The effects of salinity on the growth and biochemical properties of<i>Chlamydomonas mexicana</i>GU732420 cultivated in municipal wastewater

Salama, El-Sayed; Abou-Shanab, Reda A.I.; Kim, Eun Jung; Lee, Sang-Ho; Kim, Seong Heon; Oh, Sang‐Eun; Kim, Hyun-Chul; Roh, Hyun Seog; Jeon, Byong‐Hun

doi:10.1080/09593330.2013.871350

Cited by 34 publications

(9 citation statements)

References 50 publications

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“…The range of optimum salinity observed in the present study (25−30) was consistent with the previous reports on the same algal species [Barros et al 2014; Rahmadi et al 2020]. Microalgae expend energy to maintain the turgor pressure in their cells at salinity below and above the optimum, which results in a reduction in photosynthesis, biomass productivity, or cell division [Salama et al 2014]. However, it should be noted that though the growth declined, the algae could maintain 36%, 25%, and 22% of the maximum biomass production at salinity 20, 15, and 10, respectively (Fig.…”

Section: Resultssupporting

confidence: 92%

Nutrient Absorption and Biomass Production by the Marine Diatom Chaetoceros muelleri: Effects of Temperature, Salinity, Photoperiod, and Light Intensity

Minggat¹,

Roseli²,

Tanaka³

2021

J. Ecol. Eng.

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The marine diatom Chaetoceros muelleri is commonly used for aquacultural feed and is well known for its fast growth and easy maintenance. In order to evaluate the potential of C. muelleri to be used for the nutrient removal and biomass production from eutrophic saline wastewaters, the algae were cultured under a wide range of temperature, salinity, photoperiod, and light intensity. The optimum temperature for the biomass production was observed at 30°C, but the algae could maintain at least 66% of the highest production between 20°C and 35°C. The optimum salinity for the biomass production was 25, but the algae could maintain at least 22% of the highest production between 10 and 30. Both light intensity and photoperiod affected the algal biomass production, and the minimum light requirement was considered 100 μmol m −2 •s −1 for 6 hours to maintain the biomass production and nitrogen (N) and phosphorus (P) absorption. Throughout all the experiments, the N and P absorption increased with the biomass production, but the ratio of N and P to the biomass exponentially decreased with the biomass production. These results showed that C. muelleri is tolerant to the wide range of environmental conditions, absorbing nutrients and producing organic matter. C. muelleri has a great potential to be introduced in the water treatment processes, especially where the temperature and salinity fluctuate.

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Section: Resultssupporting

confidence: 92%

Nutrient Absorption and Biomass Production by the Marine Diatom Chaetoceros muelleri: Effects of Temperature, Salinity, Photoperiod, and Light Intensity

Minggat¹,

Roseli²,

Tanaka³

2021

J. Ecol. Eng.

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“…increased fatty acid content with increasing salinity in the marine microalgae Isochrysis sp. and Nannochloropsis oculata (Renaud and Parry 1994) and in the freshwater microalga Chlamydomonas mexicana (Salama et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Salinity tolerance of four freshwater microalgal species and the effects of salinity and nutrient limitation on biochemical profiles

2015

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Microalgae are ideal candidates for bioremediation and biotechnological applications. However, salinity and nutrient resource availability vary seasonally and between cultivation sites, potentially impacting on biomass productivity. The aim of this study was to screen pollutant-tolerant freshwater microalgae (Desmodesmus armatus, Mesotaenium sp., Scenedesmus quadricauda and Tetraedron sp.), isolated from Tarong power station ash-dam water, for their tolerance to cultivation at a range of salinities. To determine if biochemical composition could be manipulated, the effects of 4-day nutrient limitation were also determined. Microalgae were cultured at 2, 8, 11 and 18 ppt salinity, and nutrient uptake was monitored daily. Growth, total lipid, fatty acid (FA), and amino acid contents were quantified in biomass harvested while nutrient-replete and, after 4 days, nutrient-deplete. D. armatus showed the highest salinity tolerance actively growing in up to 18 ppt while Mesotaenium sp. was the least halotolerant with decreasing growth rates from 11 ppt. However, Mesotaenium sp. at 2 and 8 ppt had the highest biomass productivity and nutrient requirements of the four species, making it ideal for nutrient remediation of eutrophic freshwater effluents. Salinity and nutrient status had minimal influence on total lipid and FA contents in D. armatus and Mesotaenium sp., while nutrient depletion induced an increase of total lipid and FAs in S. quadricauda and Tetraedron sp., which was further increased with increasing salinity. As none of the growth conditions affected amino acid profiles of the species, these findings provide a basis for species selection based on site-specific salinity conditions and nutrient resource availability.

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“…The increment of lipid content under NaCl induction cannot be as large as under N‐depleted because glycerol and lipid synthesis compete for precursor (pyruvate). Salama et al (2014) reported glycerol and lipid contents both increase under salt stress. Proline content increased with salt concentration.…”

Section: Resultsmentioning

confidence: 99%

Regulation and remodeling of intermediate metabolite and membrane lipid during NaCl‐induced stress in freshwater microalga Micractinium sp. XJ‐2 for biofuel production

Yang

2020

Biotech & Bioengineering

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Microalgae can accumulate a large fraction of reduced carbon as lipids under NaCl stress. This study investigated the mechanism of carbon allocation and reduction and triacylglycerol (TAG) accumulation in microalgae under NaCl-induced stress. Micractinium sp. XJ-2 was exposed to NaCl stress and cells were subjected to physiological, biochemical, and metabolic analyses to elucidate the stress-responsive mechanism. Lipid increased with NaCl concentration after 0-12 hr, then stabilized after 12-48 hr, and finally decreased after 48-72 hr, whereas TAG increased (0-48 hr) and then decreased (48-72 hr). Under NaCl-induced stress at lower concentrations, TAG accumulation, at first, mainly shown to rely on the carbon fixation through photosynthetic fixation, carbohydrate degradation, and membrane lipids remodeling. Moreover, carbon compounds generated by the degradation of some amino acids were reallocated and enhanced fatty acid synthesis. The remodeling of the membrane lipids of NaCl-induced microalgae relied on the following processes: (a) Increase in the amount of phospholipids and reduction in the amount of glycolipids and (b) extension of long-chain fatty acids. This study enhances our understanding of TAG production under NaCl stress and thus will provide a theoretical basis for the industrial application of NaCl-induced in the microalgal biodiesel industry.

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The effects of salinity on the growth and biochemical properties ofChlamydomonas mexicanaGU732420 cultivated in municipal wastewater

Cited by 34 publications

References 50 publications

Nutrient Absorption and Biomass Production by the Marine Diatom Chaetoceros muelleri: Effects of Temperature, Salinity, Photoperiod, and Light Intensity

Nutrient Absorption and Biomass Production by the Marine Diatom Chaetoceros muelleri: Effects of Temperature, Salinity, Photoperiod, and Light Intensity

Salinity tolerance of four freshwater microalgal species and the effects of salinity and nutrient limitation on biochemical profiles

Regulation and remodeling of intermediate metabolite and membrane lipid during NaCl‐induced stress in freshwater microalga Micractinium sp. XJ‐2 for biofuel production

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