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Registros recuperados: 11
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A Trp574Leu Target-Site Mutation Confers Imazamox Resistance in Multiple Herbicide-Resistant Wild Poinsettia Populations from Brazil. Repositório Alice
MENDES, R. R.; TAKANO, H. K.; OLIVEIRA JUNIOR, R. S.; ADEGAS, F. S.; GAINES, T. A.; DAYAN, F. E..
Tipo: Artigo de periódico Palavras-chave: Herbicida; Euphorbia Heterophylla; Mutação; Resistência a Pesticida; Acetolactate synthase; Mutation; Herbicide resistance.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129252
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Activity of Antioxidant Enzymes in Euphorbia heterophylla Biotypes and their Relation to Cross Resistance to ALS and Protox Inhibitors Planta Daninha
XAVIER,E.; TREZZI,M.M.; OLIVEIRA,M.C.; VIDAL,R.A.; BRUSAMARELLO,A.P..
ABSTRACT: The characteristics of multiple resistance in Euphorbia heterophylla biotypes to herbicides that are inhibitors of ALS (Acetolactate synthase) and PPO (Protoporphyrinogen oxidase) and their responsible mechanisms are still not completely elucidated. The objectives of this study were to identify cross-resistance to herbicides from different chemical groups of ALS inhibitors (imidazolinones, sulfonylureas, pyrimidyl benzoates and sulfonanilides) and also PPO inhibitors (diphenylethers, phthalamides, oxadiazoles, triazolinones and pyrimidinediones) in E. heterophylla biotypes with multiple resistance to these herbicides; to analyze whether the antioxidant enzymes superoxide dismutase (SOD) and peroxidase (POD) constitute mechanisms that are...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dose-response curves; Superoxide dismutase; Peroxidase; Acetolactate synthase; Protoporphyrinogen oxidase.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100340
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Characterization of the acetohydroxyacid synthase multigene family in the tetraploide plant Chenopodium quinoa Electron. J. Biotechnol.
Mestanza,Camilo; Riegel,Ricardo; Silva,Herman; Vásquez,Santiago C.
Background Currently, the technology called Clearfield® is used in the development of crops resistant to herbicides that inhibit the enzyme acetohydroxy acid synthase (AHAS, EC 2.2.1.6). AHAS is the first enzyme of the biosynthetic pathway that produces the branched-chain of the essential amino acids valine, leucine, and isoleucine. Therefore, multiple copies of the AHAS gene might be of interest for breeding programs targeting herbicide resistance. In this work, the characterization of the AHAS gene was accomplished for the Chenopodium quinoa Regalona-Baer cultivar. Cloning, sequencing, and Southern blotting were conducted to determine the number of gene copies. Results The presence of multiple copies of the AHAS gene as has been shown previously in...
Tipo: Journal article Palavras-chave: Acetohydroxyacid synthase; Acetolactate synthase; Chenopodium quinoa; Homeologous pairing; Gene duplication.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600002
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Effects of monosulfuron-ester on metabolic processes of nitrogen-fixing cyanobacteria Anabaena flos-aquae and Anabaena azotica BJM
Shen,Jian Ying; Liao,Jin Zhi; Guo,Li Li; Su,Rui Fang.
Abstract Presence of the relatively new sulfonylurea herbicide monosulfuron-ester at 0.03-300 nmol/L affected the growth of two non-target nitrogen-fixing cyanobacteria (Anabaena flos-aquae and Anabaena azotica) and substantially inhibited in vitro Acetolactate synthase activity, with IC50 of 3.3 and 101.3 nmol/L for A. flos-aquae and A. azotica, respectively. Presenting in 30-300 nmol/L, it inhibited protein synthesis of the cyanobacteria with less amino acids produced as its concentration increased. Our findings support the view that monosulfuron-ester toxicity in both nitrogen-fixing cyanobacteria is due to its interference with protein metabolism via inhibition of branch-chain amino acid biosynthesis, and particularly Acetolactate synthase activity.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acetolactate synthase; Amino acids; Cyanobacteria; Monosulfuron-ester.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000300544
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Enzymatic properties and ryegrass resistance mechanism to iodosulfuron-methyl-sodium herbicide. Repositório Alice
MARIANI, F. S; SENSEMAM, S. A.; VARGAS, L.; AGOSTINETO, D.; ÁVILA, L. A.; SANTOS, F. M..
Tipo: Artigo de periódico Palavras-chave: Azevém; Erva Daninha; Lolium Multiflorum; Herbicida; Aminoácido; Weeds; Herbicides; Acetolactate synthase; Amino acids; Sulfonylureas.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113379
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Evolutionary and social consequences of introgression of nontransgenic herbicide resistance from rice to weedy rice in Brazil. Repositório Alice
MEROTTO JUNIOR, A.; GOULART, I. C. G. dos R.; NUNES, A. L.; KALSING, A.; MARKUS, C.; MENEZES, V. G.; WANDER, A. E..
Several studies have expressed concerns about the effects of gene flow from transgenic herbicide-resistant crops to their wild relatives, but no major problems have been observed. This review describes a case study in which what has been feared in transgenics regarding gene flow has actually changed biodiversity and people?s lives. Nontransgenic imidazolinone-resistant rice (IMI-rice) cultivars increased the rice grain yield by 50% in southern Brazil. This increase was beneficial for life quality of the farmers and also improved the regional economy. However, weedy rice resistant to imidazolinone herbicides started to evolve three years after the first use of IMI-rice cultivars. Population genetic studies indicate that the herbicide- resistant weedy rice...
Tipo: Artigo de periódico Palavras-chave: Fluxo de genes; Clearfield TM; Fitness; Arroz; Herbicida; Red rice; Herbicide resistance; Outcrossing; Imazethapyr; Gene flow; Acetolactate synthase.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065797
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Globe fringerush (Fimbristylis miliacea) cross resistance to als-inhibitor herbicides under field conditions in irrigated rice in the south of Brazil Planta Daninha
Schaedler,C.E.; Noldin,J.A.; Eberhardt,D.S.; Agostinetto,D.; Burgos,N.R..
ALS-inhibiting herbicides usually provide adequate weed control in irrigated rice fields. After consecutive years of use, the Cyperaceae species, globe fringerush (Fimbristylis miliacea) began to show resistance to ALS (acetolactate synthase) inhibitors. Globe fringerush is one of the most problematic herbicide-resistant weeds in irrigated rice in the state of Santa Catarina in the South of Brazil. The objective of this research was to examine cross resistance of globe fringerush to ALS inhibitors, under field conditions. Two experiments were conducted in a rice field naturally infested with ALS-resistant globe fringerush in Santa Catarina, in the 2008/09 and 2009/10 cropping seasons. The experimental units were arranged in randomized complete block...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Paddy rice; Oryza sativa; Herbicide resistance; Acetolactate synthase.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400016
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Resistance detection of blackjack to ALS inhibitors by in vitro plant growth method Planta Daninha
Tessaro,Daniela; Benneman,Daiane; T. Perboni,Lais; R. Garcia,Jéssica; M. Teixeira,Marlon; Agostinetto,Dirceu.
Abstract Background: The resistance of weeds to herbicides is a problem that has been increasingly studied because of its great importance in agriculture and rapid growth of this phenomenon worldwide. The quick detection of resistant plants is extremely important for resistance management. Weed resistance to herbicides can be detected through field, greenhouse and laboratory tests. A fast way of detecting resistance is using tissue culture method, where is possible to use resistant plant clones and obtain results faster than whole-plant method in greenhouse. Objective: The aims of the research were to detect the resistance of blackjack to herbicides inhibitors of the acetolactate synthase (ALS), addition in vitro cultivation; determine the herbicide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bidens Pilosa; Resistance test; Acetolactate synthase; Weed.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100315
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Resistance Mapping of the Genus Cyperus in Rio Grande do Sul and Selection Pressure Analysis Planta Daninha
ULGUIM,A.R.; SILVA,B.M.; AGOSTINETTO,D.; AVILA NETO,R.C.; ZANDONÁ,R.R..
ABSTRACT: Among the species of the genus Cyperus occurring in paddy rice, C. esculentus, C. difformis and C. iria are the most important, and the latter two are reported as resistant to herbicides in Rio Grande do Sul (RS). The aim of this work was to characterize and mapping the occurrence of resistant plants of the genus Cyperus in areas of paddy rice in RS State, and to analyze the agronomic factors that interfere in the resistance selection. Seeds from individual plants were harvested in the 2014/15 crop, characterized as control failures by the application of acetolactate synthase inhibitors (ALS), totaling 43 samples. At the time of collection, the grower was inquired on aspects related to the management of weeds in the crop. Seeds were germinated in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acetolactate synthase; Cyperus esculentus; C. iria; C. difformis; Irrigated rice.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100254
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Resistance of Raphanus raphanistrum to the herbicide metsulfuron-methyl Planta Daninha
Costa,L.O.; Rizzardi,M.A..
The ALS-inhibiting herbicides, especially metsulfuron-methyl, are widely used for weed control, mainly wheat and barley in southern Brazil. Raphanus raphanistrum is a major weed of winter crops. However, in recent years, R.raphanistrum, after being treated with metsulfuron, has shown no symptoms of toxicity, possibly due to herbicide resistance. Aiming to evaluate the existence of R.raphanistrum biotypes resistant to metsulfuron, an experiment was conducted in a greenhouse, in a completely randomized design with four replications. The plots consisted of pots with six plants. The treatments consisted of the interaction of resistant R. raphanistrum (biotype R) and susceptible R. raphanistrum (biotypes S) with ten doses of the herbicide (0.0; 0.6; 1.2; 2.4;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acetolactate synthase; Dose-response; Weed; Resistance factor.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100020
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Resistence of Radish Biotypes to Iodosulfuron and Alternative Control Planta Daninha
CECHIN,J.; VARGAS,L.; AGOSTINETTO,D.; ZIMMER,V.; PERTILE,M.; GARCIA,J.R..
The repetitive use of iodosulfuron for the control of weeds in winter cereals in the south of Brazil has favored the emergence of resistant Raphanus sativus biotypes. The objective of this study was to evaluate: the response of Raphanus sativus biotypes susceptible and resistant to different dosages of iodosulfuron; the control of biotypes with alternative registered herbicides for the control of the species in crops of wheat, corn and soybean; and the existence of cross-resistance of the biotypes. Thus, four experiments were done in a greenhouse, with a completely randomized design and four replicates. The experimental units were composed of vases with a volumetric capacity of 0.75 L filled with substrate, containing a plant each. For the dose-response...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Raphanus sativus; Dose-response; Acetolactate synthase; Weed.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100151
Registros recuperados: 11
Primeira ... 1 ... Última
 

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