SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Acúmulo de ácido chiquímico em plantas de Brachiaria decumbens pulverizadas com sub-doses de Glyphosate.

MATALLO, M. B.; FRANCO, D. A. S.; ALMEIDA, S. D. B.; MOURA, M. A.; CERDEIRA, A. L.; QUEIROZ, S. C. do N. de; MORAES, R. de O.; DUKE, S. O.; SILVA, D. F. P. da.

O ácido chiquímico é um indicador da intoxicação das plantas por glifosate. Apesar de inativado no solo, há indícios de que esse herbicida pode ser liberado pelas raízes das plantas tratadas sendo, posteriormente, absorvido por outras plantas. O objetivo desse trabalho foi verificar a exsudação do glifosate a partir de plantas de soja RR e sua posterior absorção por soja convencional, ambas cultivadas em sistema hidropônico. Os resultados mostraram que houve exsudação do glifosate e de seu metabolito ácido aminometilfosfônico (AMPA) pela soja RR na solução nutritiva e posterior absorção do herbicida, indicada pelo acúmulo do ácido chiquímico nas plantas de soja convencional. Comprova-se a exsudação e posterior absorção do glifosate, entretanto, relacionar...

Tipo: Artigo em anais de congresso (ALICE)

Palavras-chave: Ácido chiquímico; Rizosfera.

Ano: 2009

URL: http://www.alice.cnptia.embrapa.br/handle/doc/577647

MATALLO, M. B.; ALMEIDA, S. D. B.; GARCIA BLANCO, F. M.; FRANCO, D. A. S.; MENEZES, P. T. C.; LUCHINI, L. C.; CERDEIRA, A. L.; SPADOTTO, C. A.; DUKE, S. O..

2006

Aplotaxene, a possible allelochemical of thistle (Carduus sp).

Palavras-chave: Glifosato; Ácido chiquímico; Brachiaria decumbens.

Ano: 2006

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1027827

CERDEIRA, A. L.; SILVA, F. M. L.; DONEGA, M. A.; CORNIANI, N.; VELINI, E. D.; CANTRELL, C. L.; DAYAN, F. E.; COELHO, M. N.; SHEA, K.; DUKE, S. O..

2014

Aplotaxene, an allelochemical from roots of the invasive species carduus nutans and C. acanthoides.

Palavras-chave: Aplotaxene; Aleloquímicos; Carduus.

Ano: 2014

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1004764

CERDEIRA, A. L.; SILVA, F. M. L.; DONEGÁ, M. A.; CANTRELL, C. L.; SHEA, K.; DUKE, S. O.; CORNIANI, N..

2013

Avaliação do uso de Glyphosate em soja geneticamente modificada e sua relação com o ácido chiquímico.

Palavras-chave: Alelopatia; Erva daninha; Fitotoxidade; Carduus nutans; Arduus acanthoides; Allelochemicals.

Ano: 2013

URL: http://www.alice.cnptia.embrapa.br/handle/doc/981678

FRANCO, D. A. S.; ALMEIDA, S. D. B.; CERDEIRA, A. L.; DUKE, S. O.; MORAES, R. M.; LACERDA, A. L. S.; MATALLO, M. B..

Resumo: Com o aumento da comercialização de culturas geneticamente modificadas (GM) resistentes ao glyphosate, é importante investigar a relação entre o uso desse herbicida e seus efeitos no crescimento e desenvolvimento de plantas de soja GM, assim como sua relação com o ácido chiquímico. Nesse sentido, foi conduzido um ensaio de campo e outro em casa de vegetação, com o objetivo de verificar a influência do glyphosate no crescimento, no desenvolvimento e na qualidade dos grãos da soja GM, bem como sua exsudação radicular e posterior absorção por plântulas de soja convencional cultivada sob condições hidropônicas. O ensaio de campo foi realizado em Eng. Coelho-SP, em 2007/08, sob delineamento de blocos ao acaso com quatro repetições, com aplicações...

Bioassay-directed isolation and identification of phytotoxic terpenoids from horseweed (Conyza Canadensis).

Palavras-chave: Chiquimato; Transgenia; Exsudação radicular; AMPA; Hidroponia; Glifosato; Planta transgênica; Soja; Herbicida; Exsudação; Transgenic plants; Soybeans; Glyphosate; Exudation.

Ano: 2012

URL: http://www.alice.cnptia.embrapa.br/handle/doc/936566

QUEIROZ, S. C. do N. de; CANTRELL, C. L.; DUKE, S. O.; MORAES, R. M.; CERDEIRA, A. L.; NANDULA, V..

Horseweed [Conyza canadensis (L.) Cronquist, syn. Erigeron canadensis L.], Asteraceae, is a common weed with known allelopathic effects but few studies on the isolation and identification of the phytotoxic compounds have been reported [1]. C. canadensis infests orchards, vineyards, field crops such as corn, soybean and cotton, particularly in herbicide-resistant crops where conservation tillage or no-till systems are used. The objective of this study was to identify the phytotoxic compounds present by systematically performing bioassay-directed isolation and subsequent identification of the bioactive constituents according to Dayan et al. [2]. No significant phytotoxic activity against Lactuca sativa or Agrostis stolonifera was detected in methanol, or...

Effects of glyphosate-resistant crop cultivation on soil and water quality

Palavras-chave: Conyza Canadensis; Phytotoxic terpenoids; Horseweed.

Ano: 2012

URL: http://www.alice.cnptia.embrapa.br/handle/doc/956433

CERDEIRA, A. L.; DUKE, S. O..

Transgenic glyphosate-resistant crops (GRCs) have been com- mercialized and grown extensively in the western Hemisphere and, to a lesser extent, elsewhere. GRCs have generally become dominant in those countries where they have been approved for growing. Potential effects of glyphosate on soil and water are minimal, compared to the effects of the herbicides that are re- placed when GRCs are adopted. Perhaps the most important indirect effect is that GRCs crops promote the adoption of re- duced- or no-tillage agriculture, resulting in a signifcant reduc- tion in soil erosion and water contamination. Glyphosate and its degradation product, aminomethylphosphonate (AMPA), residues are not usually detected in high levels in ground or surface water in areas where...

Effects of glyphosate-resistant crops on water quality.

Palavras-chave: Resistência a herbicida; Herbicide-resistant crops; Glyphosate; Soil; Water; Environment.

Ano: 2010

URL: http://www.alice.cnptia.embrapa.br/handle/doc/872430

CERDEIRA, A. L.; DUKE, S. O..

2009

Environmental impacts of transgenic glyphosate-resistant soybean cultivation in Brazil.

Palavras-chave: Herbicida; Qualidade da água.

Ano: 2009

URL: http://www.alice.cnptia.embrapa.br/handle/doc/579878

CERDEIRA, A. L.; GAZZIERO, D. L. P.; DUKE, S. O..

Glyphosate-resistant soybeans (GRS) effects on contamination of soil, water, and air are minimal, compared to those caused by the herbicides that they replace when GRS are adopted. Transgenes encoding glyphosate resistance in soybeans are highly unlikely to be a risk to wild plant species in Brazil. GRS resulted in a significant shift to no-tillage practices, but weed resistance may reduce this trend. Probably the highest agricultural risk in adopting GRS in Brazil is related to weed resistance due to use of glyphosate. Weed species in GRS fields have shifted in Brazil to those that can more successfully withstand glyphosate or to those that avoid the time of its application. These include Chamaesyce hirta, Commelina benghalensis, Digitaria insularis,...

Glyphosate applied at low doses can stimulate plant growth.

Palavras-chave: Planta transgênica; Impacto ambiental; Soja; Soybeans; Environmental impact; Transgenic plants.

Ano: 2010

URL: http://www.alice.cnptia.embrapa.br/handle/doc/879611

VELINI, E.; ALVES, E.; GODOY, M. C.; MESCHEDE, D. K.; SOUZA, R. T. de; DUKE, S. O..

BACKGROUND:Glyphosate blocks the shikimic acid pathway, inhibiting the production of aromatic amino acids and several secondary compounds derived from these amino acids. Non-target plants can be exposed to low doses of glyphosate by herbicide drift of spray droplets and contact with treated weeds. Previous studies have reported that low doses of glyphosate stimulate growth, although these data are very limited. The objective of this study was to determine the effects of low glyphosate doses on growth of a range of plant species. RESULTS:Growth of maize, conventional soybean, Eucalyptus grandis Hill ex Maiden, Pinus caribea L. and Commelia benghalensis L. was enhanced by 1.8-36 g glyphosate ha-1. Growth of glyphosate-resistant soybean was unaffected by any...

Herbicide effects on plant disease.

Palavras-chave: Glifosato; Crescimento vegetativo; Agricultura; Agrotóxico; Eucalipto; Herbicida; Milho; Soja; Pinus.

Ano: 2008

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/543207

Microwave-assisted solvent extraction and analysis of shikimic acid from plant tissues.

DUKE, S. O.; CERDEIRA, A. L.; MATALLO, M. B..

To be effective, herbicides they must have strong biological activity against plants. Indirectly through their effects on plants, herbicides can influence almost any process or interaction of the plant, including its susceptibility to plant diseases. In some cases, herbicides also have direct effects on plant pathogens. In this short review, we will discuss both types of effect, and, where possible, provide the mechanism for the effect. We provide a separate section for glyphosate because of the relatively large amount of information on the effects of this very important herbicide on plant diseases and the fact that there have been many seemingly conflicting claims of the effect of glyphosate on diseases in glyphosate-resistant crops (Duke & Cerdeira,...

Tipo: Artigo em anais de congresso (ALICE)

Palavras-chave: Herbicida; Doença de planta.

Ano: 2006

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1026544

MATALLO, M. B.; ALMEIDA, S. D. B.; CERDEIRA, A. L.; FRANCO, D. A. S.; BLANCO, F. M. G.; MENEZES, P. T. C.; LUCHINI, L. C.; MOURA, M. A.; DUKE, S. O..

A better method for determination of shikimate in plant tissues is needed to monitor exposure of plants to the herbicide glyphosate [N-(phosphonomethyl)glycine] and to screen the plant kingdom for high levels of this valuable phytochemical precursor to the pharmaceutical oseltamivir. A simple, rapid, and efficient method using microwave-assisted extraction (MWAE) with water as the extraction solvent was developed for the determination of shikimic acid in plant tissues. High performance liquid chromatography was used for the separation of shikimic acid, and chromatographic data were acquired using photodiode array detection. This MWAE technique was successful in recovering shikimic acid from a series of fortified plant tissues at more than 90% efficiency...

Monitoramento do ácido chiquímico no manejo de plantas daninhas com glifosato em pomar comercial de citros.

Palavras-chave: Glifosato.

Ano: 2009

URL: http://www.alice.cnptia.embrapa.br/handle/doc/697142

MATALLO, M. B.; ALMEIDA, S. D. B.; CERDEIRA, A. L.; FRANCO, D. A. S.; LUCHINI, L. C.; MOURA, M. A. M.; DUKE, S. O..

Com o objetivo de verificar o acúmulo de ácido chiquímico em plantas de laranja pêra (Citrus sinensis) num pomar comercial manejado com glifosato, um herbicida sistêmico de amplo espectro, foram coletadas amostras na Fazenda Jequitibá, tradicional no cultivo de citros, situada no Município de Santo Antônio de Posse, SP. O produtor aplicou de forma convencional Roundup® Original a 1.440 g.ha-1 de equivalente ácido (e.a.) do sal de isopropilamino de glifosato em 19/12/2006 na entrelinha de 15 plantas, deixando outras cinco como testemunha. A reaplicação de glifosato a 1.260 g.ha-1 de e.a. foi realizada em 2/4/2007. Em ambos os casos, imediatamente antes da aplicação e aos 3, 7, 10, 15, 20 e 35 dias após, foram coletadas 20 folhas de cada planta tanto da área...

Phytotoxic Activity of Imperata cylindrica (L.) P. Beauv. Extracts.

Palavras-chave: Herbicidas; Chiquimato; CLAE; Herbicida; Laranja pera; Cromatografia; Herbicides; Oranges; High performance liquid chromatography.

Ano: 2011

URL: http://www.alice.cnptia.embrapa.br/handle/doc/901527

CERDEIRA, A. L.; CANTRELL, C. L.; BYRD, J. D.; DUKE, S. O..

2011

Plantas transgênicas resistentes a herbicidas e interações com o meio ambiente.

Palavras-chave: Imperata cylindrica (L.) P. Beauv.; Phytotoxicity; Imperata cylindrica.

Ano: 2011

URL: http://www.alice.cnptia.embrapa.br/handle/doc/917788

Potential allelochemicals of the invasive species Carduus nutans L. and C. acanthoides.

CERDEIRA, A. L.; DUKE, S. O.; GAZZIERO, D. L. P.; MATALLO, M. B.; BOLONHEZI, D..

2009

Tipo: Capítulo em livro científico (ALICE)

Palavras-chave: Planta transgência; Resistência a pesticida; Transgenic plants; Herbicide resistance.

Ano: 2009

URL: http://www.alice.cnptia.embrapa.br/handle/doc/697023

DUKE, S. O.; CERDEIRA, A. L.; CANTRELL, C. L.; SILVA, F. M.; CORNIANI, N.; VELINI, E. D.; DONEGA, M. A..

The thistles Carduus nutants L. and C. acanthoides L. have both been implicated as allelopathic species. These Eurasian native plants are invasive in the U.S. and other parts of the world, competing well with many native species. Bioassay-guided isolation of phytotoxins from shoots and roots of this plant revealed that a chemical found in the roots, aplotaxene (heptadeca-1,8,11,14-tetrane), to be the most likely candidate as an allelochemical. Contrary to the published work of others, we found that this compound to be moderately phytotoxic. It was also found in relatively large amounts in the roots of both Carduus species, and we found the compound to be exuded by the roots into the soil.

Potential environmental impacts of herbicide-resistant crops.

Palavras-chave: Alelopatia; Erva daninha; Fitotoxidade; Carduus nutans; Carduus acanthoides; Allelochemicals.

Ano: 2013

URL: http://www.alice.cnptia.embrapa.br/handle/doc/981690

Transgenic hebicide-resistant crops: current status and potential for the future.

DUKE, S. O.; CERDEIRA, A. L..

Transgenic bromoxynil-, glufosinate-, and glyphosate-resistant crops have been commercialized and grown extensively in the Western Hemisphere and, to a lesser extent, elsewhere. Bromoxynil-resistant crops have been removed from the market. Few new herbicide-resistant crops (HRCs) are likely to be introduced in the near future. Glyphosate-resistant cotton and soybean have become dominant in those countries where they can be grown. Previous and potential effects of glufosinate and glyphosate on contamination of soil, water, and air are minimal, compared to that caused by the herbicides that they replace when HRCs are adopted. No risks have been found with food or feed safety or nutritional value in products from currently available HRCs. Both glufosinate-...

Tipo: Capítulo em livro científico (ALICE)

Palavras-chave: Impacto ambiental; Herbicida.

Ano: 2005

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1024725

DUKE, S. O.; CERDEIRA, A. L..

The term ?herbicide-resistant crop? (HRC) describes crops made resistant to herbicides by either transgene technology or by selection in cell or tissue culture for mutations that confer herbicide resistance. HRCs are also referred to as herbicide-tolerant crops. Most of the success and controversy about HRCs concerns transgenic HRCs, so this article will focus on these products. Transgenic HRCs are the predominant transgenic crops, and the number of hectares planted in these crops has increased dramatically worldwide since they were introduced in 1994, reaching almost 60 million hectares in 2004 (ISAAA, 2005).