A5025844712- Weed Control and Herbicide Applications
- Pesticide and Herbicide Environmental Studies
- Plant tissue culture and regeneration
- Legume Nitrogen Fixing Symbiosis
- Agronomic Practices and Intercropping Systems
- Plant and fungal interactions
- Allelopathy and phytotoxic interactions
- Plant and animal studies
- Genetically Modified Organisms Research
- Turfgrass Adaptation and Management
- CRISPR and Genetic Engineering
- Botanical Research and Chemistry
- Ecology and Vegetation Dynamics Studies
- Nematode management and characterization studies
- Digital Rights Management and Security
- Bioenergy crop production and management
- Insect-Plant Interactions and Control
- Copyright and Intellectual Property
- Plant Virus Research Studies
- Mycorrhizal Fungi and Plant Interactions
- Plant Pathogens and Fungal Diseases
- Genetic Mapping and Diversity in Plants and Animals
- Plant Toxicity and Pharmacological Properties
University of Buenos Aires
2015-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2014-2024
Agricultural Plant Physiology and Ecology Research Institute
2014-2024
The University of Western Australia
2012-2024
Universidad Nacional de La Plata
2015
The University of Adelaide
2015
Comisión de Investigaciones Científicas
2015
National University of General San Martín
2009
Twenty-two amino acid substitutions at seven conserved residues in the acetohydroxyacid synthase (AHAS) gene have been identified to date that confer target-site resistance AHAS-inhibiting herbicides biotypes of field-evolved resistant weed species. However, effect mutations on AHAS functionality and plant growth has investigated for only a very few mutations. This research investigates various Lolium rigidum growth. The enzyme kinetics from five purified L. populations, each homozygous...
Synthetic herbicides have been used globally to control weeds in major field crops. This has imposed a strong selection for any trait that enables plant populations survive and reproduce the presence of herbicide. Herbicide resistance must be minimized because it is limiting factor food security global agriculture. represents huge challenge will require great research efforts develop strategies as alternatives dominant almost exclusive practice weed by herbicides. Weed scientists, ecologists...
Abstract Weeds are attractive models for basic and applied research due to their impacts on agricultural systems capacity swiftly adapt in response anthropogenic selection pressures. Currently, a lack of genomic information precludes elucidate the genetic basis rapid adaptation important traits like herbicide resistance stress tolerance effect evolutionary mechanisms wild populations. The International Weed Genomics Consortium is collaborative group scientists focused developing resources...
Summary Quantification of fitness differences between herbicide‐resistant and herbicide‐susceptible weeds permits better prediction herbicide resistance, the design weed management strategies to exploit those traits that result in reduced ecological performance. Reported here is first attempt compare germination seedling emergence characteristics one two phenotypes from a single population. A series experiments was carried out controlled conditions study seed Lolium rigidum possessing...
Abstract BACKGROUND: In a large cropping area of northern Argentina, Sorghum halepense (Johnsongrass) has evolved towards glyphosate resistance. This study aimed to determine the molecular and biochemical basis conferring resistance in this species. Experiments were conducted assess target EPSPS gene sequences 14 C‐glyphosate leaf absorption translocation meristematic tissues. RESULTS: Individuals all resistant (R) accessions exhibited significantly less root (11% versus 29%) stem (9% 26%)...
Since the beginning of agriculture, crops have been exposed to recurrent invasion by weeds that can impose severe reductions in crop quality and yield. There continuing efforts reduce impacts on production. More than 40 yr ago, overreliance herbicide technology weed infestations resulted selection adaptive traits enabled survival reproduction under treatments (Délye et al. 2007; Powles Yu 2010; Vila-Aiub 2008). As a result, resistance > 200 species has evolved worldwide (Heap 2013;
Abstract A novel glyphosate resistance double point mutation (T102I/P106S, TIPS) in the 5‐enolpyruvylshikimate‐3‐phosphate synthase (EPSPS) gene has been recently identified for first time only weed species Eleusine indica . Quantification of plant cost associated with TIPS and often reported single P106S was performed. significant (50% seed number currency) homozygous but not EPSPS variant E. plants. The escalated to 85% plants under resource competition rice crops. detected nonhomozygous...
Abstract We reviewed and performed a quantitative synthesis on herbicide‐resistant weeds from rain‐fed crops in Argentina. Twenty‐four weed species distributed the main extensive (soybean, maize, wheat, barley, oilseed rape, sunflower, chickpea peanut) have evolved herbicide resistance. Of total, 54% are grasses, 88% annual 63% cross‐pollinated species. The most representative families were Poaceae with resistant species, followed by Brassicaceae 17%, Asteraceae 13%. Buenos Aires, Santa Fe...
• Costs of resistance are predicted to reduce plant productivity in herbicide-resistant weeds. Lolium rigidum herbicide-susceptible individuals (S), possessing cytochrome P450-based herbicide metabolism (P450) and multiple resistant a ACCase enhanced P450 (ACCase/P450) were grown the absence mutual interaction estimate growth traits. Both ACCase/P450 phenotypes produced less above-ground biomass than S phenotype during vegetative stage. Reduced production corresponded reduced relative rate...
In Argentinean crop fields, weed control is mainly achieved by intense use of glyphosate as a nonselective and/or selective herbicide. Glyphosate very high more than 95% the 16 million ha soybean consists glyphosate-resistant cultivars, always treated with this From initial success, inconsistent Johnsongrass, an invading C4 perennial grass crops, has become evident to producers from northern Argentina over last 3 yr. Prior this, provided good control. This study evaluated nature these...
1 In some cases, evaluation of resource competitive interactions between herbicide resistant vs. susceptible weed ecotypes provides evidence for the expression fitness costs associated with evolved herbicide-resistant gene traits. Such impact in ecology and evolutionary trajectory populations. 2 Neighbourhood experiments were performed to quantify effects responses herbicide-susceptible (S) (R) Lolium rigidum individuals which resistance is due enhanced metabolism mediated by cytochrome...
Glyphosate resistance in populations of the C(4) perennial Sorghum halepense (Johnsongrass) and C(3) annual Lolium rigidum (rigid ryegrass) has evolved been documented many cropping areas around globe. In S. majority reported cases L. glyphosate trait associated with a mechanism that reduces translocation within plants. Here, significant decrease level when resistant plants are grown at suboptimal cool temperature conditions is reported.Lowering from 30 to 19 °C 8 significantly reduced both...
Herbicides have been the primary tool for controlling large populations of yield depleting weeds from agro-ecosystems, resulting in evolution widespread herbicide resistance. In response, nonherbicidal techniques developed which intercept weed seeds at harvest before they enter soil seed bank. However, efficiency these allows an intense selection any trait that enables to evade collection, with early-flowering ecotypes considered likely result early shedding. Using a field-collected wild...
The net selection effect of herbicides on herbicide-resistance traits in weeds is conditioned by the fitness benefits and costs associated with resistance alleles. Fitness play an important evolutionary role preventing fixation adaptive alleles contributing to maintenance genetic polymorphisms within populations. Glyphosate widely used world agriculture, which has led evolution widespread glyphosate many weed species. glyphosate-resistant -susceptible perennial ryegrass plants selected from...