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    Biosurfactants produced by metal-resistant Pseudomonas aeruginosa isolated from Zea mays rhizosphere and compost

    Biosurfactants produced by metal-resistant Pseudomonas aeruginosa isolated from Zea mays rhizosphere and compost

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    Author
    Aguirre-Noyola, José Luis
    Romero Ramírez, Yaneth
    Ruvalcaba Ledezma, Jesus Carlos
    Forero Forero, Angela Victoria
    León Rodríguez, Renato
    Toribio Jimenez, Jeyri
    Publisher
    Universidad Nacional Abierta y a Distancia, UNAD

    Citación

           
    TY - GEN T1 - Biosurfactants produced by metal-resistant Pseudomonas aeruginosa isolated from Zea mays rhizosphere and compost AU - Aguirre-Noyola, José Luis AU - Romero Ramírez, Yaneth AU - Ruvalcaba Ledezma, Jesus Carlos AU - Forero Forero, Angela Victoria AU - León Rodríguez, Renato AU - Toribio Jimenez, Jeyri PB - Universidad Nacional Abierta y a Distancia, UNAD AB - ER - @misc{10596_39484, author = {Aguirre-Noyola José Luis and Romero Ramírez Yaneth and Ruvalcaba Ledezma Jesus Carlos and Forero Forero Angela Victoria and León Rodríguez Renato and Toribio Jimenez Jeyri}, title = {Biosurfactants produced by metal-resistant Pseudomonas aeruginosa isolated from Zea mays rhizosphere and compost}, year = {}, abstract = {}, url = {} }RT Generic T1 Biosurfactants produced by metal-resistant Pseudomonas aeruginosa isolated from Zea mays rhizosphere and compost A1 Aguirre-Noyola, José Luis A1 Romero Ramírez, Yaneth A1 Ruvalcaba Ledezma, Jesus Carlos A1 Forero Forero, Angela Victoria A1 León Rodríguez, Renato A1 Toribio Jimenez, Jeyri PB Universidad Nacional Abierta y a Distancia, UNAD AB OL Spanish (121)
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    Abstract
    Contextualización: la Pseudomonas aeruginosa es capaz de producir biosurfactantes que tienen muchos usos en la biorremediación y producción de agentes antivirales, antibacterianos, antiparasitarios, esporicidas y antifúngicos, entre otros. Vacío de conocimiento: este estudio describe la producción de biosurfactantes mono y di-ramnolípidos por cepas de P. aeruginosa aisladas de la rizosfera y compostas de Zea mays en el estado de Guerrero, México. Propósito del estudio: los objetivos generales fueron investigar la producción de biosurfactantes, piocianina y tolerancia a metales pesados y la capacidad de actividad antimicrobiana de los biosurfactantes producidos por cepas de P. aeruginosa aisladas de rizosfera y composta en México. Metodología: Se determinó la producción de biosurfactantes con base en la hemolisis agar sangre, halos azules en agar CTAB-azul de metileno, ensayo de colapso de gotas, producción de espuma en medio PPGAS, índice de emulsión (IE24) y capacidad antibacterial, las cepas se identificaron por la secuencia del gen del 16S y también se evaluó la resistencia a metales pesados. Resultados y conclusiones: Dos cepas aisladas de la rizosfera de Zea mays (PAM8, PAM9) fueron las mejores productoras de biosurfactantes, y sus extractos mostraron actividad antimicrobiana frente a bacterias Grampositivas y Gramnegativas. PAM8 y PAM9 mostraron >30% de hidrofobicidad a hidrocarburos y fueron capaces de emulsionar tolueno, ciclohexano, petróleo, diésel y aceites. Todas las cepas mostraron el mismo perfil de tolerancia a metales pesados (As5+ > As3+ > Zn2+ > Pb2+ > Fe3+ > Cd2+ > Cu2+ > Cr6+ en concentraciones de 20, 10, 10, 6, 4, 4, 2 y 2 mM., respectivamente). El aislamiento de bacterias productoras de biosurfactantes y tolerantes a metales ...
     
    Contextualization: Pseudomonas aeruginosa is capable of producing biosurfactants which have many uses in bioremediation and the production of antiviral, antibacterial, antiparasitic, sporicidal and antifungal agents, among others.   Knowledge gap: This study describes the production of mono and di-rhamnolipid biosurfactants by P. aeruginosa strains isolated from Zea mays rhizosphere and composts in the state of Guerrero, Mexico.  Purpose: The overall aims were to investigate biosurfactant, pyocyanin production, and tolerance to heavy metals and antimicrobial activity capacity than biosurfactants produced from P. aeruginosa strains from corn rhizosphere and compost in Mexico. Methodology: Biosurfactant production was determined based hemolysis on blood agar, blue halos in CTAB-Methylene blue agar, drop collapse test and production of foam on PPGAS broth, the emulsion index (IE24) and antibacterial capacity. The strains were identified by sequence of the 16S rDNA gene and their resistance to heavy metals were also evaluated. Results and conclusions: Two strains isolated from Zea mays rhizosphere (PAM8, PAM9) were the best biosurfactant producers and their extracts showed antimicrobial activity against Grampositive and Gramnegative bacteria. PAM8 and PAM9 showed >30% of cellular hydrophobicity to hydrocarbons, and were capable of emulsifying toluene, cyclohexane, petroleum, diesel and oils. All strains showed the same profile of heavy metal tolerance (As5+ >As3+ >Zn2+ >Pb2+ >Fe3+ >Cd2+ >Cu2+ >Cr6+ in concentrations of 20, 10, 10, 6, 4, 4, 2 and 2 mM., respectively). The isolation of biosurfactant-producing and heavy-metal tolerant bacteria from Zea mays rhizosphere and compost in Guerrero demonstrates the capacity for this region to harbor potentially important microbial strains for industrial or bioremediation applications.
     
     
    College
    https://hemeroteca.unad.edu.co/index.php/riaa/article/view/3849/4338
    https://hemeroteca.unad.edu.co/index.php/riaa/article/view/3849/4729
    https://hemeroteca.unad.edu.co/index.php/riaa/article/view/3849/4285
    https://hemeroteca.unad.edu.co/index.php/riaa/article/view/3849/4378
    https://hemeroteca.unad.edu.co/index.php/riaa/article/view/3849/4730
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    info:eu-repo/semantics/article
    info:eu-repo/semantics/publishedVersion
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    https://hemeroteca.unad.edu.co/index.php/riaa/article/view/3849
    http://dx.doi.org/10.22490/21456453.3849
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