A5090862984- Pesticide and Herbicide Environmental Studies
- Microbial bioremediation and biosurfactants
- Insect Pest Control Strategies
- Pharmaceutical and Antibiotic Environmental Impacts
- Traditional and Medicinal Uses of Annonaceae
- Enzyme Production and Characterization
- Insect-Plant Interactions and Control
- Plant-Microbe Interactions and Immunity
- Fungal Biology and Applications
- Polar Research and Ecology
- Plant and animal studies
- Essential Oils and Antimicrobial Activity
- Nanoparticles: synthesis and applications
- Microbial Community Ecology and Physiology
- Plant Pathogens and Fungal Diseases
- Allelopathy and phytotoxic interactions
- Fern and Epiphyte Biology
- Synthetic Organic Chemistry Methods
- Pesticide Residue Analysis and Safety
- Marine Sponges and Natural Products
- Microbial Metabolism and Applications
- Plant biochemistry and biosynthesis
- Nanocomposite Films for Food Packaging
- Medicinal Plants and Neuroprotection
- Biological Control of Invasive Species
Universidad de La Frontera
2017-2024
Universidade Federal do ABC
2019
University of Bío-Bío
2011-2013
In this study, we selected and characterized different pesticide-tolerant bacteria isolated from a biomixture of biopurification system that had received continuous applications pesticides mixture. The amplicon analysis reported the phyla Proteobacteria, Firmicutes, Bacteroidetes Actinobacteria were predominant. Six strains grew in presence chlorpyrifos iprodione. Biochemical characterization showed all isolates positive for esterase, acid phosphatase, among others, they identified as...
Abstract Antarctic have been suggested as an attractive source for antibiotics discovery and members of Streptomyces genus historically studied natural producers antimicrobial metabolites. Nonetheless, our knowledge on antibiotic-producing from is very limited. In this study, the activity organic extracts strains was evaluated by disk diffusion assays minimum inhibitory concentration. The strain sp. So13.3 showed greatest antibiotic (MIC = 15.6 μg/mL) against Gram-positive bacteria growth...
Biosurfactants, a wide group of compounds produced by different microorganisms, generally have less toxicity and are more biodegradable than synthetic surfactants. Biosurfactant-producing bacteria can be found in contaminated environments, such as soils receiving pesticide applications constantly, or pesticides treatment systems where microorganisms adapted to biodegrading pesticides. Five pesticide-tolerant previously isolated from biopurification system were evaluated...
The present study aimed to identify novel microbial producers of bioemulsificant compounds from Antarctic soils. Fifty-nine strains were isolated five different locations at South Shetland Islands, Antarctica, and screened for biosurfactant production by β-hemolytic activity. Strain So 3.2 was determined as bioemulsifier-producer identified phenotypic molecular characterization Streptomyces luridus. Emulsification activity, oil displacement method drop-collapsing test performed evaluate the...
This study provides the basis for implementing a continuous treatment system wastewater containing pesticide mixture formed by atrazine, iprodione, and chlorpyrifos. Two fungal strains (Verticilium sp. H5 Metacordyceps H12) isolated from biomixture of biopurification were able to remove different concentrations (10 50 mg L−1) efficiently liquid medium; however, half-life pesticides was reduced characterized T1/2 5.4 9.2 d 3.7 5.8 2.6 2.9 chlorpyrifos using consortium. The immobilization...
The production and characterization of lipopeptide biosurfactants obtained from a novel bacterial strain Bacillus amyloliquefaciens C11 isolated biopurification system, to enhance the solubility three pesticides environmental concern was investigated. Biosurfactant by B. evaluated in 2-L reactor characterized chromatographic spectroscopic methods. associated with growth glucose consumption. produced biosurfactant decreased surface tension water 72 28 mN m-1 at 24 h incubation, critical...
Biosurfactant-producing bacteria can be found in contaminated environments such as biopurification systems (BPS) for pesticide treatments. A total of 18 isolates were screened to determine their ability produce extracellular biosurfactants, using olive oil the main carbon source. Out eighteen isolates, two strains (C11 and C27) selected biosurfactant production. The emulsification activities C11 C27 sunflower was 58.4 53.7%, respectively, 46.6 48.0% oil. Using molecular techniques MALDI-TOF,...
The extreme weather conditions in the Antarctic have exerted selective pressures favoring differential features bacteria to survive this untapped environment (i.e., antibiotic molecules). Notably, higher chances of discovery from extremophiles been proposed recently. Althoughnew organic and environmentally friendly sources for helping control plant pathogenic fungi are necessary, information about anti-phytopathogenic applications extremophile microorganisms environments is limited. In...
Abstract Background Discarded potato is the most abundant waste and represents a worldwide disposal problem to industry. This agricultural contains valuable nutrients that could be used as substrate obtain diverse high value-added microbial products, such biopigments. The aim of this work was evaluate use discarded sole source for producing blue pigments by Streptomyces lydicus PM7 through submerged fermentation. Results Initially, traditional culture medium ISP2 established suitable...
The genus Blechnum has 13 species that are common plants, well-distributed in Chile. Here, we report a phytochemical analysis of B. chilense (Kaulf.) Mett., as well the insecticidal effects extracts this plant. From n-hexane fraction four phytoecdysones were isolated: ecdysone, ponasterone, shidasterone and 2-deoxycrustecdysone. A bioassay with Drosophila melanogaster larvae was used to evaluate activity. EtOAc fractions at 800 ppm caused 66.7 50.0% larval mortality, respectively. Treatments...
The fungicide iprodione (IPR) (3-(3,5-dichlorophenyl) N-isopropyl-2,4-dioxoimidazolidine-1-carboxamide) is a highly toxic compound. Although IPR has been restricted, it still being applied in many places around the world, constituting an environmental risk. biodegradation of attractive option for reducing its residues. In this study, we isolated thirteen IPR-tolerant bacteria from biopurification system designed to treat pesticides. A study using different strains was comparatively...
The genus Blechnum has 13 common and well-distributed species in Chile [1]. B. chilense plants have been used for various purposes [1,2]. Tetranychus urticae Koch is highly polyphagous with 1094 host plant reported worldwide to date [3]. In this research, we report a phytochemical analysis of its mite growth regulatory effects. From the n-hexane fraction four phytoecdysones were isolated: ecdysone, ponasterone, shidasterone 2-deoxycrustecdysone. We conducted bioassay T. eggs placed on...
RESUMEN:En los últimos años microorganismos tales como hongos, levaduras y, en especial, las bacterias han sido utilizadas para realizar biosíntesis de nanopartículas.Existen varios tipos descritas productoras nanopartículas, sin embargo, psicrófilas y psicrotolerantes no ampliamente estudiadas, aun cuando su utilización la producción nanopartículas podría entregar ventajas relacionadas con estabilidad, el gasto energético producción, al mismo tiempo que son una alternativa amigable medio...