The response of forest soil microflora to the herbicide formulations Fusilade and Roundup

Gorlach‐Lira, Krystyna; Stefaniak, O.; Ślizak, W.; Owedyk, Iwona

doi:10.1016/s0944-5013(97)80047-x

Cited by 16 publications

(9 citation statements)

References 12 publications

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“…Researchers have reported that, depending on the soil environment, glyphosate may cause only short-term inhibition of growth 19 or even stimulate the growth of soil bacteria. 21,25 In the present study, glyphosate enhanced fermentation initially but was inhibitory during the later stages of incubation. It is not known whether this response was a reflection of glyphosate altering the development of microbial populations during the early stages of incubation or due to its direct effect on the metabolism of the feed.…”

Section: Methodssupporting

confidence: 44%

The effect of glyphosate on digestion and horizontal gene transfer during in vitro ruminal fermentation of genetically modified canola

et al. 2007

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Section: Methodssupporting

confidence: 44%

The effect of glyphosate on digestion and horizontal gene transfer during in vitro ruminal fermentation of genetically modified canola

et al. 2007

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“…They are typically associated with several sources of variation such as natural variability (e.g., soil heterogeneity, weather conditions) and impacts of agricultural practices (e.g., soil tillage, crop rotation, irrigation measures, pesticide and fertiliser applications), and are thus not necessarily an indication of environmental harm (Kowalchuk et al, 2003). The magnitude and direction of responses of the soil microbial community to glyphosate application depend on the microorganisms investigated, herbicide dose, the soil type, and the ecological interactions, including whether the studies are conducted under laboratory or field conditions Parkinson, 1990, 1992;Gorlach-Lira et al, 1997;Busse et al, 2001;Motavalli et al, 2004;Powell and Swanton, 2008;Savin et al, 2009). Transient shifts in soil microbial communities and their structural diversity may occur after the application of glyphosate, but to the knowledge of the EFSA GMO Panel, a persistent effect of glyphosate on soil microbial communities has not been reported.…”

Section: Comparative Assessment Of Environmental Impacts Of Differentmentioning

confidence: 99%

Scientific Opinion on an application (EFSA‐GMO‐NL‐2005‐24) for the placing on the market of the herbicide tolerant genetically modified soybean 40‐3‐2 for cultivation under Regulation (EC) No 1829/2003 from Monsanto

2012

EFS2

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This Scientific Opinion reports on an evaluation of a risk assessment for the placing on the market for cultivation of genetically modified soybean 40‐3‐2, and updates the previous EFSA GMO Panel Scientific Opinion on the renewal applications for the continued marketing of soybean 40‐3‐2. The EFSA GMO Panel considered that soybean 40‐3‐2 is unlikely to raise additional environmental safety concerns compared with conventional soybean, but that the management of its cultivation could result in environmental harm under certain conditions. The Panel therefore recommended managing the use of glyphosate on soybean 40‐3‐2 in ways that result in similar or reduced environmental impacts compared with conventional soybean cultivation. There is no evidence of adverse effects on non‐target organisms (including pollinators) due to the expression of the CP4 EPSPS protein, and there are no indications of the occurrence of adverse effects on non‐target predators, herbivores and decomposers due to potential unintended changes in soybean 40‐3‐2. Owing to the lack of event‐specific data on plant‐pollinator interactions, scientific uncertainty on the occurrence of adverse effects on pollinators, due to potential unintended changes in soybean 40‐3‐2, remains, and strategies for resolving this uncertainty are discussed. The Panel recommended the deployment of case‐specific monitoring to address: (1) changes in weed community diversity; and (2) the evolution of resistance to glyphosate in weeds due to changes in herbicide and cutivation regimes. The Panel agreed with the general surveillance plan of the applicant, but requested that the Panel's proposals to strengthen general surveillance are implemented. The Panel concluded that the information available for soybean 40‐3‐2 addresses the scientific comments raised by Member States and that soybean 40‐3‐2, as described in this application, is as safe as its conventional counterpart and commercial non‐GM soybean varieties with respect to potential adverse effects on human and animal health. If subjected to appropriate management measures, the cultivation of soybean 40‐3‐2 is unlikely to have environmental effects any more adverse than those associated with conventional soybean cultivation.

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“…Com raras exceções, esses estudos não revelaram efeito adverso prolongado deste herbicida no solo (Wardle & Parkinson, 1990. Há relatos de efeitos inibitórios sobre microrganismos em meio de cultura (Quinn et al, 1988;Gorlach-Lira et al, 1997), havendo também casos de estímulo ao crescimento microbiano heterotrófico (Roslycky, 1982). Para bactérias fixadoras de nitrogênio em vida livre, os efeitos do glifosato variam muito em função das espécies estudadas (Haahtela et al, 1988;Santos & Flores, 1995).…”

Section: Introductionunclassified

Efeitos do glifosato sobre microrganismos simbiotróficos de soja, em meio de cultura e casa de vegetação

Malty

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Moreira

2006

Pesq. agropec. bras.

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Resumo -Os efeitos do herbicida Roundup, formulado à base de glifosato, foram avaliados sobre três estirpes de Bradyrhizobium elkanii (BR 29, INPA 80A e INPA 553A), e uma de B. japonicum (BR 86), e sobre três espécies de fungos micorrízicos arbusculares (FMA) (Gigaspora margarita, Glomus etunicatum e Scutellospora heterogama), em meios de cultivo com concentrações crescentes do herbicida (0 a 454 µmol L -1 ); foram também avaliados os efeitos sobre a nodulação e micorrização da soja, em casa de vegetação, em solo que recebeu, antes da semeadura, doses do herbicida equivalentes a 1,25 até 10 L ha -1. O Roundup mostrou-se inibitório ao crescimento de Bradyrhizobium spp. e aos fungos em meio de cultura, e esse efeito foi crescente com o aumento das concentrações aplicadas, tendo variado em razão das espécies ou estirpes avaliadas. No entanto, a inibição in vitro só ocorreu em concentrações muito superiores à dose recomendada para aplicações no campo. As estirpes BR 29, INPA 553A e INPA 80A mostraram-se mais tolerantes ao glifosato, em relação à estirpe BR 86. O efeito do herbicida sobre a germinação e o crescimento dos tubos germinativos dos esporos dos FMA foi diferenciado, tendo sido observada inibição decrescente de G. etunicatum para S. heterogama e G. margarita. A aplicação do herbicida ao solo, antes da semeadura, até a dose equivalente a 10 L ha -1 não influenciou na nodulação e na colonização micorrízica da soja.Termos para indexação: simbiose, fungos micorrízicos, Bradyrhizobium, nodulação. Effects of glyphosate on soybean symbiotic microorganisms, in culture media and in greenhouseAbstract -The effects of the Roundup herbicide on three strains of Bradyrhizobium elkanii (BR 29, INPA 80A and INPA 553A), one of B. japonicum (BR 86), and on three species of arbuscular mycorrhizal fungi (AMF) (Gigaspora margarita, Glomus etunicatum and Scutellospora heterogama), were evaluated in culture media containing increasing concentrations of the herbicide (0-454 µM); evaluations were also made on the effects on nodulation and mycorrhiza colonization of soybean grown in a soil treated with Roundup doses equivalent to 1.25 to 10 L ha -1 before sowing. The herbicide inhibited growth of Bradyrhizobium spp. and AMF in culture medium. These effects were directly related to increasing concentrations, and varied depending on the strain and species evaluated. However, in vitro inhibition occurred only when concentrations were greater than that recommended for use in the field. Strains BR 29, INPA 553A and INPA 80A showed to be more resistant to glyphosate, when compared to BR 86. Herbicide inhibition on germination and growth of AMF spore germ tubes decreased from G. etunicatum to S. heterogama and G. margarita. Soil application of Roundup before sowing up to a dose equivalent to 10 L ha -1 had no effect on nodulation and mycorrhiza colonization of soybean.

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The response of forest soil microflora to the herbicide formulations Fusilade and Roundup

Cited by 16 publications

References 12 publications

The effect of glyphosate on digestion and horizontal gene transfer during in vitro ruminal fermentation of genetically modified canola

The effect of glyphosate on digestion and horizontal gene transfer during in vitro ruminal fermentation of genetically modified canola

Scientific Opinion on an application (EFSA‐GMO‐NL‐2005‐24) for the placing on the market of the herbicide tolerant genetically modified soybean 40‐3‐2 for cultivation under Regulation (EC) No 1829/2003 from Monsanto

Efeitos do glifosato sobre microrganismos simbiotróficos de soja, em meio de cultura e casa de vegetação

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