by sodium acetate. The highest lipid productivities obtained were 10.25 ± 1.02 and 12.12 ± 0.28 mg L−1 day−1 for N. gaditana and D. salina, respectively. Palmitic (C16:0), stearic (C18:1), oleic (C18:1), linoleic (C18:2), lauric (C12:0), and myristic (C14:0) acids were the major components of D. salina oil. The major fatty acids in N. gaditana oil were C16:0, C18:0, and C18:1. Conclusion: The great differences in FAME profiles resulted in different biodiesel properties. Biodiesel from N. gaditana oil was predicted to have a higher cetane number (73.20) than that derived from D. salina oil (59.59). D. salina oil biodiesel, however, was predicted to have better properties than N. gaditana oil biodiesel, including lower cloud point (0.46°C) and cold filter plugging point (−7.27°C).

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Section: Introductionmentioning

confidence: 99%

Nannochloropsis gaditana and Dunaliella salina as Feedstock for Biodiesel Production: Lipid Production and Biofuel Quality

Bredda

Rós

Pedro

et al. 2019

JABB

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“…Dunaliella is a wall‐less, unicellular halotolerant microalga (Chen et al. ) having the unique ability to survive in harsh environments such as high salinity, high irradiance, low temperature, and under macro and micronutrient limitations. However, halophilic and halotolerant strains are interchangeable as concluded by Ginzburg et al.…”

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confidence: 99%

Biochemical and physiological characterization of a halotolerant Dunaliella salina isolated from hypersaline Sambhar Lake, India

Singh

Khadim

Singh

et al. 2018

Journal of Phycology

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The objective of the present study was to characterize intrinsic physiological and biochemical properties of the wall-less unicellular cholorophyte Dunaliella salina isolated from a hypersaline Sambhar Lake. The strain grew optimally at 0.5 M NaCl and 16:8 h L:D photoperiod along with maintaining low level of intracellular Na even at higher salinity, emphasizing special features of its cell membranes. It was observed that the cells experienced stress beyond 2 M NaCl as evidenced by increased intracellular reactive oxygen species and antioxidative enzymes, nevertheless proline and malondialdehyde content declined sharply accompanied by higher neutral lipid accumulation. Salinity exceeding 2 M resulted decrease in photosynthetic quantum yield (Fv/Fm) and enhanced glycerol synthesis accompanied by leakage. Super oxide dismutase seemed to play a pivotal role in antioxidative defense as eight isoforms were expressed differentially while catalase and glutathione peroxidase showing no significant change in their expression at higher salinity. The ability of D. salina to grow in range of salinities by sustaining healthy photosynthetic apparatus along with accumulation of valuable products made this alga an ideal organism that can be exploited as resource for biofuel and commercial products.

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“…Dunaliella salina is a unicellular green alga of outstanding halotolerance [56]. Salt stress induces the secretion of extracellular polymeric substances from D. salina .…”

Section: Exopolysaccharides (Eps)mentioning

confidence: 99%

Extracellular Metabolites from Industrial Microalgae and Their Biotechnological Potential

2016

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Industrial microalgae, as a big family of promising producers of renewable biomass feedstock, have been commercially exploited for functional food, living feed and feed additives, high-value chemicals in nutraceuticals, cosmeceuticals, and chemical reagents. Recently, microalgae have also been considered as a group that might play an important role in biofuel development and environmental protection. Almost all current products of industrial microalgae are derived from their biomass; however, large amounts of spent cell-free media are available from mass cultivation that is mostly unexploited. In this contribution we discuss that these media, which may contain a remarkable diversity of bioactive substances are worthy to be recovered for further use. Obviously, the extracellular metabolites from industrial microalgae have long been neglected in the development of production methods for valuable metabolites. With the advances in the last ten years, more and more structures and properties from extracellular metabolites have been identified, and the potential utilization over wide fields is attracting attention. Some of these extracellular metabolites can be potentially used as drugs, antioxidants, growth regulators or metal chelators. The purpose of this review is to provide an overview of the known extracellular metabolites from industrial microalgae which might be of commercial interest. The attention mainly focuses on the reports of extracellular bioactive metabolites and their potential application in biotechnology.

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Dunaliella salina Hsp90 is halotolerant

Cited by 11 publications

References 38 publications

Nannochloropsis gaditana and Dunaliella salina as Feedstock for Biodiesel Production: Lipid Production and Biofuel Quality

Nannochloropsis gaditana and Dunaliella salina as Feedstock for Biodiesel Production: Lipid Production and Biofuel Quality

Biochemical and physiological characterization of a halotolerant Dunaliella salina isolated from hypersaline Sambhar Lake, India

Extracellular Metabolites from Industrial Microalgae and Their Biotechnological Potential

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