ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI

ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI

The extreme weather conditions in the Antarctic have exerted selective pressures favoring differential features in bacteria to survive this untapped environment (i.e., antibiotic molecules). Notably, higher chances of antibiotic discovery from extremophiles have been proposed recently. Althoughnew organic and environmentally friendly sources for helping in the control of plant pathogenic fungi are necessary, the information about anti-phytopathogenic applications of extremophile microorganisms from untapped environments is limited. In this study, we determined the antifungal effect of actinobacterial strains isolated from Antarctic soils and sediments. Co-culture inhibition assays and Minimum Inhibitory Concentration (MIC) determination revealed that all Antarctic strains (x28) can inhibit the growth of at least one phytopathogenic fungi including Fusarium oxysporum,Rhizoctonia solani,Botrytissp. and Phytophthora infestans. Additionally, new novel antagonistic relationships are reported. Our work establishes a precedent on Antarctic actinobacteria strains with the capacity to produce antifungal compounds, and its potential for developing new fungicides or biocontrol agents solving current agriculture problems.

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Main Authors: Santos, Andrés, Núñez-Montero, Kattia, Lamilla, Claudio, Pavez, Mónica, Quezada-Solís, Damián, Barrientos, Leticia
Format: Digital revista
Language:eng
Published: Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Biología 2020
Online Access:https://revistas.unal.edu.co/index.php/actabiol/article/view/76405
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spelling oai:www.revistas.unal.edu.co:article-764052020-05-06T22:36:41Z ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI Evaluación de la actividad antifúngica de actinobacterias antárticas contra hongos fitopatógenos Santos, Andrés Núñez-Montero, Kattia Lamilla, Claudio Pavez, Mónica Quezada-Solís, Damián Barrientos, Leticia Antagonism Antarctic bacteria antifungal extremophile plant pathogen Antagonismo antifúngico bacteria antártica extremófilos patógeno de plantas The extreme weather conditions in the Antarctic have exerted selective pressures favoring differential features in bacteria to survive this untapped environment (i.e., antibiotic molecules). Notably, higher chances of antibiotic discovery from extremophiles have been proposed recently. Althoughnew organic and environmentally friendly sources for helping in the control of plant pathogenic fungi are necessary, the information about anti-phytopathogenic applications of extremophile microorganisms from untapped environments is limited. In this study, we determined the antifungal effect of actinobacterial strains isolated from Antarctic soils and sediments. Co-culture inhibition assays and Minimum Inhibitory Concentration (MIC) determination revealed that all Antarctic strains (x28) can inhibit the growth of at least one phytopathogenic fungi including Fusarium oxysporum,Rhizoctonia solani,Botrytissp. and Phytophthora infestans. Additionally, new novel antagonistic relationships are reported. Our work establishes a precedent on Antarctic actinobacteria strains with the capacity to produce antifungal compounds, and its potential for developing new fungicides or biocontrol agents solving current agriculture problems. Las condiciones climáticas extremas en la Antártica han ejercido presiones selectivas en las bacterias, de forma que éstas poseen características diferenciales (ej. moléculas antibióticas) que les permiten sobrevivir a este entorno poco explorado. Recientemente se ha propuesto que pueden existir mayores posibilidades para el descubrimiento de antibióticos a partir de extremófilos. A pesar de que son necesarias nuevas fuentes orgánicas y amigables con el medio ambiente para controlar los hongos patógenos en plantas, la información sobre las aplicaciones anti-fitopatogénicas de microorganismos extremófilos, de ambientes poco explorados, es limitada. En este estudio, se determinó el efecto antifúngico de actinobacterias aisladas de suelos y sedimentos antárticos. Mediante ensayos de inhibición en co-cultivo y determinación de la concentración mínima inhibitoria (CIM) se reveló que todas las cepas antárticas (x28) tienen la capacidad de inhibir el crecimiento de al menos un hongo fitopatógeno, incluyendo Fusarium oxysporum,Rhizoctonia solani,Botrytissp. y Phytophthora infestans. Adicionalmente, se reportan nuevas relaciones antagónicas. Nuestro trabajo establece un precedente sobre cepas de actinobacterias antárticas con capacidad para la producción de compuestos antifúngicos y su potencial para el desarrollo de nuevos fungicidas o agentes de control biológico con el fin de resolver problemas actuales de la agricultura. Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Biología 2020-05-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion "Artículo revisado por pares" application/pdf https://revistas.unal.edu.co/index.php/actabiol/article/view/76405 10.15446/abc.v25n2.76405 Acta Biológica Colombiana; Vol. 25 No. 2 (2020); 353 - 358 Acta Biológica Colombiana; Vol. 25 Núm. 2 (2020); 353 - 358 1900-1649 0120-548X eng https://revistas.unal.edu.co/index.php/actabiol/article/view/76405/pdf Derechos de autor 2019 Acta Biológica Colombiana https://creativecommons.org/licenses/by-nc-sa/4.0
institution UNAL
collection OJS
country Colombia
countrycode CO
component Revista
access En linea
databasecode rev-actabol
tag revista
region America del Sur
libraryname Sistema Nacional de Bibliotecas de la UNAL
language eng
format Digital
author Santos, Andrés
Núñez-Montero, Kattia
Lamilla, Claudio
Pavez, Mónica
Quezada-Solís, Damián
Barrientos, Leticia
spellingShingle Santos, Andrés
Núñez-Montero, Kattia
Lamilla, Claudio
Pavez, Mónica
Quezada-Solís, Damián
Barrientos, Leticia
ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI
author_facet Santos, Andrés
Núñez-Montero, Kattia
Lamilla, Claudio
Pavez, Mónica
Quezada-Solís, Damián
Barrientos, Leticia
author_sort Santos, Andrés
title ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI
title_short ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI
title_full ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI
title_fullStr ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI
title_full_unstemmed ANTIFUNGAL ACTIVITY SCREENING OF ANTARCTIC ACTINOBACTERIA AGAINST PHYTOPATHOGENIC FUNGI
title_sort antifungal activity screening of antarctic actinobacteria against phytopathogenic fungi
description The extreme weather conditions in the Antarctic have exerted selective pressures favoring differential features in bacteria to survive this untapped environment (i.e., antibiotic molecules). Notably, higher chances of antibiotic discovery from extremophiles have been proposed recently. Althoughnew organic and environmentally friendly sources for helping in the control of plant pathogenic fungi are necessary, the information about anti-phytopathogenic applications of extremophile microorganisms from untapped environments is limited. In this study, we determined the antifungal effect of actinobacterial strains isolated from Antarctic soils and sediments. Co-culture inhibition assays and Minimum Inhibitory Concentration (MIC) determination revealed that all Antarctic strains (x28) can inhibit the growth of at least one phytopathogenic fungi including Fusarium oxysporum,Rhizoctonia solani,Botrytissp. and Phytophthora infestans. Additionally, new novel antagonistic relationships are reported. Our work establishes a precedent on Antarctic actinobacteria strains with the capacity to produce antifungal compounds, and its potential for developing new fungicides or biocontrol agents solving current agriculture problems.
publisher Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Biología
publishDate 2020
url https://revistas.unal.edu.co/index.php/actabiol/article/view/76405
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