Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals

Backgrounds and aims: Environmental pollution can affect tree health and the biodiversity of microorganisms, among them fungi, existing in the bark. Fraxinus pennsylvanica is the most cultivated tree in Buenos Aires city. In this work were to screen the micromycetes present in green-ash wood and bar...

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Autores principales: Navarro, Liliana Evelin, Levin, Laura, Rosenfeldt, Sonia
Formato: Artículo revista
Lenguaje:Español
Publicado: Sociedad Argentina de Botánica 2022
Materias:
biomonitoreo
contaminación
fresno
micromicetes
biomonitoring
contamination
green-ash
micromycetes
Acceso en línea:https://revistas.unc.edu.ar/index.php/BSAB/article/view/36749
Aporte de:
Revistas de la UNC de Universidad Nacional de Córdoba
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record_format ojs
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-10
container_title_str Revistas de la UNC
language Español
format Artículo revista
topic biomonitoreo
contaminación
fresno
micromicetes
biomonitoring
contamination
green-ash
micromycetes
spellingShingle biomonitoreo
contaminación
fresno
micromicetes
biomonitoring
contamination
green-ash
micromycetes
Navarro, Liliana Evelin
Levin, Laura
Rosenfeldt, Sonia
Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals
topic_facet biomonitoreo
contaminación
fresno
micromicetes
biomonitoring
contamination
green-ash
micromycetes
author Navarro, Liliana Evelin
Levin, Laura
Rosenfeldt, Sonia
author_facet Navarro, Liliana Evelin
Levin, Laura
Rosenfeldt, Sonia
author_sort Navarro, Liliana Evelin
title Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals
title_short Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals
title_full Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals
title_fullStr Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals
title_full_unstemmed Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals
title_sort evaluation of micromycetes associated with green-ash bark in buenos aires (argentina): their ability to degrade wood and tolerance to heavy metals
description Backgrounds and aims: Environmental pollution can affect tree health and the biodiversity of microorganisms, among them fungi, existing in the bark. Fraxinus pennsylvanica is the most cultivated tree in Buenos Aires city. In this work were to screen the micromycetes present in green-ash wood and bark, to determine if the micromycetes most frequently associated with ash bark produce lignocellulolytic enzymes, to describe the anatomical changes they caused in wood and to evaluate their tolerance to Cu and Pb as indicators of environmental pollution. M&M: Barks and wood were collected along an urban-periurban gradient. The decay caused in vitro in green-ash wood by the most frequently isolated micromycetes was evaluated, anatomical characters were described. The production of lignocellulolytic enzymes by these fungi and their tolerance to Cu and Pb was assessed. Results: Diplodia sp., Fusicoccum sp. and Sordaria sp. were the most frequently found micromycetes in green-ash bark, whereas Alternaria sp., Diplodia sp. and Phialophora sp. were isolated from wood. None of them caused symptoms of soft rot. They colonized ash wood in vitro but neither important wood weight losses were detected (3-5% after 6 months) nor micro anatomical relevant changes. Cellulolytic activity was produced by all the assayed micromycetes. All of them were able to grow with the addition of 250 mg/Kg of Cu or 1000 mg/Kg of Pb. Conclusions: The micromycetes most frequently isolated did not affect tree health. Their tolerance to high concentrations of heavy metals suggests their potential as biomonitors of environmental pollution.
publisher Sociedad Argentina de Botánica
publishDate 2022
url https://revistas.unc.edu.ar/index.php/BSAB/article/view/36749
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spelling I10-R10-article-367492023-02-15T20:32:25Z Evaluation of micromycetes associated with green-ash bark in Buenos Aires (Argentina): their ability to degrade wood and tolerance to heavy metals Evaluación de los micromicetes asociados a la corteza de fresno en Buenos Aires (Argentina): su capacidad para degradar madera y tolerancia a metales pesados Navarro, Liliana Evelin Levin, Laura Rosenfeldt, Sonia biomonitoreo contaminación fresno micromicetes biomonitoring contamination green-ash micromycetes Backgrounds and aims: Environmental pollution can affect tree health and the biodiversity of microorganisms, among them fungi, existing in the bark. Fraxinus pennsylvanica is the most cultivated tree in Buenos Aires city. In this work were to screen the micromycetes present in green-ash wood and bark, to determine if the micromycetes most frequently associated with ash bark produce lignocellulolytic enzymes, to describe the anatomical changes they caused in wood and to evaluate their tolerance to Cu and Pb as indicators of environmental pollution. M&M: Barks and wood were collected along an urban-periurban gradient. The decay caused in vitro in green-ash wood by the most frequently isolated micromycetes was evaluated, anatomical characters were described. The production of lignocellulolytic enzymes by these fungi and their tolerance to Cu and Pb was assessed. Results: Diplodia sp., Fusicoccum sp. and Sordaria sp. were the most frequently found micromycetes in green-ash bark, whereas Alternaria sp., Diplodia sp. and Phialophora sp. were isolated from wood. None of them caused symptoms of soft rot. They colonized ash wood in vitro but neither important wood weight losses were detected (3-5% after 6 months) nor micro anatomical relevant changes. Cellulolytic activity was produced by all the assayed micromycetes. All of them were able to grow with the addition of 250 mg/Kg of Cu or 1000 mg/Kg of Pb. Conclusions: The micromycetes most frequently isolated did not affect tree health. Their tolerance to high concentrations of heavy metals suggests their potential as biomonitors of environmental pollution. Introducción y objetivos: La contaminación ambiental podría afectar el estado sanitario del arbolado y a la biodiversidad de microorganismos. Fraxinus pennsylvanica es uno de los árboles más frecuentes en la Ciudad de Buenos Aires.  Los objetivos del trabajo fueron: relevar los micromicetes presentes en la corteza y madera de fresno, determinar si los micromicetes hallados con mayor frecuencia en la corteza producen enzimas lignocelulolíticas, describir los principales cambios anatómicos generados en la madera, y evaluar su tolerancia a metales pesados (Cu y Pb). M&M: Se recolectaron trozos de corteza y madera en un gradiente urbano-periurbano en el AMBA. Se evaluó el deterioro causado in vitro en la madera por los micromicetes aislados con mayor frecuencia. Se determinó la pérdida de peso, se analizaron los cambios anatómicos. Se determinó la producción de enzimas lignocelulolíticas y tolerancia al Cu y Pb. Resultados: Diplodia sp., Fusicoccum sp. y Sordaria sp. fueron los micromicetes detectados con mayor frecuencia en corteza, mientras que Alternaria sp., Diplodia sp. y Phialophora sp. se aislaron de madera. Ninguno causó síntomas de pudrición blanda, ni pérdidas importantes en el peso seco de la madera (3-5% luego de 6 meses), ni cambios microanatómicos. Se detectó actividad celulolítica en todos los micromicetes evaluados. Todos fueron capaces de crecer en 250 mg/Kg de Cu o 1000 mg/Kg de Pb. Conclusiones: Los micromicetes presentes en la corteza no afectarían el estado sanitario del arbolado. Su tolerancia a altas concentraciones de metales pesados sugiere potencialidad como biomonitores de contaminación ambiental. Sociedad Argentina de Botánica 2022-08-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/BSAB/article/view/36749 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 57 No. 4 (2022): December Boletín de la Sociedad Argentina de Botánica; Vol. 57 Núm. 4 (2022): Diciembre Boletín de la Sociedad Argentina de Botánica; v. 57 n. 4 (2022): Diciembre 1851-2372 0373-580X 10.31055/1851.2372.v57.n4 spa https://revistas.unc.edu.ar/index.php/BSAB/article/view/36749/38597 https://revistas.unc.edu.ar/index.php/BSAB/article/view/36749/38598 Derechos de autor 2022 Liliana Evelin Navarro, Laura Levin, Sonia Rosenfeldt https://creativecommons.org/licenses/by-nc-nd/4.0

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