15 results on '"Hernández-Zulueta, Joicye"'
Search Results
2. Microbial Dynamics in Ophthalmic Health: Exploring the Interplay between Human Microbiota and Glaucoma Pathogenesis
- Author
-
Hernández-Zulueta, Joicye, primary, Bolaños-Chang, Andres J., additional, Santa Cruz-Pavlovich, Francisco J., additional, Valero Rodríguez, América D., additional, Lizárraga Madrigal, Alejandro, additional, Del Rio-Murillo, Ximena I., additional, Navarro-Partida, José, additional, and Gonzalez-De la Rosa, Alejandro, additional
- Published
- 2024
- Full Text
- View/download PDF
3. Metabarcoding the Bacterial Assemblages Associated with Toxopneustes roseus in the Mexican Central Pacific.
- Author
-
Hernández-Zulueta, Joicye, Rubio-Bueno, Sharix, Zamora-Tavares, María del Pilar, Vargas-Ponce, Ofelia, Rodríguez-Troncoso, Alma Paola, and Rodríguez-Zaragoza, Fabián A.
- Subjects
SEA urchins ,GENETIC barcoding ,MICROBIAL ecology ,CORALS ,PHYSIOLOGY ,CORAL bleaching ,NATIONAL parks & reserves - Abstract
The Mexican Central Pacific (MCP) region has discontinuous coral ecosystems with different protection and anthropogenic disturbance. Characterizing the bacterial assemblage associated with the sea urchin Toxopneustes roseus and its relationship with environmental variables will contribute to understanding the species' physiology and ecology. We collected sea urchins from coral ecosystems at six sites in the MCP during the summer and winter for two consecutive years. The spatial scale represented the most important variation in the T. roseus bacteriome, particularly because of Isla Isabel National Park (PNII). Likewise, spatial differences correlated with habitat structure variables, mainly the sponge and live coral cover. The PNII exhibited highly diverse bacterial assemblages compared to other sites, characterized by families associated with diseases and environmental stress (Saprospiraceae, Flammeovirgaceae, and Xanthobacteraceae). The remaining five sites presented a constant spatiotemporal pattern, where the predominance of the Campylobacteraceae and Helicobacteraceae families was key to T. roseus' holobiont. However, the dominance of certain bacterial families, such as Enterobacteriaceae, in the second analyzed year suggests that Punto B and Islas e islotes de Bahía Chamela Sanctuary were exposed to sewage contamination. Overall, our results improve the understanding of host-associated bacterial assemblages in specific time and space and their relationship with the environmental condition. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. Evaluación de la actividad antimicrobiana de Bacillus australimaris y Pseudoalteromonas sp. asociadas al octocoral Leptogorgia alba
- Author
-
Avila Castro, Elizabeth, Vargas Ponce, Ofelia, Díaz Pérez, Leopoldo, Rodríguez Zaragoza, Fabián A., Hernández Zulueta, Joicye, Aguila Ramírez, Ruth N., Avila Castro, Elizabeth, Vargas Ponce, Ofelia, Díaz Pérez, Leopoldo, Rodríguez Zaragoza, Fabián A., Hernández Zulueta, Joicye, and Aguila Ramírez, Ruth N.
- Abstract
Octocoral-associated bacterial assemblages provide them with defensive strategies through production of antimicrobial compounds, protecting against pathogenic microorganisms by avoiding colonization by other microorganisms. Due to the decrease in the discovery of new compounds in terrestrial environments, the potential of marine bacterial strains represents a source of novel bioactive compounds. Our objective was to evaluate the antimicrobial activity of the bacterial strains of Bacillus australimaris and those of Pseudoalteromonas sp. isolated from the octocoral Leptogorgia alba from shallow and mesophotic areas, to determine the degree of capacity they have to inhibit the growth of human and aquaculture pathogens, for which cross-streak tests, agar diffusion by drop, well diffusion, disk diffusion, growth on cellulose and polystyrene microplate were used. Antagonism of B. australimaris was evident towards pathogens Escherichia coli, Listonella anguillarum, Listeria monocytogenes, Pseudomonas aeruginosa, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus iniae, and Vibrio campbellii. For its part, Pseudoalteromonas sp. prevented the development of the pathogens E. coli, L. anguillarum, L. monocytogenes, S. iniae, and V. campbellii. The results of this work show that bacteria associated with gorgonid organisms are a potential biotechnological resource in antimicrobial activity., Los ensamblajes bacterianos asociados a los octocorales les aportan estrategias defensivas mediante la producción de compuestos antimicrobianos para protección frente a los microorganismos patógenos al evitar la colonización por otros microorganismos. Debido a la disminución en el descubrimiento de nuevos compuestos en los entornos terrestres, el potencial de las cepas bacterianas marinas representa una fuente de novedosos compuestos bioactivos. Nuestro objetivo fue evaluar la actividad antimicrobiana de las cepas bacterianas de Bacillus australimaris y las de Pseudoalteromonas sp. aisladas del octocoral Leptogorgia alba de las zonas someras y de las mesofóticas, para conocer el grado de capacidad que tienen para inhibir el crecimiento de los patógenos humanos y de los acuícolas por lo que se realizaron los ensayos cross-streak, difusión en agar por gota, difusión en pozo, difusión en disco, crecimiento sobre celulosa y microplaca de poliestireno. El antagonismo de B. australimaris fue evidente hacia los patógenos de Escherichia coli, Listonella anguillarum, Listeria monocytogenes, Pseudomonas aeruginosa, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus iniae, y Vibrio campbellii. Por su parte, Pseudoalteromonas sp. impidió el desarrollo de los patógenos E. coli, L. anguillarum, L. monocytogenes, S. iniae, y V. campbellii. Los resultados de este trabajo muestran que las bacterias asociadas a organismos gorgónidos son un recurso biotecnológico potencial en la actividad antimicrobiana.
- Published
- 2023
5. An Update of Knowledge of the Bacterial Assemblages Associated with the Mexican Caribbean Corals Acropora palmata , Orbicella faveolata, and Porites porites.
- Author
-
Hernández-Zulueta, Joicye, Díaz-Pérez, Leopoldo, Echeverría-Vega, Alex, Nava-Martínez, Gabriela Georgina, García-Salgado, Miguel Ángel, and Rodríguez-Zaragoza, Fabián A.
- Subjects
- *
CORALS , *PORITES , *ACROPORA , *OCEAN temperature , *DENITRIFICATION , *MICROBIAL ecology - Abstract
In this study, the bacterial microbiota associated with apparently healthy corals of Acropora palmata, Orbicella faveolata, and Porites porites and the surrounding seawater and sediment were evaluated via the MiSeq Illumina sequencing of the V4 region of 16S rRNA at three reef sites in the Mexican Caribbean. Bacterial assemblages associated with apparently healthy corals and sediments showed no significant differences between sites. The colonies of A. palmata showed a dominance of families Amoebophilaceae, Spirochaetaceae, Myxococcaceae, and Cyclobacteriaceae. Meanwhile, the colonies of O. faveolata and P. porites revealed a high prevalence of the Rhodobacteraceae and Kiloniellaceae families. The families Rhodobacteraceae, Cryomorphaceae, Cyanobiaceae, and Flavobacteriaceae were predominant in seawater samples, while Pirellulaceae, Nitrosococcaceae, and Woeseiaceae were predominant in sediments. Variations in A. palmata bacterial assemblages were correlated with salinity, sea surface temperature, and depth. These variables, along with nitrate, phosphate, and ammonium concentrations, were also correlated with changes in the bacterial composition of P. porites, seawater, and sediments. However, none of the environmental variables were related to the bacterial taxa of O. faveolata. Aerobic chemoheterotrophy and fermentation, followed by nitrate reduction and ureolysis, were the metabolic functions with the highest occurrence in the bacterial assemblages associated with all substrates. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
6. An insight on the eye bacterial microbiota and its role on dry eye disease
- Author
-
Hernández‐Zulueta, Joicye, primary, Navarro‐Partida, José, additional, Sánchez‐Aguilar, Oscar Eduardo, additional, Cruz‐Pavlovich, Héctor Daniel Santa, additional, Castro‐Castañeda, Carlos Rodrigo, additional, and González‐De la Rosa, Alejandro, additional
- Published
- 2023
- Full Text
- View/download PDF
7. Core microbiome of corals Pocillopora damicornis and Pocillopora verrucosa in the northeastern tropical Pacific
- Author
-
Ostria‐Hernández, Martha L., primary, Hernández‐Zulueta, Joicye, additional, Vargas‐Ponce, Ofelia, additional, Díaz‐Pérez, Leopoldo, additional, Araya, Rubén, additional, Rodríguez‐Troncoso, Alma P., additional, Ríos‐Jara, Eduardo, additional, and Rodríguez‐Zaragoza, Fabián A., additional
- Published
- 2022
- Full Text
- View/download PDF
8. Bacterial assemblages associated with Acropora palmata affected by white band disease in the Mexican region of the Caribbean and Gulf of Mexico
- Author
-
Hernández-Zulueta, Joicye, primary, Díaz-Pérez, Leopoldo, additional, García-Maldonado, José Q., additional, Nava-Martínez, Gabriela Georgina, additional, García-Salgado, Miguel Ángel, additional, and Rodríguez-Zaragoza, Fabián Alejandro, additional
- Published
- 2022
- Full Text
- View/download PDF
9. Structure and spatial variation of the hermatypic coral assemblages of the southern coast of Jalisco, in the Mexican Central Pacific
- Author
-
Hernández-Zulueta, Joicye, primary, Díaz-Pérez, Leopoldo, additional, Galván-Villa, Cristian Moisés, additional, Ayón-Parente, Manuel, additional, Gómez-Petersen, Pastora, additional, Godínez-Domínguez, Enrique, additional, and Rodríguez-Zaragoza, Fabián Alejandro, additional
- Published
- 2021
- Full Text
- View/download PDF
10. Bacterial assemblages associated with coral species of the Mexican Central Pacific
- Author
-
Hernández-Zulueta, Joicye, Díaz-Pérez, Leopoldo, Araya, Rubén, Vargas-Ponce, Ofelia, Rodríguez-Troncoso, Alma P, Ríos-Jara, Eduardo, Ortiz, Marco, and Rodríguez-Zaragoza, Fabián A
- Subjects
Mexican Pacific ,Pacífico mexicano ,spatial-temporal variation ,Ensamblajes bacterianos ,variación espacio-temporal ,DGGE ,Bacterial assemblages ,Pocillopora corals ,corales Pocillopora - Abstract
The functional role of coral-associated bacteria and their contribution to coral health is still largely unknown. The first necessary step to address this gap in the knowledge is based on characterization of the microbial assemblage of the coral and the species-specific, temporal and spatial variation in its diversity. Branched corals (e.g., genus Pocillopora), are the main builders of coral reefs worldwide. This study evaluated the bacteria associated with the mucus and tissues of Pocillopora damicornis and Pocillopora verrucosa, as well as that of the seawater and surrounding sediments, in 6 sites of the Mexican Central Pacific during summer and winter seasons. The molecular techniques DGGE and RFLP were used with the 16S rDNA to assess the most abundant bacterial OTUs. The relationships between the bacterial-coral assemblage and environmental and spatial variables of the reef surroundings were also evaluated, using the multivariate analyses. Twenty different Operational Taxonomic Units (OTU) were obtained, with the highest number presented by the sediments. Specificity of bacterial groups was found for each coral species, as well as between the tissue and mucus of each species. The results showed that the bacterial dominant groups were similar between seasons, but these showed significant spatial variations among substrates within sites, as well as per substrate across all sites. The environmental variables that explained the variation of the dominant bacterial groups in corals and sea water were the coverages of fleshy macroalgae, live coral and sponge. In contrast, variation in the sediments was explained by the coverages of sand, rubble and rock. El papel funcional de las bacterias asociadas a corales y su contribución a la salud del coral es aún desconocido en gran medida. Es necesario que primero se caracterice el ensamblaje microbiano del coral y sus cambios en la diversidad a través de las especies de coral, el espacio y tiempo. Los corales ramificados (e.g., género Pocillopora) son los principales constructores arrecifales a nivel mundial. Este estudio evaluó la estructura bacteriana asociada al mucus y tejidos de Pocillopora damicornis y Pocillopora verrucosa, así como del agua de mar y sedimentos circundantes en 6 sitios del Pacífico central mexicano. Se emplearon las técnicas DGGE y RFLP del ADNr 16S para generar los perfiles de bandeo o evaluar la diversidad. Además, se evaluó la relación del ensamblaje bacteriano-coral con variables ambientales y espaciales del entorno arrecifal (de cada sitio), utilizando análisis multivariados. Se obtuvieron 20 Unidades Taxonómicas Operacionales (OTU) diferentes, siendo los sedimentos los que presentaron mayor número. Se encontró una especificidad de grupos bacterianos para cada especie de coral, así como entre el tejido y mucus de cada especie. Los resultados mostraron que los grupos de bacterias dominantes variaron entre sustratos y entre sitios, encontrando, sólo una variación espacial significativa. Las variables ambientales que explican la variación de los grupos bacterianos dominantes en corales y agua de mar fueron las coberturas de macroalgas carnosas, coral vivo y esponja. En cambio, la variación en los sedimentos fue explicada por las coberturas de arena, escombro y roca.
- Published
- 2017
11. Bacterial assemblages associated with coral species of the Mexican Central Pacific
- Author
-
Hernández Zulueta, Joicye, Díaz Pérez, Leopoldo, Araya, Rubén, Vargas Ponce, Ofelia, Ríos-Jara, Eduardo, Rodríguez Zaragoza, Fabián A., Ortiz, Marco A., Rodríguez Troncoso, Alma Paola, Hernández Zulueta, Joicye, Díaz Pérez, Leopoldo, Araya, Rubén, Vargas Ponce, Ofelia, Ríos-Jara, Eduardo, Rodríguez Zaragoza, Fabián A., Ortiz, Marco A., and Rodríguez Troncoso, Alma Paola
- Abstract
El papel funcional de las bacterias asociadas a corales y su contribución a la salud del coral es aún desconocido en gran medida. Es necesario que primero se caracterice el ensamblaje microbiano del coral y sus cambios en la diversidad a través de las especies de coral, el espacio y tiempo. Los corales ramificados (e.g., género Pocillopora) son los principales constructores arrecifales a nivel mundial. Este estudio evaluó la estructura bacteriana asociada al mucus y tejidos de Pocillopora damicornis y Pocillopora verrucosa, así como del agua de mar y sedimentos circundantes en 6 sitios del Pacífico central mexicano. Se emplearon las técnicas DGGE y RFLP del ADNr 16S para generar los perfiles de bandeo o evaluar la diversidad. Además, se evaluó la relación del ensamblaje bacteriano-coral con variables ambientales y espaciales del entorno arrecifal (de cada sitio), utilizando análisis multivariados. Se obtuvieron 20 Unidades Taxonómicas Operacionales (OTU) diferentes, siendo los sedimentos los que presentaron mayor número. Se encontró una especificidad de grupos bacterianos para cada especie de coral, así como entre el tejido y mucus de cada especie. Los resultados mostraron que los grupos de bacterias dominantes variaron entre sustratos y entre sitios, encontrando, sólo una variación espacial significativa. Las variables ambientales que explican la variación de los grupos bacterianos dominantes en corales y agua de mar fueron las coberturas de macroalgas carnosas, coral vivo y esponja. En cambio, la variación en los sedimentos fue explicada por las coberturas de arena, escombro y roca., The functional role of coral-associated bacteria and their contribution to coral health is still largely unknown. The first necessary step to address this gap in the knowledge is based on characterization of the microbial assemblage of the coral and the species-specific, temporal and spatial variation in its diversity. Branched corals (e.g., genus Pocillopora), are the main builders of coral reefs worldwide. This study evaluated the bacteria associated with the mucus and tissues of Pocillopora damicornis and Pocillopora verrucosa, as well as that of the seawater and surrounding sediments, in 6 sites of the Mexican Central Pacific during summer and winter seasons. The molecular techniques DGGE and RFLP were used with the 16S rDNA to assess the most abundant bacterial OTUs. The relationships between the bacterial-coral assemblage and environmental and spatial variables of the reef surroundings were also evaluated, using the multivariate analyses. Twenty different Operational Taxonomic Units (OTU) were obtained, with the highest number presented by the sediments. Specificity of bacterial groups was found for each coral species, as well as between the tissue and mucus of each species. The results showed that the bacterial dominant groups were similar between seasons, but these showed significant spatial variations among substrates within sites, as well as per substrate across all sites. The environmental variables that explained the variation of the dominant bacterial groups in corals and sea water were the coverages of fleshy macroalgae, live coral and sponge. In contrast, variation in the sediments was explained by the coverages of sand, rubble and rock.
- Published
- 2017
12. Bacterial assemblages associated with coral species of the Mexican Central Pacific
- Author
-
Hernández-Zulueta, Joicye, primary, Díaz-Pérez, Leopoldo, additional, Araya, Rubén, additional, Vargas-Ponce, Ofelia, additional, Rodríguez-Troncoso, Alma P, additional, Ríos-Jara, Eduardo, additional, Ortiz, Marco, additional, and Rodríguez-Zaragoza, Fabián A, additional
- Published
- 2017
- Full Text
- View/download PDF
13. Multi-scale analysis of hermatypic coral assemblages at Mexican Central Pacific
- Author
-
Hernández-Zulueta, Joicye, primary, Rodríguez-Zaragoza, Fabián A., additional, Araya, Rubén, additional, Vargas-Ponce, Ofelia, additional, Rodríguez-Troncoso, Alma P., additional, Cupul-Magaña, Amílcar L., additional, Díaz-Pérez, Leopoldo, additional, Ríos-Jara, Eduardo, additional, and Ortiz, Marco, additional
- Published
- 2017
- Full Text
- View/download PDF
14. Bacterial microbiota associated to the cultures of two species of benthic microalgae
- Author
-
Hernández-Zulueta, Joicye, Leal, Sylvia, and Loza, Sandra
- Subjects
Navicula germanopolonica ,Bacterial microbiota ,Bacterial characterization ,Benthic diatoms ,Amphora sp ,Microalgae culture - Abstract
Las diatomeas bentónicas forman biopelículas debido a las sustancias que secretan, que les permite mantenerse adheridas al sustrato. A ellas se asocian bacterias que, dada las condiciones no axénicas de los cultivos, pueden alterar su valor nutricional. El objetivo del presente trabajo fue caracterizar la microbiota bacteriana asociada a los cultivos de las microalgas bentónicas Navicula germanopolonica y Amphora sp., especies utilizadas para la precría del camarón en cultivo. Se aislaron e identificaron las 10 colonias más abundantes que aparecieron en los cultivos de cada especie. Las características macro y microscópicas se determinaron por el método de Brown (2012) y para la identificación se empleó la metodología API 20 NE y API 50 CHB para bacilos Gram negativos no enterobacterias y bacilos esporulados Gram positivos respectivamente. Se determinaron las actividades antibacteriana, amilolítica, hemolítica, proteolítica y lipolítica de algunas cepas. El alto porcentaje de bacilos Gram positivos esporulados, asociados a los cultivos de las microalgas estudiadas, le confieren un efecto probiótico cuando estos se utilizan en la alimentación de organismos acuáticos. Las bacterias del género Bacillus fueron las más abundantes y las de mayores capacidades bioactivas, por lo que resultan una fuente potencial de obtención de estas sustancias. La microbiota bacteriana que se encontró en los cultivos de N. germanopolonica y Amphora sp. evidencian las potencialidades de la misma, ya que en la actualidad se ha incrementado la búsqueda de sustancias de interés a partir de fuentes marinas. Published caracterización bacteriana; cultivo de microalgas; diatomeas bentónicas; microbiota bacteriana, Navicula germanopolonica, Amphora sp.
- Published
- 2014
15. First deep screening of bacterial assemblages associated with corals of the Tropical Eastern Pacific
- Author
-
Hernández-Zulueta, Joicye, primary, Araya, Rubén, additional, Vargas-Ponce, Ofelia, additional, Díaz-Pérez, Leopoldo, additional, Rodríguez-Troncoso, Alma P., additional, Ceh, Janja, additional, Ríos-Jara, Eduardo, additional, and Rodríguez-Zaragoza, Fabián A., additional
- Published
- 2016
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.