Tolerance Glyphosate
Mostrando 13-24 de 25 artigos, teses e dissertações.
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13. Impacto do cultivo da soja resistente ao glyphosate sobre artrópodes e componentes de produção da cultura / Impact of soybean crops resistant to glyphosate on arthropods and components of plant yield
The global area planted with transgenic crops was 125 million hectares in 2008. Of this total, 53% was occupied by soybean modified for tolerance to glyphosate. The rapid acceptance of this technology is due to high efficiency, low cost and easy to implement. However, the abuse use of a broad spectrum herbicide can cause direct and indirect impacts. The dire
Publicado em: 2009
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14. Suscetibilidade dos genótipos diplóides e tetraplóides de azevém (Lolium multiflorum Lam.) ao herbicida glyphosate / Susceptibility of diploid and tetraploid genotypes of Italian ryegrass (Lolium multiflorum Lam.) to the herbicide glyphosate
Genótipos de azevém (Lolium multiflorum Lam.) diplóides e tetraplóides são cultivados como forrageira na produção animal, no entanto, quando sistemas de produção que envolve o plantio direto são estabelecidos após o cultivo da forrageira é comum a dessecação com o herbicida glyphosate. Portanto, é importante conhecer se existe suscetibilidade
Publicado em: 2009
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15. Germinação, competitividade com a cultura da soja e resposta biológica a aplicações de glyphosate para plantas de trapoeraba (Commelina benghalensis L.) / Germination, competitiveness with the soybean crop and biologic response to glyphosate applications of Bengal dayflower plants (Commelina benghalensis L.)
In areas where the herbicide glyphosate is used frequently, populations of the weed Bengal dayflower (Commelina benghalensis) have been selected, due to the species tolerance to the action of that herbicide. This way, the use of alternative management is necessary, which are dependent upon deep knowledge on species biology; as well as, the efficient chemical
Publicado em: 2009
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16. Qualidade fisiolÃgica de sementes de soja convencional e RR associada ao conteÃdo de lignina / Physiological quality of conventional and RR soybean seeds associated with lignin content
In the latest crops, a strong and growing adherence of Brazilian farmers to RR transgenic soybean was found. Nevertheless, the hypothesis has been raised that these soybean cultivars are presenting differential hypotheses concerning the lignin contents in the plant, when compared with conventional cultivars. Such a variation could be occurring not only in th
Publicado em: 2009
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17. Glyphosate no controle de Brachiaria brizantha em áreas cultivadas com Tifton 85 (Cynodon spp.) / Glyphosate on Brachiaria brizantha control in areas cultivated with Tifton 85 (Cynodon spp.)
Brachiaria brizantha, a forage specie, is considered weed of difficult control when in pasture of Tifton 85 because, of its high capacity of interference and multiplication. Being important to search alternatives of controlling B. brizantha and the necessity to know real effects of glyphosate on Tifton 85 plants, three experiments were carried out in order t
Publicado em: 2006
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18. Respostas bioquímicas e fisiológicas de plantas de citros atingidas pelo glyphosate / Biochemical and physiological citrus plants responses under glyphosate application
The objective of this research was to evaluate physiological and biochemical responses of citrus (Citrus spp.) plants sprayed with the herbicide glyphosate. Four studies were done to attain this objective. By the first one, it were investigated the effects of glyphosate (dosages from 0 to 720 g a.e.ha-1 applied on plants canopies) on the leaf contents of shi
Publicado em: 2006
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19. Dinâmica populacional e mecanismos de tolerância de espécies de plantas daninhas ao herbicida Glyphosate. / Population dynamic and tolerance mechanisms of weed species to the glyphosate herbicide.
Intensive applications of the herbicide glyphosate for weed control may result in the weed population changes, through selection pressure of the glyphosate tolerant weed species. However, the glyphosate tolerance mechanisms of these species are not completely understood, and the elucidation of these mechanisms is fundamental to the recommendations of alterna
Publicado em: 2003
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20. Glyphosate Tolerance in Tobacco (Nicotiana tabacum L.) 1
A glyphosate-tolerant tobacco cell line, Nicotiana tabacum L. Indiana (I7), was selected from the glyphosate-sensitive Wisconsin 38 (W38) line through a single step exposure to the herbicide. Tolerance and growth characteristics of I7 cells were the same for cells maintained for more than 1 year in the presence or absence of glyphosate. Glyphosate tolerance
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21. Fitness costs and benefits of novel herbicide tolerance in a noxious weed
Glyphosate, the active ingredient in the herbicide RoundUp, has increased dramatically in use over the past decade and constitutes a potent anthropogenic source of selection. In the southeastern United States, weedy morning glories have begun to develop tolerance to glyphosate, representing a unique opportunity to examine the evolutionary genetics of a novel
National Academy of Sciences.
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22. Cloning and sequencing of the genes involved in glyphosate utilization by Pseudomonas pseudomallei.
Thirty-four strains of Pseudomonas pseudomallei isolated from soil were selected for their ability to degrade the phosphonate herbicide glyphosate. All strains tested were able to grow on glyphosate as the only phosphorus source without the addition of aromatic amino acids. One of these strains, P. pseudomallei 22, showed 50% glyphosate degradation in 40 h i
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23. Amplification of the aroA gene from Escherichia coli results in tolerance to the herbicide glyphosate.
The predominant cellular target of the herbicide glyphosate is thought to be the enzyme 5-enolpyruvylshikimate-3-phosphoric acid synthase (EPSP synthase). As a means of biologically testing this finding, we cloned a segment of DNA from Escherichia coli that encodes this enzyme. Clones carrying the gene for EPSP synthase were identified by genetic complementa
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24. Glyphosate-Resistant Goosegrass. Identification of a Mutation in the Target Enzyme 5-Enolpyruvylshikimate-3-Phosphate Synthase
The spontaneous occurrence of resistance to the herbicide glyphosate in weed species has been an extremely infrequent event, despite over 20 years of extensive use. Recently, a glyphosate-resistant biotype of goosegrass (Eleusine indica) was identified in Malaysia exhibiting an LD50 value approximately 2- to 4-fold greater than the sensitive biotype collecte
American Society of Plant Physiologists.