Effect of different salinity on the growth performance and proximate composition of isolated indigenous microalgae species

Haris, Noorazilah; Manan, Hidayah; Jusoh, Malinna; Khatoon, Helena; Katayama, Tomoyo; Kasan, Nor Azman

doi:10.1016/j.aqrep.2021.100925

Cited by 28 publications

(15 citation statements)

References 66 publications

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“…A similar finding was obtained for the control strain N. oculata with 50% of the ALA content in the same media. Differences in the fatty acid composition among different media for a particular strain indicated that the salt type and concentrations in media impacts the fatty acid content, consistent with optimizing media, for salt can be useful for targeting levels of specific fatty acids (Minhas et al, 2016a;Haris et al, 2022).…”

Section: Effect Of Different Media On Growth and Fatty Acid Profilingmentioning

confidence: 70%

Bioprospecting Indigenous Marine Microalgae for Polyunsaturated Fatty Acids Under Different Media Conditions

Jain

Minhas

Shukla

et al. 2022

Front. Bioeng. Biotechnol.

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Marine microalgae produce a number of valuable compounds that have significant roles in the pharmaceutical, biomedical, nutraceutical, and food industries. Although there are numerous microalgal germplasms available in the marine ecosystem, only a small number of strains have been recognized for their commercial potential. In this study, several indigenous microalgal strains were isolated from the coast of the Arabian Sea for exploring the presence and production of high-value compounds such as polyunsaturated fatty acids (PUFAs). PUFAs are essential fatty acids with multiple health benefits. Based on their high PUFA content, two isolated strains were identified by ITS sequencing and selected for further studies to enhance PUFAs. From molecular analysis, it was found both the strains were green microalgae: one of them was a Chlorella sp., while the other was a Planophila sp. The two isolated strains, together with a control strain known for yielding high levels of PUFAs, Nannochloropsis oculata, were grown in three different nutrient media for PUFA augmentation. The relative content of α-linolenic acid (ALA) as a percentage of total fatty acids reached a maximum of 50, 36, and 50%, respectively, in Chlorella sp., Planophila sp., and N. oculata. To the best of our knowledge, this is the first study in exploring fatty acids in Planophila sp. The obtained results showed a higher PUFA content, particularly α-linolenic acid at low nutrients in media.

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Section: Effect Of Different Media On Growth and Fatty Acid Profilingmentioning

confidence: 70%

Bioprospecting Indigenous Marine Microalgae for Polyunsaturated Fatty Acids Under Different Media Conditions

Jain

Minhas

Shukla

et al. 2022

Front. Bioeng. Biotechnol.

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“…Compared with the control, the protein content in the culture exposed to the high NaCl concentration (400 mM) increased by 8.44% (Table 1). At this concentration, protein content was also shown to increase in Tetradesmus chuii, Isochrysis galbana, and Chlymydomonas reinhardtii (Haris et al, 2022). As in other microalgae, the accumulation of protein in G. emersonii KNU204 could be due to a protective mechanism against osmotic stress (Anand et al, 2019).…”

Section: Biochemical Composition Of Biomassmentioning

confidence: 75%

“…Salt stress-induced variations in carbohydrate, protein, and lipid contents in microalgae are species-dependent (Fal et al, 2022;Haris et al, 2022). Furthermore, the appropriate concentration of salt required to alter the amount of bioactive compounds and biochemical products varies from species to species.…”

Section: Biochemical Composition Of Biomassmentioning

confidence: 99%

Effect of salt stress on the biomass productivity and potential bioenergy feedstock of Graesiella emersonii KNUA204 isolated from Ulleungdo Island, South Korea

Yeo

Suh

et al. 2023

Front. Energy Res.

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Microalgae are versatile, profitable, and promising sources of bioenergy and high-value products, having various applications in the biotechnology industry. Herein, G. emersonii KNUA204 was isolated from Ulleungdo Island, South Korea, and exposed to stressors, i.e., MgCl2 (75 and 150 mM) and NaCl (200 and 400 mM), to investigate improvement in its biomass productivity and feasibility of the application of biomass. Treatment with mild MgCl2 (75 mM) afforded the highest specific growth rate (μ = 0.13 d−1), dry cell weight (3 g L−1), and total carbohydrate content (29.87%). Although all salt treatments decreased chlorophyll and carotenoid contents, treatment with high NaCl concentration (400 mM) afforded the highest zeaxanthin content (0.3 mg g−1). The proximate and ultimate analyses of biomass following treatment with 150 mM MgCl2 revealed 93.85% volatile matter and 22.55 MJ kg−1 calorific value, respectively, indicating that Graesiella emersonii KNUA204 can be potentially used as bioenergy feedstock. The biodiesel quality was established based on the fatty acid methyl ester profiles, and MgCl2 treatment increased the cetane number more than the control. Therefore, the treatment of G. emersonii KNUA204 with MgCl2 during cultivation could provide a microalgae-based bioenergy feedstock with high productivity.

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“…In salt marshes, the role of Cyanobacteria becomes even more pronounced (table 1). A wide variety of Chlorophyta and Cyanobacteria was also noted for other xerophytic ecosystems [53][54][55], as well as saline soils and salt marshes [6,11,56,57]. Thus, within each ecosystem, a specific ecological space is formed, which is assimilated by various taxa of microalgae.…”

Section: Resultsmentioning

confidence: 91%

Ecological determinants of algal communities of different types of ecosystems

Maltseva

Shcherbyna

Yakoviichuk

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The results of studies of the environmental regularities of the formation of algal communities in soils of various ecosystems in the south of Ukraine are presented. 26 forest, 11 steppe and 3 saline ecosystems were investigated. The research has established the species richness of algae in each ecosystem and produced a multidimensional ordination of algal communities based on the analysis of the main components to clarify the factors that determine the composition of algal communities. The research has established the species richness of algae in each ecosystem and produced a multidimensional ordination of algal communities based on the analysis of the main components to clarify the factors that determine the composition of algal communities. Predictors determined by edaphic conditions and phytocenotic interactions associated primarily with edificators of ecosystems were used for the analysis. The ecological space of the studied ecosystems was formed by four main factors with eigenvalues greater than one, which explained 81.4% of the total variance. PC1 (34.82% of variance) is associated with the type of ecosystem and such edaphic parameters as pH, the availability of moisture in the habitat, and soil mineralization. PC2 (21.98%) reflects changes in the gradients of trophicity (humus content) and granulometric composition of soils. PC3 and PC4 additionally explain 16.04% and 9.27% of the total data variance, respectively. Their values mainly depend on the mineralization, trophicity, and moisture supply of edaphotopes, which, at the level of the composition of algae, is obviously associated with the heterogeneity of the ecological preferences of the algal species themselves, as well as the variability of ecological niches of ecosystems, due to which there are species more typical for other types of ecosystems in the communities. The use of the factor rotation procedure by the Varimax normalized method made it possible to concretize the taxa most associated with the main components: PC1 indicates the various Cyanobacteria species, PC2 – Chlorophyta, Streptophyta and Eustigmatophyceae, PC3 – Xanthophyceae and Euglenozoa, PC4 – Bacillariophyceae.

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Effect of different salinity on the growth performance and proximate composition of isolated indigenous microalgae species

Cited by 28 publications

References 66 publications

Bioprospecting Indigenous Marine Microalgae for Polyunsaturated Fatty Acids Under Different Media Conditions

Bioprospecting Indigenous Marine Microalgae for Polyunsaturated Fatty Acids Under Different Media Conditions

Effect of salt stress on the biomass productivity and potential bioenergy feedstock of Graesiella emersonii KNUA204 isolated from Ulleungdo Island, South Korea

Ecological determinants of algal communities of different types of ecosystems

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