A5086998096- Plant Micronutrient Interactions and Effects
- Aluminum toxicity and tolerance in plants and animals
- Plant nutrient uptake and metabolism
- Weed Control and Herbicide Applications
- Plant Stress Responses and Tolerance
- Pesticide and Herbicide Environmental Studies
- Silicon Effects in Agriculture
- Plant tissue culture and regeneration
- Growth and nutrition in plants
- Plant Molecular Biology Research
- Plant Disease Resistance and Genetics
- Seed Germination and Physiology
- Crop Yield and Soil Fertility
- Wheat and Barley Genetics and Pathology
- Plant responses to water stress
- Yeasts and Rust Fungi Studies
- Genetic Mapping and Diversity in Plants and Animals
- Legume Nitrogen Fixing Symbiosis
- Allelopathy and phytotoxic interactions
- Plant-Microbe Interactions and Immunity
- Soybean genetics and cultivation
- Plant Reproductive Biology
- Genetics and Plant Breeding
- Banana Cultivation and Research
- Clay minerals and soil interactions
Universidade Federal do Rio Grande do Sul
2013-2023
University of Rio Grande and Rio Grande Community College
2006-2023
Heinrich Heine University Düsseldorf
2017
Servicio Regional de Investigación y Desarrollo Agroalimentario
2014
University of California, Davis
2000-2013
Universidade Federal de Viçosa
1996-2011
Universidade Estadual do Centro-Oeste
2011
Centro de Investigaciones Biológicas Margarita Salas
1989
The effects of water deficit on carbon and nitrogen metabolism were investigated in flag leaves wild-type transgenic rice (Oryza sativa japonica 'Kitaake') plants expressing ISOPENTENYLTRANSFERASE (IPT; encoding the enzyme that mediates rate-limiting step cytokinin synthesis) under control P(SARK), a maturation- stress-induced promoter. While displayed inhibition photosynthesis assimilation during stress, neither nor was affected by stress P(SARK)::IPT plants. In plants, maintained at levels...
Phosphate (Pi) plays a central role as reactant and effector molecule in plant cell metabolism. However, Pi is the least accessible macronutrient many ecosystems its low availability often limits growth. Plants have evolved an array of molecular morphological adaptations to cope with limitation, which include dramatic changes gene expression root development facilitate acquisition recycling. Although physiological responses starvation been increasingly studied understood, initial events that...
Summary Plants have evolved complex strategies to maintain phosphate (Pi) homeostasis and maximize Pi acquisition when the macronutrient is limiting. Adjustment of root system architecture via changes in meristem initiation activity integral acclimation process. However, mechanisms that monitor external status interpret nutritional signal remain be elucidated. Here, we present evidence deficiency response , pdr2 mutation disrupts local sensing. The sensitivity amplitude metabolic...
Barley is a major cereal grown widely and used in several food products, beverage production animal fodder. Genetic diversity key component breeding programs. We have analyzed the genetic of barley accessions using microsatellite markers. The were composed wild domesticated representing genotypes from six countries three programs Brazil. A total 280 alleles detected, 36 unique to Brazilian barley. marker Bmag120 showed greatest polymorphism information content (PIC), with highest mean value...
Abstract Plants of Sumatran fleabane [ Conyza sumatrensis (Retz.) E. Walker] were identified in a field with an unusual rapid leaf-injury herbicide symptoms after application 2,4-D mixture glyphosate. The objectives this study to confirm the occurrence resistance and characterize necrosis as mechanism associated C. . studies performed initial screening, effect alone glyphosate, cross- multiple-resistance evaluation, commercial formulation analytical product, rate H 2 O evolution. Marpr9-rn...
Chilling requirement for bud dormancy completion determines the time of break in apple (Malus × domestica Borkh.). The molecular control is highly heritable, suggesting a strong genetic trait. An available Infinium II SNP platform genotyping containing 8,788 single nucleotide polymorphic markers was employed, and linkage maps were constructed F1 cross from low chilling cv. M13/91 moderate Fred Hough. These used to identify quantitative trait loci (QTL) date as related release. A major QTL...
Seasonal drought, typical of temperate and Mediterranean environments, creates problems in establishing plantations affects development yield, it has been widely studied numerous species. Forestry fast-growing species such as Eucalyptus spp. are an important resource selected clones being generally used for production purposes these areas. However, use mono-specific increases risk plant loss due to abiotic stresses, making essential understand differences individual clone's physiological...
Soybean is a major crop cultivated in Brazil, and acetolactate synthase (ALS)-inhibiting herbicides are widely used to control weeds this crop. The continuous use of these ALS-inhibiting has led the evolution herbicide-resistant worldwide. Greater beggarticks polyploid species one most troublesome soybean production since discovery ALS-resistant biotypes 1996. To confirm characterize resistance greater ALS inhibitors, whole-plant bioassays enzyme experiments were conducted. investigate...
Most strawberry (Fragaria × ananassa Duchesne) cultivars used in Brazil are developed other countries, it became clear the need to start breeding program country. To a is necessary genetic characterization of germplasm available. Molecular markers important tools that can be for this purpose. The objectives present study were assess similarity among 11 using RAPD and ISSR molecular indicate possible promising crosses. DNA eleven was extracted amplified by PCR with primers. fragments...
Outside its centers of origin, garlic propagates only asexually.Since asexual reproduction leads to the absence meiotic recombination, main cultivars available for cultivation have arisen from accumulation somatic mutations in early cultivars.Thus, it is common a single clone different names regions.This study aimed evaluate genetic diversity 20 by using morphological characters and amplified fragment length polymorphism (AFLP) markers identify possible duplicate cultivars.We assessed 28...
Abstract Seed shattering is an evolutionary trait that essential to the survival of wild and weedy rice. Discovery q SH 1 gene in rice subspecies Japonica Sh4 Indica indicated possibility seed governed by major genes a qualitative manner. However, observation large variability has led us hypothesise other related abscission layer integrity could also be important regulation Gene expression 10 days after pollination nucleotide composition revealed qSH are described as players were not High Os...
Cultivares de arroz resistentes aos herbicidas imidazolinonas têm proporcionado a utilização destes para o controle do arroz-vermelho, que é um dos principais problemas da cultura irrigado. No entanto, biótipos arroz-vermelho ocorrido em várias lavouras dessa cultura. O objetivo deste trabalho foi desenvolver métodos expeditos identificação plantas diferentes fases desenvolvimento planta. Foram utilizados os cultivares IRGA 422 CL, SATOR CL e PUITÁ INTA como padrão resistente imidazolinonas,...
Abstract Seed shattering is one of the main traits related with domestication cultivated rice and invasiveness persistence weedy rice. Two independent studies in 2006 have indicated that qSH1 Japonica Sh4 Indica are major genes governing this trait. However, a wide variation seed occurs ecotypes from same geographic region even within ecotype. The aim study was to evaluate nucleotide variability known putative identify validate new trait gene not associated evaluated genotypes. Os01g0849100...
Abstract Resistant plants of Sumatran fleabane with unusual rapid necrosis (RN) symptoms after application 2,4-D were characterized in previous studies. Field observations indicated variability the occurrence RN caused by 2,4-D, but causes variation are unknown. This study aimed to investigate effect environmental conditions, plant growth stage, and simultaneous sequential herbicide mixtures other auxin mimics on 2,4-D. Application at temperature 12 C delayed decreased intensity still...
Abstract Physiological dormancy of scarified seeds Townsville stylo ( Stylosanthes humilis HBK) was released by acidic aluminium (Al 3+ ) solution. Antiethylenic substances inhibited germination low-pH-stimulated dormant seeds, with a correspondingly low ethylene production and activity 1-aminocyclopropane-1-carboxylate (ACC) oxidase in seeds. On the other hand, antiethylenic did not decrease Al -stimulated but ACC decreased to large extent. These data provide evidence that breakage differs...
Cadmium, copper and zinc ions at high concentrations partially released scarified freshly-harvested seeds ofStylosanthes humilis from physiological dormancy. This response to toxic metals increased along with seed postharvest ageing. Cobalt silver ions, abscisic acid impaired metal-promoted germination.
O objetivo deste trabalho foi testar uma metodologia para determinar doses ótimas de N a serem aplicadas em cobertura, no estádio V6 do milho, com base características solo e planta, verificar quais os indicadores mais precisos predição da dose ser aplicada. experimento conduzido Eldorado Sul, RS, dois anos agrícolas. Os tratamentos consistiram cinco N, duas épocas. Além rendimento grãos, determinaram-se, V6, o teor relativo clorofila na folha, as massas matéria seca folha quantidade...