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Registros recuperados: 19
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Burial depths favor Italian ryegrass persistence in the soil seed bank. Repositório Alice
CECHIN, J.; SCHMITZ, M. F.; HENCKS, J. R.; VARGAS, A. A. M.; VARGAS, L..
ABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a weed broadly found in fields cultivated with wheat and barley crops. Seed inputs into the soil before harvesting winter crops increase seed bank, ensuring survival. This study evaluated the persistence of Italian ryegrass seeds subjected to burial depths over time. Experiments were carried out in the field for two years in randomized block experimental design with four repetitions. Dormant seeds harvested from mother-plants were put in nylon bags containing soil. Previously, seed viability was evaluated in a 1 % tetrazolium solution, and 50 viable seeds by repetition were buried at 0.5, 5.0, 10, and 20 cm depths. Seed persistence was evaluated by the percentage of deteriorated and remaining seeds,...
Tipo: Artigo de periódico Palavras-chave: Lolium multiflorum Lam; Seed bank weed management; Seed longevity; Soil seed bank inputs; Seed dormancy.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129847
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Caracterização e manejo de azevém (Lolium multiflorum L.) resistente a herbicidas em áreas agrícolas. Repositório Alice
VARGAS, L.; HENCKES, J. R.; SCHMITZ, M. F.; PIASECKI, C.; CECHIN, J.; TORCHELSEN, J.; AGOSTINETTO, D..
Tipo: Artigo de periódico Palavras-chave: Erva Daninha; Azevém; Weeds; Rye.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1091629
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Competitive ability of canola hybrids resistant and susceptible to herbicides. Repositório Alice
DURIGON, M. R; MARIANI, F.; CECHIN, J.; CAMERA, A. S.; VARGAS, L.; CHAVARRIA, G..
ABSTRACT - This work aimed to compare the competitive ability of canola hybrids susceptible (conventional) or resistant to triazine or imidazolinone group herbicides, with turnip. The experiments were conducted in greenhouse, in a completely randomized design, with four replicates. The hybrids Hyola 571CL (resistant to imidazolinone), Hyola 555TT (resistant to triazine), and Hyola 61 (conventional) were used. The treatments consisted of ratios (100:0; 75:25; 50:50; 25:75; 0:100%) of canola and turnip plants. The evaluation was performed 44 days after emergence, determining the leaf área (AF), dry matter of aerial part (MSPA), and stature (EST) of the plants. The competitiveness analysis was performed through diagrams and interpretation of the...
Tipo: Artigo de periódico Palavras-chave: Brassica napus L; Raphanus sativus L; Interference; Competitiveness; Interferência; Competitividade.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120639
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Crescimento de híbridos de canola resistentes e sensível a herbicidas. Repositório Alice
DURIGON, M. R.; CECHIN, J.; MARIANI, F.; DA SILVA, G. B. P.; VARGAS, L.; CHAVARRIA, G..
Plant growth analysis is useful for determining adequate management practices and exploring the maximum yield potential of cultivars or hybrids. Canola hybrids with resistance to herbicides have been studied and registered for Brazilian conditions, as they improve weed management in canola crops. This study evaluated the growth of canola hybrids resistant to triazine or imidazolinone herbicides compared to a sensitive hybrid. The experiment was conducted using a completely randomized design, with four replications, in a bifactorial scheme using three hybrids and six sampling times. The canola hybrids used were Hyola 571CL (resistant to imidazolinones), Hyola 555TT (resistant to triazines), and Hyola 61 (sensitive to both herbicides). Height, leaf area, and...
Tipo: Artigo de periódico Palavras-chave: Brassica napus L; Dry matter; Growth rate; Yield indices; Leaf area.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129873
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Does spraying of atrazine on triazine-resistant canola hybrid impair photosynthetic processes? Repositório Alice
DURIGON, M. R.; CAMERA, A. S.; CECHIN, J.; VARGAS, L.; CHAVARRIA, G..
ABSTRACT - Canola is an important rotation crop for the winter season and the use of atrazine-resistant hybrids can lead to an increase in yield. This work was aimed at evaluating the effect of atrazine on photochemical and biochemical processes of photosynthesis in triazine-resistant canola. The experiment was conducted in a greenhouse, with triazine-resistant hybrid Hyola® 555TT, in a randomized block design with three replications. The treatments consisted of application or no application of atrazine on canola plants. The plants were assessed at one, three, five, and eight days after application (DAA) for chlorophyll indexes, modulated chlorophyll a fluorescence and gas exchange. Chlorophyll indexes were higher in canola plants treated with atrazine....
Tipo: Artigo de periódico Palavras-chave: Brassica Napus; Colza; Atrazina; Herbicida; Erva Daninha; Clorofila; Gás; Canola; Atrazine; Triazines; Herbicides; Weeds; Chlorophyll; Gas exchange; Fluorescence.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113376
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Expression of antioxidant genes and photosynthetic apparatus in the soybean crop in competition with Italian ryegrass biotypes. Repositório Alice
BENEMANN, D. de P.; CECHIN, J.; AGOSTINETTO, D.; VARGAS, L..
Crop-weed competition induces stress in plants causing physiological changes which can be evaluated using the RT-qPCR technique. The aim of this study was to evaluate the stability of candidate reference genes and measure the relative gene expression of antioxidant enzymes and components of the photosynthetic apparatus in soybean in competition with glyphosate-susceptible and resistant Italian ryegrass (Lolium multiflorum Lam.). The experiment was carried out in a greenhouse using replacement series between soybean and Italian ryegrass biotypes. In this study, candidate reference genes were evaluated for use as controls in RT-qPCR to quantify gene expression. An evaluation was made of genes that encode catalase, ascorbate peroxidase, superoxide dismutase,...
Tipo: Artigo de periódico Palavras-chave: Antioxidant enzymes; Candidate reference genes; Physiological changes; Plant competition.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129875
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Fitness cost and competitive ability of ryegrass susceptible and with multiple resistance to Glyphosate, Iodosulfuron-methyl, and Pyroxsulam. Repositório Alice
HENCKES, J. R.; CECHIN, J.; SCHMITZ, M. F.; PIASECKI, C.; VARGAS, L.; AGOSTINETTO, D..
ABSTRACT - Ryegrass is an important weed in wheat cultivations due to the evolution of resistance to different mechanisms of action. This study aimed to compare the phenological development, fitness cost, and competitive ability between ryegrass biotypes susceptible and with multiple resistance to 5-enolpyruvylshikimate3-phosphate synthase (EPSPs) and acetolactate synthase (ALS) inhibiting herbicides. Fitness cost and phenological development were evaluated from biotypes grown in pots, and morphological growth variables were determined up to 140 days after emergence. Phenological development was evaluated with a fitness cost. Competitive ability was determined in a replacement-series experiment with proportions of resistant and susceptible ryegrass. The...
Tipo: Artigo de periódico Palavras-chave: Iodosulfuron-methyl; Pyroxsulam; Azevém; Lolium Multiflorum; Erva Daninha; Herbicida; Glyphosate.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113373
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Gene expression related to oxidative stress induced by herbicides in rice. Repositório Alice
AGOSTINETTO, D.; BENEMANN, D. P.; CECHIN, J.; NOHATTO, M. A.; LANGARO, A. C.; PIASECKI, C.; VARGAS, L..
Herbicides are stressors that can have negative effects on plants. In Oryza sativa (L.), differential gene expression may be evalu-ated through real-time reverse transcription quantitative poly-merase chain reaction (RT-qPCR). The aim of this study was to evaluate the stability of candidate reference genes and to quan-tify the relative expression of oxidative stress genes at different times (12, 24, 48, and 96 hours after treatment [HAT]) with penoxsulam, cyhalofop-butyl, and bentazon herbicides. Norm-Finder, BestKeeper, and GeNorm software and the compara-tive ∆Ct method were used to assess expression stability and to determine the RT-qPCR threshold values of the candidate reference genes. The UBQ5 gene was the most stable among the reference...
Tipo: Artigo de periódico Palavras-chave: Oryza Sativa; Rice; Gene expression; Oxidative stress; Herbicides.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120636
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Herbicidas Triazinas sobre a fisiologia e acúmulo de matéria seca em canola resistente. Repositório Alice
CAMERA, A. S.; DURIGON, M. R.; CECHIN, J.; TOMM, G. O.; VARGAS, L.; LAMAS JUNIOR, G. L. C..
Tipo: Parte de livro Palavras-chave: Planta daninha; Colza; Erva daninha.; Weeds.; Canola.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083974
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Interference of volunteer corn on soybean cultivars growth and yield. Repositório Alice
CARATTI, F. C.; LAMEGO, F. P.; BIANCHI, M. A.; CECHIN, J.; FARIAS, H.; SILVA, B. M. da.
Spontaneous corn plants in soybean crop are considered weeds because they compete for the same environmental resources. The objective of this study was to evaluate the competitive ability of soybean cultivars when in coexistence with spontaneous corn plants. A field experiment was conducted in CCGLTEC, Cruz Alta/RS, in 2014/15, in a split-plot design, with the main plot being composed of four different cultivars (CD 2694, BMX 7166, TEC 5718, TEC 6029) and the subplots of interference conditions (without the presence of corn volunteer plants, in the presence of corn until the V3, V6, V9 stages, or for the entire soybean cycle. Leaf area, shoot dry mass, plant height, chlorophyll index, and development stage were determined at 15, 30, and 49 DAE; we also...
Tipo: Separatas Palavras-chave: Soja; Milho; Produção.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1105672
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May the crossing between diploid and tetraploid Italian ryegrass transfer glyphosate resistance to the next generation? Repositório Alice
SCHMITZ, M. F.; CECHIN, J.; VARGAS, A. A. M.; HENCKES, J. R.; VARGAS, L.; AGOSTINETTO, D.; ROCHA, B. H. G.; BOBROWSKI, V. L..
Italian ryegrass (Lolium multiflorum Lam.) is a grass weed found in winter cereals, with several glyphosate-resistant diploid populations. Furthermore, the use of Italian ryegrass tetraploid genotypes creates an opportunity to increase the forage demand in replacement of diploid populations. The aim of this research was to evaluate the crossing capacity between glyphosate-resistant diploid and tetraploid Italian ryegrass to transfer glyphosate resistance to the next generation. Reciprocal crosses were performed using the susceptible tetraploid cultivar INIA Titan and resistant diploid (SVA04 biotype) plants to obtain the F1 progeny. Germination testing, survival percentage, inheritance of glyphosate-resistance, and ploidy level were evaluated in F1...
Tipo: Artigo de periódico Palavras-chave: Lolium multiflorum Lam; Ploidy level; Chromosome counting; Resistance.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129876
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Mutation of Trp-574-Leu ALS gene confers resistance of radish biotypes to iodosulfuron and imazethapyr herbicides. Repositório Alice
CECHIN, J.; VARGAS, L.; AGOSTINETTO, D.; LAMEGO, F. P.; MARIANI, F.; DAL MAGRO, T..
Tipo: Separatas Palavras-chave: Enzima; Mutação hereditária; Metabolismo vegetal; Nabo; Herbicida; Raphanus Sativus.; Enzymes; Mutation; Turnips; Herbicides..
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1070083
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Oxidative stress and differential antioxidant enzyme activity in glyphosate-resistant and -sensitive hairy fleabane in response to glyphosate treatment. Repositório Alice
PIASECKI, C.; CARVALHO, I. R.; CECHIN, J.; GOULART, F. A. P.; MAIA, L. C. da; AGOSTINETTO, D.; CAVERZAN, A.; STEWART JR, C. N.; VARGAS, L..
Tipo: Artigo de periódico Palavras-chave: Buva; Glifosato; Herbicida; Erva Daninha; Conyza bonariensis; Lipid peroxidation; Herbicide resistance; Glyphosate; Weeds.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113343
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Pre-harvest herbicide application reduces the Italian ryegrass seed viability. Repositório Alice
CECHIN, J.; MAZON, A.; RAPHAELLI, S. T. DE O.; AGOSTINETTO, D.; VARGAS, L..
Italian ryegrass (Lolium multiflorum Lam.) is a troublesome weed found in temperate agricultural fields, wherein the future infestations depend on the soil seed bank. The aim of this research was to evaluate Italian ryegrass seed viability subjected to herbicide application in different phenological stages of development. Experiments were carried out in a completely randomized experimental design with four repetitions. Paraquat, ammonium-glufosinate, iodosulfuron-methyl and clethodim herbicides were applied in three development stages (pre-spike, anthesis, and grain filling) and compared to the control. The effects were evaluated by percentage of control at seven, 14, and 28 days after application (DAA), seeds per plant, 1000 seeds weight, and percentage...
Tipo: Artigo de periódico Palavras-chave: Lolium multiflorum Lam; Burndown; Non-viable seed; Pre-harvest management; Alternative practices.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129877
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Resistence of radish biotypes to iodosulfuron and alternative control. Repositório Alice
CECHIN, J.; VARGAS, L.; ZIMMER, V.; PERTILE, M.; GARCIA, J. R..
Tipo: Separatas Palavras-chave: Weed; Planta daninha; Acetolactato sintase.; Nabo; Raphanus Sativus.; Acetolactate synthase..
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1054095
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Resistencia de Raphanus sativus L. ao herbicida nicosulfurom. Repositório Alice
CECHIN, J.; RUCHEL, Q.; SCHNEIDER, T.; VARGAS, L.; AGOSTINETTO, D..
Tipo: Separatas Palavras-chave: Curva dose-resposta; Acetolactato sintase; Planta daninha; Radish; Dose-response curve; Weed.; Nabo.; Acetolactate synthase..
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1024789
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Transcriptome analysis identifies candidate target genes involved in glyphosate-resistance mechanism in lolium multiflorum. Repositório Alice
CECHIN, J.; PIASECKI, C.; BENEMANN, D. P.; KREMER, F. S.; GALLI, V.; MAIA, L. C.; AGOSTINETTO, D.; VARGAS, L..
Italian ryegrass (Lolium multiflorum; LOLMU) is one of the most troublesome weeds in temperate regions in the world. This weed species interfere with wheat, corn, rye, and oat, causing significant crop yield losses. This species has evolved glyphosate resistance, making it difcult to control. The mechanisms of glyphosate resistance are still unknown, and an understanding thereof will favor the development of new strategies of management. The present study is the first transcriptome study in LOLMU using glyphosate-resistant and -sensitive biotypes, aiming to identify and to provide a list of the candidate target genes related to glyphosate resistance mechanism. The transcriptome was assembled de novo, producing 87,433 contigs with an N50 of 740 bp and an...
Tipo: Artigo de periódico Palavras-chave: Italian ryegrass; Next-generation sequencing; RNA-Seq; Diferential gene expression; Resistance mechanism.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129871
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Transcriptomic analysis identifies new non-target site glyphosate-resistance genes in Conyza bonariensis. Repositório Alice
PIASECKI, C.; YANG, Y.; BENEMANN, D. P.; KREMER, F. S.; GALLI, V.; MILLWOOD, R. J.; CECHIN, J.; AGOSTINETTO, D.; MAIA, L. C.; VARGAS, L.; STEWART JR, C. N..
Tipo: Artigo de periódico Palavras-chave: Buva; Erva Daninha; Herbicida; Conyza bonariensis; Glyphosate; Herbicide resistance; Weeds; Gene expression.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113359
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Yield, germination and herbicide residue in seeds of preharvest desiccated wheat. Repositório Alice
PERBONI, L. T.; AGOSTINETTO, D.; VARGAS, L.; CECHIN, J.; ZANDONÁ, R. R.; FARIAS, H. de S..
Título em português: Produtividade, germinação e resíduo de herbicidas em sementes de trigo dessecado na pré-colheita.
Tipo: Artigo de periódico Palavras-chave: Triticum Aestivum; Trigo; Herbicida; Wheat; Herbicides.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1106673
Registros recuperados: 19
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