Efeito da toxicidade de Cr (VI) e Zn (II) no crescimento do fungo filamentoso Aspergillus niger isolado de efluente industrial

Vale, Maria do Socorro; Abreu, Katiany do Vale; Gouveia, Sandro Thomaz; Leitão, Renato Carrhá; Santaella, Sandra Tédde

doi:10.1590/s1413-41522011000300006

Cited by 15 publications

(8 citation statements)

References 41 publications

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“…The test was performed in triplicate. Growth was observed at 24, 48, 72, and 96 h. Inhibition of mycelial growth (PIC) was calculated by Equation: (%) PIC = RGC -RGT ∕ RGC × 100, where RGC = radial growth of control (cm) and RGT = radial growth of treatment (cm) (Vale et al, 2011).…”

Section: Activity Of Trichoderma Sspmentioning

confidence: 99%

Larvicidal effect of hydroethanolic extract from the leaves of Acmella oleracea L. R. K. Jansen in Aedes aegypti and Culex quinquefasciatus

Araújo

Ferreira

et al. 2018

South African Journal of Botany

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Edited by J Van Staden Mosquitoes, such as Aedes aegypti and Culex quinquefasciatus, are important vectors of diseases, such as dengue fever, chikungunya fever, Zika virus, and filariasis, and these diseases are public health problems. The present study was carried out to evaluate the larvicidal activity of the hydroethanolic extract from leaves of Acmella oleracea leaves against 3rd instar larvae of the Ae. aegypti dengue vector and the Cx. quinquefasciatus filariasis vector. The hydroethanolic extract caused significant mortality in Ae. aegypti and Cx. quinquefasciatus. After 24 h of exposure to the extract, it was possible to establish the LC 50 values for the extract: 11.41 ppm for Ae. aegypti and LC 50 32.40 ppm for Cx. quinquefasciatus. The hydroethanolic extract from leaves of A. oleracea showed very low ecotoxicity suggesting that it can be used without causing environmental damage. This is the first study that shows the use of hydroethanolic extract from leaves of A. oleracea as an alternative to synthetic larvicides to eliminate larvae of Ae. aegypti and Cx. quinquefasciatus in an easy, cheap and safe way.

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Section: Activity Of Trichoderma Sspmentioning

confidence: 99%

Larvicidal effect of hydroethanolic extract from the leaves of Acmella oleracea L. R. K. Jansen in Aedes aegypti and Culex quinquefasciatus

Araújo

Ferreira

et al. 2018

South African Journal of Botany

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“…Several compounds, including crude oil, naphthalene, phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)pyrene (Da Silva, Umbuzeiro, Pfenning, Canhos, & Esposito, 2003;Argumedo-Delira, Alarcon, Ferreira-Cerrato, Almaraz, & Peña Cabriales, 2012;Lee et al, 2014;Zafra, Absálon, Cuevas, & Cortes-Espinosa, 2014), triazine herbicides (Colla, Primaz, Lima, Bertolini, & Costa, 2008) and heavy metals (Vale, Abreu, Gouveia, Leitão, & Santaella, 2011), has been used in these types of tests. The literature reports that high growth rates and tolerance to certain levels of contaminants are considered desirable characteristics in microorganisms, as are indicators of an ability to degrade such xenobiotics as PAHs (Lamar, Larsen, & Kirk, 1990;Matsubara, Lynch, & De Leij, 2006).…”

Section: Introductionmentioning

confidence: 99%

<b>Tolerance to Polycyclic Aromatic Hydrocarbons (PAHs) by filamentous fungi isolated from contaminated sediment in the Amazon region

Souza

Barreto

Mota

et al. 2017

Acta Sci. Biol. Sci.

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ABSTRACT. Tolerance to Polycyclic Hydrocarbons Aromatic (PAHs) is considered an important characteristic when assessing the bioremediation potential of microorganisms. Given this, the objective of this research was to assay filamentous fungi from the Amazon region, isolated from sediments with differents levels of contamination by PAHs, for tolerance to phenanthrene and pyrene. To achieve this, fungal cultures plugs (5 mm), obtained after 7 days growth, were transferred to petri dishes containing 20% Sabouraud dextrose agar medium, after surface innoculation with phenanthrene and pyrene crystals, separately. Radial mycelial growth was evaluated after 10 days at five different concentration levels for each contaminant and control group, all in triplicate for each treatment. Fungal growth and growth inhibition rates were calculated. The average growth of the colonies in each treatment was compared with one-way ANOVA, followed by a Tukey Test (p < 0,05). All fungi showed tolerant to phenanthrene and pyrene. However, Hypoxylon sp. showed the lowest growth inhibition rate and average growth rates significantly different of the other six tested species. Hypoxylon sp. has been shown to be a promising genetic resource for use in new studies of PAHs degradation.Keywords: phenanthrene, pyrene, fungal growth inhibition, Amazon.Tolerância a Hidrocarbonetos Policíclicos Aromáticos (HPAs) por fungos filamentosos isolados de sedimentos contaminados da região Amazônica RESUMO. A tolerância a Hidrocarbonetos Policíclicos Aromática (HPAs) é considerada como uma característica importante na avaliação do potencial de micro-organismos para biorremediação. Diante disso, o objetivo desta pesquisa foi avaliar fungos filamentosos da região amazônica, isolados de sedimentos com diferentes níveis de contaminação por HPAs, quanto à tolerância ao fenantreno e pireno. Para tanto, discos das culturas fúngicas (5 mm), obtidas após 7 dias de crescimento, foram transferidas para placas de Petri contendo meio Agar Sabouraud Dextrose a 20%, após inoculação superficial com cristais de fenantreno e pireno, separadamente. O crescimento micelial radial foi avaliado após 10 dias em cinco concentrações diferentes para cada contaminante e grupo controle, ambos em triplicata para cada tratamento. As taxas de crescimento fúngico e de inibição de crescimento foram calculadas. O crescimento médio das colônias em cada tratamento foi comparado com ANOVA one way, seguido pelo teste de Tukey (p < 0,05). Todos os fungos mostraram tolerância ao fenantreno e ao pireno. No entanto, Hypoxylon sp. apresentou menor taxa de inibição de crescimento e taxas médias de crescimento significativamente diferentes das outras seis espécies testadas. Hypoxylon sp. tem se mostrado um recurso genético promissor para uso em novos estudos sobre degradação de HPAs.Palavras-chaves: fenantreno, pireno, inibição do crescimento fúngico, Amazônia.

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“…According to Vale et al (2011), an Aspergillus niger strain was able to develop in culture medium supplied with growing concentrations of Zn and Cr until 100 mg. L -1 . Authors found that ion Cr showed higher toxicity than ion Zn, inhibiting the capacity of the fungus to develop during the germinative phase.…”

Section: Resultsmentioning

confidence: 99%

Fungal community diversity of heavy metal contaminated soils revealed by metagenomics

et al. 2022

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The inappropriate disposal of toxic compounds generated by industrial activity has been impacting to the environment considerably. Microbial communities inhabiting contaminated sites may represent interesting ecological alternatives for the decontamination of environments. The present work aimed to investigate the fungal diversity inhabiting sediments from industrial waste containing heavy metals by using metagenomic approach. A total of twelve fungal orders were retrieved from datasets and, at phylum level, Ascomycota was the most abundant, followed by Basidiomycota, Chytridiomycota and Blastocladiomycota. Higher abundance of sequences was encountered within the less contaminated site, while the lower abundance was found in the sample with the higher contamination with lead. Gene sequences related to DNA repair and heavy metals biosorption processes were found in the four samples analyzed. The genera Aspergillus and Chaetomium, and Saccharomycetales order were highly present within all samples, showing their potential to be used for bioremediation studies. The present work demonstrated the importance of using the metagenomic approach to understand the dynamics of fungal communities and their behavior under heavy metal contamination, aiming the use in bioremediation processes of environments contaminated with heavy metals.to excessive heavy metals concentration from industrial e uent may be highly harmful for both animal and human health, and has been associated to the occurrence of carcinogenesis, respiratory cancer, mutagenesis and cardiovascular and gastrointestinal diseases (Ahmad 2005;Akhtar et al. 2013;Woldeamanuale 2017).Heavy metals are divided into essentials, including copper, nickel, zinc and iron which are necessary to perform the proper functions of all biological systems, and nonessential, such as lead, mercury and cadmium. However, in high concentrations, both categories may be toxic to microorganisms (Dopson et al. 2003;Rasool and Irum 2014;Woldeamanuale 2017).Microbial communities present in heavy metals contaminated environments have developed detoxi cation strategies such as bioaccumulation, in order to protect the microbial cell wall, in an attempt to survive in these adverse environments (Dopson et al. 2003;Fidalgo 2011;Qayyum et al. 2016). Interaction between heavy metals and microbial communities can be classi ed into different categories such as extracellular, exocellular and intracellular, in which microbial cells can mobilize, immobilize, transform, precipitate, accumulate, coordinate, exchange and absorb the metal, as well as forming

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Efeito da toxicidade de Cr (VI) e Zn (II) no crescimento do fungo filamentoso Aspergillus niger isolado de efluente industrial

Cited by 15 publications

References 41 publications

Larvicidal effect of hydroethanolic extract from the leaves of Acmella oleracea L. R. K. Jansen in Aedes aegypti and Culex quinquefasciatus

Larvicidal effect of hydroethanolic extract from the leaves of Acmella oleracea L. R. K. Jansen in Aedes aegypti and Culex quinquefasciatus

<b>Tolerance to Polycyclic Aromatic Hydrocarbons (PAHs) by filamentous fungi isolated from contaminated sediment in the Amazon region

Fungal community diversity of heavy metal contaminated soils revealed by metagenomics

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