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首页> 外文期刊>Journal of environmental science and health >Isolation of culturable mycobiota from agricultural soils and determination of tolerance to glyphosate of nontoxigenic Aspergillus section Flavi strains
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Isolation of culturable mycobiota from agricultural soils and determination of tolerance to glyphosate of nontoxigenic Aspergillus section Flavi strains

机译：从农业土壤中分离出可培养的真菌菌群，并确定非产毒曲霉黄病毒菌株对草甘膦的耐受性

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摘要

Glyphosate-based herbicides are extensively used in Argentina's agricultural system to control undesirable weeds. This study was conducted to evaluate the culturable mycobiota [colony forming units (CFU) g~(-1) and frequency of fungal genera or species] from an agricultural field exposed to pesticides. In addition, we evaluated the" tolerance of A. oryzae and nontoxigenic A flavus strains to high concentrations (100 to 500 mM - 17,000 to 84,500 ppm) of a glyphosate commercial formulation. The analysis of the mycobiota showed that the frequency of the main fungal genera varied according to the analyzed sampling period. Aspergillus spp. or Aspergillus section Flavi strains were isolated from 20 to 100% of the soil samples. Sterilia spp. were also observed throughout the sampling (50 to 100%). Aspergillus section Flavi tolerance assays showed that all of the tested strains were able to develop at the highest glyphosate concentration tested regardless of the water availability conditions. In general, significant reductions in growth rates were observed with increasing concentrations of the herbicide. However, a complete inhibition of fungal growth was not observed with the concentrations assayed. This study contributes to the knowledge of culturable mycobiota from agricultural soils exposed to pesticides and provides evidence on the effective growth ability of A oryzae and nontoxigenic A flavus strains exposed to high glyphosate concentrations in vitro.
机译：基于草甘膦的除草剂广泛用于阿根廷的农业系统中，以控制不良杂草。本研究旨在评估暴露于农药的农田中可培养的真菌菌群[菌落形成单位（CFU）g〜（-1）和真菌属或种的发生频率]。此外，我们评估了米曲霉和非产毒黄曲霉菌株对高浓度草甘膦商业制剂（100至500 mM-17,000至84,500 ppm）的耐受性。分枝杆菌的分析表明，主要真菌的频率属根据所分析的采样周期而变化，从20％至100％的土壤样品中分离出了曲霉属或黄曲霉科的Flavi菌株，在整个采样过程中（50％至100％）也观察到了Sterilia spp.。结果表明，无论水的供应条件如何，所有被测菌株都能在最高的草甘膦浓度下生长，总的来说，随着除草剂浓度的增加，生长速率会显着降低，但对真菌的生长具有完全的抑制作用。这项研究有助于了解农业土壤博览会上可培养的真菌菌群将其用于杀虫剂并提供证据，证明在体外高浓度草甘膦条件下米曲霉和非产毒黄曲霉菌株的有效生长能力。

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    Cecilia S. Carranza; Carla L. Barberis; Stella M. Chiacchiera; Ana Maria Dalcero; Carina E. Magnoli;

  • 作者单位

    Microbiology and Immunology Department, Faculty of Exact, Physiochemical and Natural Science, National University of Rio Cuarto, Rio Cuarto, Cordoba, Argentina;

    Microbiology and Immunology Department, Faculty of Exact, Physiochemical and Natural Science, National University of Rio Cuarto, Rio Cuarto, Cordoba, Argentina;

    Chemistry Department, Faculty of Exact, Physiochemical and Natural Science, National University of Rio Cuarto, Rio Cuarto, Cordoba, Argentina;

    Microbiology and Immunology Department, Faculty of Exact, Physiochemical and Natural Science, National University of Rio Cuarto, Rio Cuarto, Cordoba, Argentina;

    Microbiology and Immunology Department, Faculty of Exact, Physiochemical and Natural Science, National University of Rio Cuarto, Rio Cuarto, Cordoba, Argentina,Departamento de Microbiologia e Inmunologia, Facultad de Ciencias Exactas, Fisico, Quimicas y Naturales, Universidad Nacional de Rio Cuarto, Ruta Nacional N° 36 Km 601, (5800) Rio Cuarto, Cordoba, Argentina;

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  • 正文语种 eng
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  • 关键词

    Culturable mycobiota; agricultural field; tolerance to glyphosate;

    机译：可培养的菌群;农业领域草甘膦耐受性;

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