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dc.contributor.advisorPosada Buitrago, Martha Lucía
dc.contributor.authorCastillo Usma, Claudia Lorena
dc.contributor.authorGuzmán Florez, Andrea Carolina
dc.date.accessioned2022-03-07T16:35:01Z
dc.date.available2022-03-07T16:35:01Z
dc.date.issued2018
dc.identifier.urihttps://repositorio.unicolmayor.edu.co/handle/unicolmayor/4778
dc.description.abstractLa Antártida, continente blanco del hemisferio Austral, cuenta con 14 millones de km2 , es la reserva de agua dulce más abundante del mundo y punto de equilibrio de los ecosistemas, presenta factores climáticos extremos para la vida lo que lo convierte en un campo abierto para la investigación científica. En este continente, los suelos poseen gran diversidad bacteriana, con escasa identificación; Por lo anterior el presente trabajo tuvo como objetivo principal estudiar la diversidad de microorganismos cultivables provenientes de suelos de la isla Livingston y Decepciòn en la Antártida. La identificación de los organismos procariotas se logró mediante microbiología tradicional y secuenciación del producto de amplificación por PCR de la región 16S del rRNA. Se aislaron 20 microorganismos bacterianos provenientes de estas Islas, de los cuales se identificaron tres géneros Bacterianos por microbiología convencional: Salmonella sp., Burkholderia sp., Bacillus sp. y Acinetobacter sp. y un microorganismo de origen fúngico perteneciente al género Penicillium sp. Las secuencias obtenidas fueron editadas con el programa Chromas (2.6.5) y comparadas con el GenBank a través del algoritmo BLASTn. Se identificaron 17 microorganismos del total de aislados, pertenecientes a 11 géneros bacterianos distribuidos en las dos islas; 8 géneros correspondientes a la Isla Decepción: Staphylococcus, Oceanisphera, Paeniglutamicibacter, Microbacterium, Sporosarcina y 6 géneros a la isla Livingston: Burkholderia, Bacillus, y Acinetobacter, de los géneros identificados tres coincidieron para ambas islas Brevundimonas, Arthrobacter y Pseudomonas. La excepcional plasticidad genómica de estos microorganismos, proporciona a la comunidad científica el potencial para futuros estudios relacionados con bioprospección.spa
dc.description.abstractAntarctica, white continent of the southern hemisphere, has 14 million km2, is the reserve of fresh water, most abundant, world and equilibrium point of ecosystems, has extreme climatic factors for life which makes it an open field for Scientific research. In this continent, the soils have great bacterial diversity, with little identification; With regard to the diversity of microorganisms from the island of Livingston and Deception in Antarctica. The identification of prokaryotic organisms is carried out by means of traditional microbiology and sequencing of the PCR amplification product of the 16S rRNA region. We isolated 20 bacterial microorganisms from these islands, of which four Bacterial genera were identified by conventional microbiology: Salmonella sp., Burkholderia sp., Bacillus sp. and Acinetobacter sp. And a microorganism of fungal origin belonging to the genus Penicillium sp. The sequences were edited with the Chromas program (2.6.5) and compared with the GenBank through the BLASTn algorithm. Seventeen microorganisms were identified from the total of the isolates, belonging to 11 bacterial genera distributed in the two islands; 8 genera corresponding to Deception Island: Staphylococcus, Oceanisphera, Paeniglutamicibacter, Microbacterium, Sporosarcina and 6 genera to Livingston Island: Burkholderia, Bacillus, and Acinetobacter, and the genera of it coincide. The exceptional genomic plasticity of these microorganisms, the results of scientific research and the potential for future studies related to bioprospectingeng
dc.description.tableofcontentsÍNDICE DE FIGURAS 10 ÍNDICE DE TABLAS 12 RESUMEN 13 INTRODUCCIÓN 17 OBJETIVO GENERAL 18 OBJETIVOS ESPECÍFICOS 18 ANTECEDENTES 19 2. MARCO REFERENCIAL 23 2.1. Antártida 23 2.1.2. Tratado Antártico 26 2.1.3 Suelo antártico 27 2.2 Isla Decepción 29 2.3 Isla Livingston 30 2.4. Microorganismos extremófilos 31 2.5. Clasificación de los microorganismos según la temperatura 32 2.5.1 Microorganismos psicrófilos 32 2.5.2 Microorganismos termófilos 34 2.5.3 Hongos psicrófilos 35 2.6. Identificación molecular de microorganismos mediante amplificación y secuenciación. 36 2.6.1. Extracción de ADN. 36 2.6.2 Amplificación de ADN mediante PCR 36 2.6.3 Pasos para realizar Amplificación de ADN mediante PCR 37 2.6.4. Secuenciación de productos de amplificación 38 2.6.4.1 Secuenciación mediante el método Sanger. 38 3. DISEÑO METODOLÓGICO 39 3.1 Universo, población, muestra 39 3.2 Hipótesis, Variables, indicadores 39 3.3 Técnicas y procedimientos 40 3.3.1 Tratamiento de la muestra 41 Fase 1. Muestreo 41 Fase 2. Aislamiento microbiológico en caldos 43 Fase 3. Estudio macroscópico y microscópico 46 Fase 4. Aislamiento en Medios de cultivo 47 Fase 5. Identificación BBL CRYSTAL 47 Fase 5.1 Alistamiento de las muestras para biología molecular 47 Fase 6. Biología molecular 48 4. RESULTADOS 50 4.1 Crecimiento de las muestras provenientes de la isla livingston y Decepción en medio de cultivo líquido. 50 4.2 Obtención de cepas puras provenientes de las islas Livingston y Decepción de la Antártida. 53 4.3 Microorganismos identificados con BBL Crystal 57 4.3 Electroforesis de productos de PCR de la región 16S rRNA a partir del ADN extraído de cepas aisladas de muestras provenientes de las Islas Livingston y Decepción en la Antártida. Los productos de PCR presentan el tamaño esperado,1500pb-1800pb. 58 4.4 Resultado de la secuenciación de los productos de amplificación de PCR . 59 4.3 Crecimiento en medios de cultivo (aislamiento fúngico). 62 DISCUSIÓN 64 7. REFERENCIAS BIBLIOGRÁFICAS 72 ANEXOS 85spa
dc.format.extent106p.spa
dc.format.mimetypeapplication/pdfspa
dc.language.isospaspa
dc.publisherUniversidad Colegio Mayor de Cundinamarcaspa
dc.rightsDerechos Reservados - Universidad Colegio Mayor de Cundinamarca, 2018spa
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/spa
dc.titleEstudio de la Microbiota cultivable de suelos en dos zonas de la Antártidaspa
dc.typeTrabajo de grado - Pregradospa
dc.description.degreelevelPregradospa
dc.description.degreenameBacteriólogo(a) y Laboratorista Clínicospa
dc.identifier.barcode58660
dc.publisher.facultyFacultad de Ciencias de la Saludspa
dc.publisher.placeBogotá D.Cspa
dc.publisher.programBacteriología y Laboratorio Clínicospa
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dc.subject.proposalCultivo microbiológicospa
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dc.subject.proposalMicroorganismo fúngicospa
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