Effect of Carbon Content, Salinity and pH on Spirulina platensis for Phycocyanin, Allophycocyanin and Phycoerythrin Accumulation

Sharma, Gaurav; Kumar, Manoj; Ali, Mohammad; Jasuja, Nakuleshwar Dut

doi:10.4172/1948-5948.1000144

Cited by 38 publications

(24 citation statements)

References 42 publications

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“…La salinidad es un parámetro de cultivo que afecta la fisiología de Spirulina (Sreevani, Bhanumathi, Mohammad, & Murthy, 2011;Sharma, Kumar, Irfan, & Dut, 2014), ejerciendo su efecto en el crecimiento, la síntesis de clorofila a, la ficocianina y los carotenoides (Lamela & Márquez, 2000;Murugan & Rajesh, 2014;Sharma et al, 2014); sin embargo, muchos aspectos fisiológicos, relacionados con la aclimatación, la tolerancia al estrés, la producción de macromoléculas y el crecimiento en medios salinos permanecen sin esclarecer.…”

Section: Discussionunclassified

Crecimiento y pigmentos de Spirulina subsalsa cultivada a diferentes salinidades y concentraciones de nitrógeno

Maza

Guevara

Bernal³

2018

Revista Mutis

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El objetivo de la presente investigación fue evaluar el crecimiento y el contenido de pigmentos de un nuevo aislado de Spirulina subsalsa cultivada en agua mar a diferentes salinidades y concentraciones de nitrógeno. La nueva cepa de S. subsalsa se aisló a partir de muestras de agua procedentes del embalse de Clavellino, estado Sucre, Venezuela, y fue identificada haciendo uso de la clave taxonómica propuesta por Aguiar (2013). El medio de cultivo ensayado fue el f/2, modificando las concentraciones de nitrato (14,5; 29 y 58 mmol/L) y cloruro de sodio (0, 9 y 18 ‰ por adición de agua de mar). Los cultivos se realizaron por triplicado, de forma discontinua, bajo condiciones de medio ambiente controlado (T: 30±1 ºC; iluminación: 3.000 lux; agitación manual, fotoperiodo 12:12), durante 21 días. Los resultados obtenidos evidenciaron que la salinidad de 9 ‰ y la concentración de Crecimiento y pigmentos de Spirulina subsalsa cultivada a diferentes salinidades y concentraciones de nitrógeno 26• Revista electrónica editada por la Facultad de Ciencias Naturales e Ingeniería de la UJTL nitrato de 14 mmol/L fueron los parámetros que propiciaron los mayores contenidos de biomasa; mientras que la clorofila a y la ficocianina mostraron mayores valores en la misma concentración de nitrógeno, 0 ‰. Estos hallazgos indican que la salinidad y la concentración de nitrógeno afectan el crecimiento y los pigmentos del nuevo aislado de S. subsalsa y además sugieren que esta cepa posee potencial para su aprovechamiento biotecnológico con miras a obtener metabolitos valiosos en las industrias alimenticias y farmacológicas.

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Section: Discussionunclassified

Crecimiento y pigmentos de Spirulina subsalsa cultivada a diferentes salinidades y concentraciones de nitrógeno

Maza

Guevara

Bernal³

2018

Revista Mutis

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“…The average size of synthesized silver nanoparticles synthesized by Abelia grandiflora was 100nm and the shape of the silver nanoparticles proved to be spherical in nature [21]. The SEM image showed that the synthesized silver nanoparticles from (Jasminum sambac L.) were cluster and their size ranged from 14-17nm.…”

Section: Scanning Electron Microscopy(sem)mentioning

confidence: 94%

Green Synthesis and Characterization of Silver Nanoparticles

2017

IJMTER

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Abstract-Silver nanoparticles (Ag NPs) were synthesized as green mode by using onion extracts. The onion extract was used as reducing agent as well as stabilizer. The green synthesized nanoparticles were initially confirmed by visual observation by colour change of the reaction mixture. The metal ions were reduced during the exposure to aqueous extract of onion. It was observed that the colour of the reaction mixture was changed into pale yellow to dark brown. The synthesized nanoparticles were further characterized by UV-Vis. spectroscopy, FTIR Spectroscopy, X-Ray diffraction,SEM,EDAX and Zeta potential analyses. The maximum absorption peak for silver nanoparticles was at 425nm. The phytochemical found in the onion extract were responsible for the formation of nanoparticles from silver nitrate. The FT-IR spectrum Ag nanoparticles the peaks from 2991.39 to 652.86cm -1 . XRD analysis clearly indicated that the average crystalline size of silver nanoparticles. The SEM analysis revealed that the green synthesized Ag NPs were spherical in shape. By using Zeta potential analysis, Ag NPs were confirmed by typical absorption peak at 3KeV. Further, based on the Zeta potential analysis, the stability of the onion mediated synthesized nanoparticles have good stability. The synthesized Ag NPs have an efficient antimicrobial activity. The antimicrobial activity was varied with species to species.

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“…The experimental organism S. platensis was isolated from Kodai road, Dindugal, Tamilnadu (India) and cultivated in Zarrouk's medium under 30±2°C temperature and illuminated with white fluorescent lamps at a light intensity of 2,000 lux (Sharma et al 2014) [5].…”

Section: Methodsmentioning

confidence: 99%

“…In an Erlenmeyer flask, 5 g (dry weight) S. platensis biomass was suspended in 100 ml double distilled sterile water and heated for 15 minutes at 100°C [5]. The mixture was boiled, then cooled and centrifuged for 15 minutes at 10,000 rpm.…”

Section: Preparation Of Microalgal Extractmentioning

confidence: 99%

Antibacterial Effect of Biosynthesized Zinc Oxide Nanoparticles against Erwinia amylovora and Induction of Crop Growth

Jagathy¹,

Lavanya²

2021

JPRI

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Objectives: Zinc oxide nanoparticles (ZnO-NPs) are widely recognized as one of the most promising types of materials in a wide range of applications, including agriculture. Modern systemic efforts have identified several therapeutically active microalgae-derived compounds, including phenols, flavonoids and others. The antibacterial properties of the phenolic substances were demonstrated. Hence, the present study aims to exhibit the antibacterial activity of the bioactive compound capped silver nanoparticles under in vitro conditions. Methods: Bioactive compound separated by Solid-phase Extraction method. Dispersible Zinc oxide nanoparticles synthesized using the bioactive compound as the major capping agent. Zinc nitrate was used as starting material and its reduction was carried by phenolic components of Spirulina platensis aqueous extract from Zn2+ to ZnO. The synthesized Zinc oxide nanoparticles are characterized by H1 NMR spectroscopy. Conjugated nanoparticles are characterized physically by Scanning Electron Microscopy (SEM) analysis. SEM demonstrated particle sizes in the range 10–15 nm. ZnO nanoparticles demonstrated antibacterial activity against an isolated plant pathogen Erwinia amylovora. Time kill determination assay was done. Findings: Phenols obtained after Solid Phase Extraction. Hence, this was regarded as the maximum quantified bioactive compound of Spirulina platensis. H1 NMR spectroscopy analyses showed the presence of phenolic compounds and alcohols groups of long chain were also detected. In SEM analysis, the mean diameter of spherical Phenols-ZnOPs is less than 15 nm surrounded by the capping agent. In given time periods of 4, 8, 16, and 24 hour cells, concentrations of 1000µg/mL were 42 %, 33 %, 20 %, and 18 %. At 500 µg/mL of extract concentration, Spirulina platensis inhibited 50% bacterial proliferation (IC50) of Erwinia amylovora. A significant inhibitory effect (p<0.0001) was seen against the plant pathogenic strain. Novelty: In addition to their antibacterial activities, biosynthesized ZnO-NPs are thought to show promise efficacy as growth accelerators. The most dangerous bacterial disease of pear and apple trees is fire blight, caused by Erwinia amylovora. Phenolic capped ZnO-NPs have been found to be efficient plant pathogen antagonists.

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Effect of Carbon Content, Salinity and pH on Spirulina platensis for Phycocyanin, Allophycocyanin and Phycoerythrin Accumulation

Cited by 38 publications

References 42 publications

Crecimiento y pigmentos de Spirulina subsalsa cultivada a diferentes salinidades y concentraciones de nitrógeno

Crecimiento y pigmentos de Spirulina subsalsa cultivada a diferentes salinidades y concentraciones de nitrógeno

Green Synthesis and Characterization of Silver Nanoparticles

Antibacterial Effect of Biosynthesized Zinc Oxide Nanoparticles against Erwinia amylovora and Induction of Crop Growth

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