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Evaluating Aspergillus terreus tolerance to toxic metals
Introduction: Metal pollution is one of the major environmental problems. Some metals are toxic at very low concentrations, bioaccumulate and do not decompose to non-toxic forms.Objective: To isolate a strain of microscopic fungus in a site contaminated with toxic metals and to eva...
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Formato: | Online Artículo |
Lenguaje: | spa |
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Universidad Autónoma Chapingo
2021
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Acceso en línea: | https://revistas.chapingo.mx/forestales/article/view/r.rchscfa.2020.07.047 https://dx.doi.org/10.5154/r.rchscfa.2020.07.047 |
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author | Villalba-Villalba, Ana G. |
author_facet | Villalba-Villalba, Ana G. |
author_sort | Villalba-Villalba, Ana G. |
collection | Revista Chapingo Serie Ciencias Forestales y del Ambiente |
description | Introduction: Metal pollution is one of the major environmental problems. Some metals are toxic at very low concentrations, bioaccumulate and do not decompose to non-toxic forms.Objective: To isolate a strain of microscopic fungus in a site contaminated with toxic metals and to evaluate the tolerance to these substances.Materials and methods: Fungi were isolated from the soil of an abandoned lead mine. Tolerance index of fungi to cadmium, mercury and lead was evaluated individually at concentrations of 50, 100, 250, 350 and 500 ppm; in addition, a multimetal system (mixture) with cadmium, chromium, mercury and lead was evaluated at 4, 8, 16, 64, 80, 120, 200 and 400 ppm. The minimum inhibitory concentration (MIC) was also determined.Results and discussion: The isolated fungi were identified as Aspergillus terreus, which showed high tolerance indices for lead (0.9) at all concentrations tested and indices of 0.8 at most mercury concentrations. Cadmium was the most toxic metal; tolerance indices of 0.56 and 0.2 were observed at 50 ppm and 100 ppm, respectively. High tolerance indices (0.9) were observed in the multimetal system up to 64 ppm. MIC was greater than 500 ppm with lead and mercury, less than 250 ppm with cadmium and greater than 400 ppm with the multimetal system.Conclusion: A. terreus showed high tolerance to lead at all concentrations tested. The level of tolerance is influenced by the type of metal. |
format | Online Article |
id | oai_chapingo-forestales-_article-227 |
institution | Universidad Autónoma Chapingo |
language | spa |
publishDate | 2021 |
publisher | Universidad Autónoma Chapingo |
record_format | ojs |
spelling | oai_chapingo-forestales-_article-2272023-08-28T16:31:51Z Evaluating Aspergillus terreus tolerance to toxic metals Evaluación de la tolerancia de Aspergillus terreus a metales tóxicos Villalba-Villalba, Ana G. contaminación ambiental plomo cadmio hongo filamentoso concentración mínima inhibitoria Se aisló el hongo Aspergillus terreus de suelo contaminado con metales tóxicos. A. terreus mostró alto índice de tolerancia al plomo (0.9) y mercurio (0.8). La concentración mínima inhibitoria con plomo y mercurio fue mayor de 500 ppm. El cadmio fue el más tóxico con índices de 0.56 y 0.2 a 50 ppm y 100 ppm, respectivamente. En el sistema multimetal (cadmio, cromo, mercurio y plomo), el índice fue alto (0.9) a 64 ppm. environmental pollution lead cadmium filamentous fungi minimum inhibitory concentration Aspergillus terreus was isolated from soil contaminated with toxic metals. A. terreus showed high tolerance index to lead (0.9) and mercury (0.8). Minimum inhibitory concentration with lead and mercury was greater than 500 ppm. Cadmium was the most toxic with indexes of 0.56 and 0.2 at 50 ppm and 100 ppm, respectively. The index was high (0.9) at 64 ppm for the multimetal system (cadmium, chromium, mercury and lead). Introduction: Metal pollution is one of the major environmental problems. Some metals are toxic at very low concentrations, bioaccumulate and do not decompose to non-toxic forms.Objective: To isolate a strain of microscopic fungus in a site contaminated with toxic metals and to evaluate the tolerance to these substances.Materials and methods: Fungi were isolated from the soil of an abandoned lead mine. Tolerance index of fungi to cadmium, mercury and lead was evaluated individually at concentrations of 50, 100, 250, 350 and 500 ppm; in addition, a multimetal system (mixture) with cadmium, chromium, mercury and lead was evaluated at 4, 8, 16, 64, 80, 120, 200 and 400 ppm. The minimum inhibitory concentration (MIC) was also determined.Results and discussion: The isolated fungi were identified as Aspergillus terreus, which showed high tolerance indices for lead (0.9) at all concentrations tested and indices of 0.8 at most mercury concentrations. Cadmium was the most toxic metal; tolerance indices of 0.56 and 0.2 were observed at 50 ppm and 100 ppm, respectively. High tolerance indices (0.9) were observed in the multimetal system up to 64 ppm. MIC was greater than 500 ppm with lead and mercury, less than 250 ppm with cadmium and greater than 400 ppm with the multimetal system.Conclusion: A. terreus showed high tolerance to lead at all concentrations tested. The level of tolerance is influenced by the type of metal. Introducción: La contaminación por metales es uno de los principales problemas ambientales. Algunos metales son tóxicos a concentraciones muy bajas, se bioacumulan y no se descomponen a formas no tóxicas.Objetivo: Aislar una cepa de hongo microscópico en un sitio contaminado con metales tóxicos y evaluar la tolerancia a dichas sustancias.Materiales y métodos: El hongo se aisló de suelo de una mina abandonada de extracción de plomo. El índice de tolerancia del hongo al cadmio, mercurio y plomo se evaluó de manera individual a concentraciones de 50, 100, 250, 350 y 500 ppm; además, se evaluó un sistema multimetal (mezcla) con cadmio, cromo, mercurio y plomo a 4, 8, 16, 64, 80, 120, 200 y 400 ppm. También se determinó la concentración mínima inhibitoria (CMI).Resultados y discusión: El hongo aislado se identificó como Aspergillus terreus, el cual mostró índices de tolerancia altos al plomo (0.9) en todas las concentraciones evaluadas e índices de 0.8 en la mayoría de las concentraciones de mercurio. El cadmio fue el metal más tóxico; se observaron índices de tolerancia de 0.56 y 0.2 a 50 ppm y 100 ppm, respectivamente. En el sistema multimetal se observaron índices de tolerancia altos (0.9) hasta los 64 ppm. La CMI fue mayor de 500 ppm con plomo y mercurio, menor de 250 ppm con el cadmio y mayor de 400 ppm con el sistema multimetal.Conclusión: A. terreus mostró alta tolerancia al plomo en todas las concentraciones evaluadas. El nivel de tolerancia se ve influenciado por el tipo de metal. Universidad Autónoma Chapingo 2021-08-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.chapingo.mx/forestales/article/view/r.rchscfa.2020.07.047 10.5154/r.rchscfa.2020.07.047 Revista Chapingo Serie Ciencias Forestales y del Ambiente; Vol. 27 No. 3 (2021): September-December; 449–464 Revista Chapingo Serie Ciencias Forestales y del Ambiente; Vol. 27 Núm. 3 (2021): septiembre-diciembre; 449–464 2007-4018 2007-3828 spa https://revistas.chapingo.mx/forestales/article/view/r.rchscfa.2020.07.047/r.rchscfa.2020.07.047 Derechos de autor 2021 Revista Chapingo Serie Ciencias Forestales y del Ambiente https://creativecommons.org/licenses/by-nc/4.0 |
spellingShingle | contaminación ambiental plomo cadmio hongo filamentoso concentración mínima inhibitoria Se aisló el hongo Aspergillus terreus de suelo contaminado con metales tóxicos. A. terreus mostró alto índice de tolerancia al plomo (0.9) y mercurio (0.8). La concentración mínima inhibitoria con plomo y mercurio fue mayor de 500 ppm. El cadmio fue el más tóxico con índices de 0.56 y 0.2 a 50 ppm y 100 ppm, respectivamente. En el sistema multimetal (cadmio, cromo, mercurio y plomo), el índice fue alto (0.9) a 64 ppm. environmental pollution lead cadmium filamentous fungi minimum inhibitory concentration Aspergillus terreus was isolated from soil contaminated with toxic metals. A. terreus showed high tolerance index to lead (0.9) and mercury (0.8). Minimum inhibitory concentration with lead and mercury was greater than 500 ppm. Cadmium was the most toxic with indexes of 0.56 and 0.2 at 50 ppm and 100 ppm, respectively. The index was high (0.9) at 64 ppm for the multimetal system (cadmium, chromium, mercury and lead). Villalba-Villalba, Ana G. Evaluating Aspergillus terreus tolerance to toxic metals |
title | Evaluating Aspergillus terreus tolerance to toxic metals |
title_alt | Evaluación de la tolerancia de Aspergillus terreus a metales tóxicos |
title_full | Evaluating Aspergillus terreus tolerance to toxic metals |
title_fullStr | Evaluating Aspergillus terreus tolerance to toxic metals |
title_full_unstemmed | Evaluating Aspergillus terreus tolerance to toxic metals |
title_short | Evaluating Aspergillus terreus tolerance to toxic metals |
title_sort | evaluating aspergillus terreus tolerance to toxic metals |
topic | contaminación ambiental plomo cadmio hongo filamentoso concentración mínima inhibitoria Se aisló el hongo Aspergillus terreus de suelo contaminado con metales tóxicos. A. terreus mostró alto índice de tolerancia al plomo (0.9) y mercurio (0.8). La concentración mínima inhibitoria con plomo y mercurio fue mayor de 500 ppm. El cadmio fue el más tóxico con índices de 0.56 y 0.2 a 50 ppm y 100 ppm, respectivamente. En el sistema multimetal (cadmio, cromo, mercurio y plomo), el índice fue alto (0.9) a 64 ppm. environmental pollution lead cadmium filamentous fungi minimum inhibitory concentration Aspergillus terreus was isolated from soil contaminated with toxic metals. A. terreus showed high tolerance index to lead (0.9) and mercury (0.8). Minimum inhibitory concentration with lead and mercury was greater than 500 ppm. Cadmium was the most toxic with indexes of 0.56 and 0.2 at 50 ppm and 100 ppm, respectively. The index was high (0.9) at 64 ppm for the multimetal system (cadmium, chromium, mercury and lead). |
topic_facet | contaminación ambiental plomo cadmio hongo filamentoso concentración mínima inhibitoria Se aisló el hongo Aspergillus terreus de suelo contaminado con metales tóxicos. A. terreus mostró alto índice de tolerancia al plomo (0.9) y mercurio (0.8). La concentración mínima inhibitoria con plomo y mercurio fue mayor de 500 ppm. El cadmio fue el más tóxico con índices de 0.56 y 0.2 a 50 ppm y 100 ppm, respectivamente. En el sistema multimetal (cadmio, cromo, mercurio y plomo), el índice fue alto (0.9) a 64 ppm. environmental pollution lead cadmium filamentous fungi minimum inhibitory concentration Aspergillus terreus was isolated from soil contaminated with toxic metals. A. terreus showed high tolerance index to lead (0.9) and mercury (0.8). Minimum inhibitory concentration with lead and mercury was greater than 500 ppm. Cadmium was the most toxic with indexes of 0.56 and 0.2 at 50 ppm and 100 ppm, respectively. The index was high (0.9) at 64 ppm for the multimetal system (cadmium, chromium, mercury and lead). |
url | https://revistas.chapingo.mx/forestales/article/view/r.rchscfa.2020.07.047 https://dx.doi.org/10.5154/r.rchscfa.2020.07.047 |
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