Changes in Carbon Partitioning and Pattern of Antioxidant Enzyme Activity Induced by Arginine Treatment in the Green Microalga Dunaliella salina Under Long-Term Salinity

Bamary, Zahra; Einali, Alireza

doi:10.1007/s00248-021-01843-3

Cited by 10 publications

(11 citation statements)

References 100 publications

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“…Arginine is proteinogenic and acts as an essential metabolite in many cellular and developmental processes which can induce microalgae tolerance to abiotic stress. However, to date, few studies have focused on the role of this amino acid in algae stress tolerance [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

Sartori

Vendruscolo

Ribeiro

et al. 2022

Life

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The objective of this work was to evaluate the effect of different photo-cycles on the growth and biochemical profile of Scenedesmus obliquus CPCC05, focusing on food interest compounds. The photo-cycle conditions were separated into three groups: long-term photo-cycles (24:0, 22:2, 20:4, 18:6, 12:12, and 10:14 (h:h)), frequency photo-cycles (2, 4, 8, 12, 24, and 48 times per day (t/d)), and short photo-cycles (0.91:0.09, 0.83:0.17, 0.75:0.25, and 0.50:0.50 (s:s)) of light:dark, respectively. The results showed these microalgae can store enough energy to support cell growth for continuous periods of up to 2 h in the dark, without affecting the productivity of the process. This 2 h, when divided into 2 cycles per day (2 t/d), showed the best growth condition (3700 mg L−1), generation time (14.40 h), and maximum biomass productivity (21.43 mg L h−1). This photo-cycle of 2 t/d was also the best condition for the production of total sterols. However, the values of polyunsaturated fatty acids, lipid content, and amino acids obtained higher yields in the short photo-cycle of 0.75:0.25. Thus, the modulation of light cycles becomes an important tool for boosting and directing the production of target molecules in phototrophic cultures of microalgae.

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Section: Resultsmentioning

confidence: 99%

The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

Sartori

Vendruscolo

Ribeiro

et al. 2022

Life

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“…Similar results were obtained in Ulva fasciata after a 12 h exposure to NaCl 90 g L −1 since CAT, Fe-SOD, Mn-SOD, and APX activities were stimulated [ 86 ]. Bamary and Einali [ 87 ] indicate the induction of oxidative stress in D. salina cells reared under 3 M NaCl (175 g L −1 ) by the induction of H 2 O 2 level.…”

Section: Discussionmentioning

confidence: 99%

Physiological and Biochemical Responses in Microalgae Dunaliella salina, Cylindrotheca closterium and Phormidium versicolor NCC466 Exposed to High Salinity and Irradiation

Guermazi

Masmoudi

Annabi-Trabelsi

et al. 2023

Life

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Dunaliella salina (Chlorophyceae), Phormidium versicolor (Cyanophyceae), and Cylindrotheca closterium (Bacillariophyceae) were isolated from three ponds in the solar saltern of Sfax (Tunisia). Growth, pigment contents, and photosynthetic and antioxidant enzyme activities were measured under controlled conditions of three light levels (300, 500, and 1000 µmol photons m−2 s−1) and three NaCl concentrations (40, 80, and 140 g L−1). The highest salinity reduced the growth of D. salina and P. versicolor NCC466 and strongly inhibited that of C. closterium. According to ΦPSII values, the photosynthetic apparatus of P. versicolor was stimulated by increasing salinity, whereas that of D. salina and C. closterium was decreased by irradiance rise. The production of carotenoids in D. salina and P. versicolor was stimulated when salinity and irradiance increased, whereas it decreased in the diatom. Catalase (CAT), Superoxide dismutase (SOD), and Ascorbate peroxidase (APX) activities were only detected when the three species were cultivated under E1000. The antioxidant activity of carotenoids could compensate for the low antioxidant enzyme activity measured in D. salina. Salinity and irradiation levels interact with the physiology of three species that have mechanisms of more or less effective stress resistance, hence different resistance to environmental stresses according to the species. Under these stress-controlled conditions, P. versicolor and C. closterium strains could provide promising sources of extremolyte for several purposes.

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“…The polysaccharide complex has strong biological activity, which can enhance the antigen, immune function, and the phagocytic function of the macrophage. 81,82 2. Polysaccharide sulfate, which removes free radicals under high radiation, uses osmotic pressure to transport free radicals out of cells and is therefore resistant to oxidation.…”

Section: Applications In Medicinementioning

confidence: 99%

Applications of microalga-powered microrobots in targeted drug delivery

Zhou,

Yin,

Zhao

et al. 2023

Biomater. Sci.

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Changes in Carbon Partitioning and Pattern of Antioxidant Enzyme Activity Induced by Arginine Treatment in the Green Microalga Dunaliella salina Under Long-Term Salinity

Cited by 10 publications

References 100 publications

The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

Physiological and Biochemical Responses in Microalgae Dunaliella salina, Cylindrotheca closterium and Phormidium versicolor NCC466 Exposed to High Salinity and Irradiation

Applications of microalga-powered microrobots in targeted drug delivery

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