EVALUAREA IMPACTULUI NANOPARTICULELOR DE OXID DE ZINC ASUPRA TULPINII DE LEVURI PIGMENTATE RHODOTORULA GRACILIS CNMN-Y-03

Alina BEȘLIU, Nadejda EFREMOVA, Agafia USATÎI, Ludmila BATÎR Institutul de Microbiologie și Biotehnologie

Abstract

THE ASSESSMENT OF IMPACT OF ZINC OXIDE NANOPARTICLES ON PIGMENTED YEASTS  RHODOTORULA GRACILIS CNMN-Y-03 

The paper provides new information on the influence of ZnO nanoparticles of <50 nm and <100 nm on pigmented yeast Rhodotorula gracilis CNMN-Y-03. It has been established that the viability, carotenoid and carbohydrate content of the strain has changed according to the size and used concentration. It has been demonstrated that the viability of yeast cells depends on the contact time for both types of nanoparticles. The results have highlighted that concentrations of 1-20 mg/l increased the amount of carbohydrates and maintained the content of carotenoid pigments at the level of the control sample, whereas the concentrations of 30-70 mg/l become toxic for the studied strain. 

Keywords: Rhodotorula gracilis, ZnO nanoparticles, cytotoxicity, cell viability, carotenoid pigments, carbohydrates.