Determinación de Cyanoprokaryotas planctónicas y su potencial en la producción de cianotoxinas en un embalse de la sabana de Bogotá - Colombia

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dc.contributor.advisorMontenegro Ruíz, Luis Carlosspa
dc.contributor.advisorPinilla Agudelo, Gabriel Antoniospa
dc.contributor.authorForero Cujiño, Mario Andrésspa
dc.contributor.corporatenameUniversidad Nacional de Colombiaspa
dc.contributor.researchgroupFisiología del estrés y biodiversidad en plantas y microorganismos - Biodiversidad, biotecnología y conservación de ecosistemasspa
dc.date.accessioned2020-08-06T17:41:32Zspa
dc.date.available2020-08-06T17:41:32Zspa
dc.date.issued2019-12-19spa
dc.description.abstractEl objetivo de este estudio fue determinar las especies de cyanoprokaryotes planctónicas potencialmente productoras de cianotoxinas presentes en el embalse La Regadera (ubicado en la parte sur oriental de la ciudad de Bogotá), y la variación temporal de la comunidad de cyanoprokaryotes en un periodo de 9 meses. Para tal fin se efectuaron muestreos mensuales en dos fases. La primera fase se realizó entre los meses de octubre y noviembre de 2015; y la segunda fase se realizó entre el periodo de enero a julio de 2016. Se realizó el análisis cualitativo y cuantitativo de la comunidad de cyanoprokaryotes presentes en el embalse, así como el montaje de cultivos in vitro utilizando principalmente medio de cultivo BG-11 líquido y sólido (agar). Posteriormente se procedió al aislamiento e identificación de las cepas de cyanoprokaryotes. Además, se caracterizaron molecularmente las especies de cyanoprokaryotes potencialmente toxicas, así como los tipos de cianotoxinas expresadas por las mismas. Los resultados evidenciaron un total de 30 cepas de cyanoprokaryotes aisladas presentes en el embalse La Regadera, las cuales corresponden principalmente a cyanoprokaryotes filamentosas de los géneros Leptolyngbya sp., Lyngbya sp., Phormidium sp. y Planktolyngbya sp. Por otro lado, se evidenció el florecimiento algal (FA) de Aphanizomenon gracile durante el mes de marzo de 2016 (quinto muestreo), el cual presentó el pool genético capaz de expresar la neurotoxina Saxitoxina (STX) que comprende los genes sxtI, sxtA y sxtG. Ninguna de las cepas de cyanoprokaryotes cultivadas in vitro contenía las regiones génicas capaces de expresar las cianotoxinas, microcistina (mcyA, mcyB, mcyC, mcyD, mcyE, mcyG), cilindrospermopsina (AMT, PS, PKS) y anatoxina-a (ANAC-GENF/ANAC-GENR). Estos resultados le permitirán a la Empresa de Acueducto y Alcantarillado de Bogotá reconocer el riesgo de la proliferación de cyanoprokaryotes potencialmente toxicas, con el propósito de activar protocolos preventivos de identificación y cuantificación de cianotoxinas que le garanticen a la población humana el consumo de agua potable libre de estas sustancias (Texto tomado de la fuente).spa
dc.description.abstractThe aim of this study was to identify planktonic cyanoprokaryotic species potential producers of cyanotoxins in La Regadera dam (located at south eastern of Bogotá city) and their temporary variation for 9 months period. To accomplish the target a monthly two-phase sampling was performed; first phase took place between October and November 2015 and second phase was developed between January and July 2016. At the same time, qualitative and quantitative analysis of cyanobacterial community were developed, as well as in vitro culture of strains in BG-11 liquid and solid (agar) culture medium. Subsequently, the isolation and identification of cyanobacteria strains was carried out, as well as the molecular characterization of toxic cyanobacteria and the types of cyanotoxins expressed by them. The results showed a total of 30 isolated strains of cyanobacteria present in the dam which correspond mainly to filamentous cyanobacteria of the genus Leptolyngbya sp., Lyngbya sp., Phormidium sp., and Planktolyngbya sp. On the other hand, in March 2016 (fifth sampling) it was evidenced a Aphanizomenon gracile, algal bloom, which contains a genetic pool able to express the neutrotoxin Saxitoxine (STX), which includes the genes sxtI, sxtA and sxtG. However, none of the cyanobacterial strains in vitro cultured showed the gene regions capable of expressing the cyanotoxins, microcystin (mcyA, mcyB, mcyC, mcyD, mcyE, mcyG); cylinrospermopsin (AMT, PS, PKS), and anatoxin-a (ANAC-GENF / ANAC-GENR). These results are useful to monitoring the potential risk of toxic cyanoprokaryotic proliferation by the Water and Sewerage Company of Bogotá city and to allow implementing preventive identification and quantification protocols in order to guaranty potable water availability for human population.eng
dc.description.degreelevelMaestríaspa
dc.format.extent213spa
dc.format.mimetypeapplication/pdfspa
dc.identifier.citationForero, M. (2019). Determinación de Cyanoprokaryotas planctónicas y su potencial en la producción de cianotoxinas en un embalse de la sabana de Bogotá - Colombia. (tesis de maestría). Universidad Nacional de Colombia.spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/77965
dc.language.isospaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.programBogotá - Ciencias - Maestría en Ciencias - Biologíaspa
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dc.rights.licenseAtribución-NoComercial 4.0 Internacionalspa
dc.rights.spaAcceso abiertospa
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/spa
dc.subject.ddc570 - Biologíaspa
dc.subject.ddc577 - Ecologíaspa
dc.subject.ddc628 - Ingeniería sanitariaspa
dc.subject.proposalCyanoprokaryotesspa
dc.subject.proposalCyanoprokaryoticeng
dc.subject.proposalCyanotoxinseng
dc.subject.proposalCianotoxinasspa
dc.subject.proposalSaxitoxina (STX)spa
dc.subject.proposalSaxitoxine (STX)eng
dc.subject.proposalMicrocistina (MC)spa
dc.subject.proposalMicrocystine (MC)eng
dc.subject.proposalEmbalse La Regaderaspa
dc.subject.proposalLa Regadera dameng
dc.subject.proposalAgua potablespa
dc.subject.proposalPotable Watereng
dc.subject.proposalHuman healtheng
dc.subject.proposalSalud humanaspa
dc.titleDeterminación de Cyanoprokaryotas planctónicas y su potencial en la producción de cianotoxinas en un embalse de la sabana de Bogotá - Colombiaspa
dc.typeDocumento de trabajospa
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Tesis de Maestría en Ciencias - Biología
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Maestría en Ciencias - Biología