Antioxidant activity and phycoremediation ability of four cyanobacterial isolates obtained from a stressed aquatic system

Badr, Omnia A. M.; El-Shawaf, I. I. S.; El-Garhy, Hoda A.S.; Moustafa, Mahmoud M. A.; Ahmed-Farid, Omar A.

doi:10.1016/j.ympev.2019.01.018

Cited by 15 publications

(5 citation statements)

References 51 publications

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“…In this study, the antioxidant activity of crude extracts from C. alatosporum and L. cavenicola (as detailed in Table 5) suggests their limited efficacy as scavengers of DPPH radicals, yet they exhibit superior scavenging abilities against ABTS radicals. Notably, the ethanol extract of L. cavenicola demonstrates commendable scavenging activity in the DPPH system, echoing similar trends reported by [36,37] regarding the weak activity of Nostoc extracts in the DPPH system. Conversely, the ABTS+ system presents a contrasting scenario, with the ethanol extract of L. cavenicola showing subpar performance.…”

Section: Discussionsupporting

confidence: 83%

In Vitro Antioxidant and In Silico Evaluation of the Anti-β-Lactamase Potential of the Extracts of Cylindrospermum alatosporum NR125682 and Loriellopsis cavenicola NR117881

Ikhane,

Sithole,

Cele

et al. 2024

Antioxidants

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Cyanobacteria in recent times have been touted to be a suitable source for the discovery of novel compounds, including antioxidants and antibiotics, due to their large arsenal of metabolites. This study presents the in vitro antioxidant and in silico evaluation of Cylindrospermum alatosporum NR125682 and Loriellopsis cavenicola NR117881, isolated from freshwater ponds around the campus of the University of Zululand, South Africa. The isolates were confirmed using 16S rRNA. Various crude extracts of the isolated microbes were prepared through sequential extraction using hexane, dichloromethane, and 70% ethanol. The chemical constituents of the crude extracts were elucidated by FTIR and GC-MS spectroscopy. The antioxidant potential of the extracts was determined by the free radical (DPPH, ABTS, •OH, and Fe2+) systems. Molecular docking of the major constituents of the extracts against β-lactamase was also evaluated. GC-MS analysis indicated the dominating presence of n-alkanes. The extracts exhibited varying degrees of antioxidant activity (scavenging of free radicals; an IC50 range of 8–10 µg/mL was obtained for ABTS). A good binding affinity (−6.6, −6.3 Kcal/mol) of some the organic chemicals (diglycerol tetranitrate, and 2,2-dimethyl-5-(3-methyl-2-oxiranyl)cyclohexanone) was obtained following molecular docking. The evaluated antioxidant activities, coupled with the obtained docking score, potentiates the antimicrobial activity of the extracts.

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Section: Discussionsupporting

confidence: 83%

In Vitro Antioxidant and In Silico Evaluation of the Anti-β-Lactamase Potential of the Extracts of Cylindrospermum alatosporum NR125682 and Loriellopsis cavenicola NR117881

Ikhane,

Sithole,

Cele

et al. 2024

Antioxidants

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“…Only 16 SSR markers were found to be polymorphic and they were used for the SSR analysis. The polymerase chain reaction (PCR) reaction was done according to Badr et al (2019). The reaction was performed in the (AriaMx) PCR Thermo cycler consisting of 95 ˚C for 3 min followed by 35 cycles at 95 ˚C for 50 s, annealing temperature was calculated for each primer, then for 1 min with an extension of 72 ˚C for 1 min followed by final extension temperature at 72 ˚C for 5 min.…”

Section: Polymerase Chain Reaction Amplification and Simple Sequence ...mentioning

confidence: 99%

Molecular markers and GGE biplot analysis for selecting higher‐yield and drought‐tolerant maize hybrids

et al. 2021

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Improving maize (Zea mays L.) genotypes for higher productivity and tolerance to drought stress depends mainly on physiological and molecular markers. Therefore, this study aims at breeding maize for drought tolerance and high potentiality by selection based on molecular markers, photosynthetic parameters; and easy graphic methods that help in selecting elite genotypes across diverse environments. An 8 × 8 half diallel analysis was used at two locations involving drought and normal irrigation treatments to study parental genetic diversity (GD) and combining ability (general combing ability [GCA] and specific combining ability [SCA]) in F1 of maize. Fingerprinting of parents was made using simple sequence repeat (SSR) markers. Fiftyeight alleles were ranged from two to five alleles per locus with an average of 0.63 alleles per locus. The average of polymorphic information content (PIC) was 0.63. Cuvette temperature (oc) was lowest by the cross L14 × L36. The cross L8 × L34 expresses the highest value for Quantum sensor (μmol m -2 s -1 ), net CO 2 assimilation rate and chlorophyll content. As for leaf diffusive resistance (LDR) four crosses exhibited significant desirable LDR values. Concerning rate of leaf transpiration (LTR) (μg cm −2 S −1 ) the cross (L5 × L104) gave the lowest value. Most hybrids exhibited desirable values for drought susceptibility index. For grain yield plant -1 , five F 1 crosses, that is, L5 × L34, L8 × L14, L8 × L14, L30 × L104, and L36 × L104 expressed the most desirable SCA effects. These crosses are promising in maize breeding programs. Based on GGE biplot analysis, genotype nos. 8 and 10 exhibited the highest grain yield plant −1 and ranked the first across all environments.

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“…Numerous studies have been conducted on the characteristics of the microalgae obtained by a phycoremediation process (Yaakob et al 2014;Nasir et al 2015;Badr et al 2019;Apandi et al 2019;Michelon et al 2021). Phycoremediation is a biotechnological process to remove contaminants from wastewater and is considered a simpler method than the conventional one (Raskin et al 1997;Atiku et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Potential application and beneficial effects of a marine microalgal biomass produced in a high-rate algal pond (HRAP) in diets of European sea bass, Dicentrarchus labrax

Pascon

Messina

Petit

et al. 2021

Environ Sci Pollut Res

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Microalgae have been used as live food in aquatic species. In recent years, the interest in microalgae has considerably increased, thanks to the evolution of production techniques that have identified them as an ecologically attractive aquafeed ingredient. The present study provides the first data about the effects of dietary inclusion of a microalgae consortium grown in a high-rate algal pond system on zootechnical performance, morphometric indices, and dietary nutrient digestibility as well as morphology and functionality of the digestive system of European sea bass, Dicentrarchus labrax. A dietary treatment including a commercial mono-cultured microalgae (Nannochloropsis sp.) biomass was used for comparison. Six hundred and thirty-six European sea bass juveniles (18 ± 0.28 g) were randomly allotted into 12 experimental groups and fed 4 different diets for 10 weeks: a control diet based on fish meal, fish oil, and plant protein sources; a diet including 10% of Nannochloropsis spp. biomass (100 g/kg diet); and two diets including two levels (10% and 20%) of the microalgal consortium (100 and 200 g/kg diet). Even at the highest dietary inclusion level, the microalgal consortium (200 g/kg diet) did not affect feed palatability and fish growth performance. A significant decrease in the apparent digestibility of dry matter, protein, and energy was observed in diets including 10 and 20% of the microalgal consortium, but all fish exhibited a well-preserved intestinal histomorphology. Moreover, dietary inclusion with the microalgal consortium significantly increased the enzymatic activity of maltase, sucrase-isomaltase, and ɤ-glutamil transpeptidase in the distal intestine of the treated European sea bass. Algal consortium grown using fish farm effluents represents an attempt to enhance the utilization of natural biomasses in aquafeeds when used at 10 % as substitute of vegetable ingredients in diet for European sea bass.

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Antioxidant activity and phycoremediation ability of four cyanobacterial isolates obtained from a stressed aquatic system

Cited by 15 publications

References 51 publications

In Vitro Antioxidant and In Silico Evaluation of the Anti-β-Lactamase Potential of the Extracts of Cylindrospermum alatosporum NR125682 and Loriellopsis cavenicola NR117881

In Vitro Antioxidant and In Silico Evaluation of the Anti-β-Lactamase Potential of the Extracts of Cylindrospermum alatosporum NR125682 and Loriellopsis cavenicola NR117881

Molecular markers and GGE biplot analysis for selecting higher‐yield and drought‐tolerant maize hybrids

Potential application and beneficial effects of a marine microalgal biomass produced in a high-rate algal pond (HRAP) in diets of European sea bass, Dicentrarchus labrax

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