EFFECT OF TRIFLURALIN, ZERO-VALENT IRON AND MAGNETITE NANOPARTICLES ON GROWTH OF STREPTOMYCETES

Universitatea din Oradea. Analele. Fascicula Biologie

Olga POSTOLACHI¹ 

关键词: streptomycetes;    iron nanoparticles;    trifluralin;    growth inhibition;   

DOI  :  

学科分类：生物科学（综合）

来源: Editura Universitatii din Oradea / University of Oradea Publishing House

【 摘 要 】

Among actinomycetes the genus Streptomyces is the most widely studied and well known. Ecologically, streptomycetes, due to their extracellular enzymes, have a great potential for biodegradation of organic and inorganic toxic compounds. Among metal-based engineered nanomaterials, iron nanoparticles (NPs) are, probably, the most used for bioremediation of a broad spectrum of pollutants. Iron-based NPs are expected to be non-toxic, due to the use of Fe atom in several pathways of cell metabolism and, therefore, low iron toxicity. The present study aims to determine the effect of magnetite NPs, zero-valent iron NPs and fluorinated dinitroaniline herbicide trifluralin on growth of streptomycetes strains. Streptomycetes strains were isolated from soil long-term polluted with obsolete pesticides, DDT and trifluralin. The inhibition activity of iron NPs and trifluralin was evaluated using express-method. Each streptomycete strain had an individual reaction to the solutions of iron NPs. Most of the studied microorganisms were found to be sensitive to trifluralin, except Streptomyces sp. 0112 and Streptomyces sp. 0212. Cytotoxic effect of trifluralin was diminished by iron NPs, but not fully reduced. Fe(0) NPs produced no inhibitory effect on growth of streptomycetes. The obtained data has revealed the prospect of developing a procedure for bioremediation of soils polluted with trifluralin, using the phenomenon of synergism between iron NPs and streptomycetes.

【 授权许可】

Unknown