A5022508276- Plant Micronutrient Interactions and Effects
- Plant Stress Responses and Tolerance
- Aluminum toxicity and tolerance in plants and animals
- Trace Elements in Health
- Photosynthetic Processes and Mechanisms
- Plant nutrient uptake and metabolism
- Plant tissue culture and regeneration
- Alkaloids: synthesis and pharmacology
- Chromium effects and bioremediation
- Geochemistry and Elemental Analysis
- Plant responses to elevated CO2
- Plant Diversity and Evolution
- Phytochemistry Medicinal Plant Applications
- GABA and Rice Research
- Traditional and Medicinal Uses of Annonaceae
- Plant Molecular Biology Research
- Plant-Microbe Interactions and Immunity
- Fern and Epiphyte Biology
- Chemical synthesis and alkaloids
- Caveolin-1 and cellular processes
- Plant Gene Expression Analysis
- Microbial Community Ecology and Physiology
- Cocoa and Sweet Potato Agronomy
- Rice Cultivation and Yield Improvement
- Light effects on plants
Universidade Federal do Rio Grande do Sul
2015-2025
Institute of Molecular Medicine
2023
John Innes Centre
2014-2022
Norwich Research Park
2017
University of Southampton
2013-2017
University of Rio Grande and Rio Grande Community College
2012
Zinc (Zn) is an essential micronutrient for plants, playing catalytic or structural roles in enzymes, transcription factors, ribosomes and membranes. In humans, Zn deficiency the second most common mineral nutritional disorder, affecting around 30% of world's population. People living poverty usually have their diets based on milled cereals, which contain low concentrations. Biofortification crops attractive cost-effective solution dietary intake. order to increase amounts bioavailable crop...
Heavy metal homeostasis is maintained in plant cells by specialized transporters which compartmentalize or efflux ions, maintaining cytosolic concentrations within a narrow range. OsMTP1 member of the cation diffusion facilitator (CDF)/metal tolerance protein (MTP) family Oryza sativa, closely related to Arabidopsis thaliana MTP1. Functional complementation T-DNA insertion mutant mtp1-1 demonstrates that transports Zn planta and localizes at tonoplast. When heterologously expressed yeast...
Oryza sativa, the common cultivated rice, is one of most important crops for human consumption, but production increasingly threatened by abiotic stresses. Although many efforts have resulted in breeding rice cultivars that are relatively tolerant to their local environments, climate changes and population increase expected soon call new, fast generation stress germplasm, current within-species diversity might not be enough overcome such needs. The genus contains other 23 wild species, with...
Abstract Background Duplications are very common in the evolution of plant genomes, explaining high number members gene families. New genes born after duplication can undergo pseudogenization, neofunctionalization or subfunctionalization. Rice is a model for functional genomics research, an important crop human nutrition and target biofortification. Increased zinc iron content rice grain could be achieved by manipulation metal transporters. Here, we describe ZINC-INDUCED FACILITATOR-LIKE...
Summary Zinc (Zn) is essential for all life forms, including humans. It estimated that around two billion people are deficient in their Zn intake. Human dietary intake relies heavily on plants, which many developing countries consists mainly of cereals. The inner part cereal grain, the endosperm, eaten after milling but contains only a quarter total grain Zn. Here, we present results demonstrating endosperm content can be enhanced through expression transporter responsible vacuolar...
EDITORIAL article Front. Plant Sci., 05 September 2014Sec. Nutrition https://doi.org/10.3389/fpls.2014.00438
Chloroplast ascorbate peroxidases exert an important role in the maintenance of hydrogen peroxide levels chloroplasts by using as specific electron donor. In this work, we performed a functional study stromal APX rice (OsAPX7) and demonstrated that silencing OsAPX7 did not impact plant growth, redox state, or photosynthesis parameters. Nevertheless, when subjected to drought stress, silenced plants (APX7i) show higher capacity maintain stomata aperture performance, resulting tolerance...
Abstract The ionome is defined as the inorganic composition of an organism. In plants, has been shown to be integrated, concentration elements affects one another, with complex regulatory mechanisms keep nutrients, trace and toxic balanced. Iron (Fe) essential micronutrient that necessary for photosynthesis, mitochondrial respiration, redox metabolism, its concentrations in plant tissues finely regulated avoid deficiency excess stresses. It known varying Fe affect other components ionome,...
Abstract The Arabidopsis thaliana MAGIC lines are the result of extensive recombination among 19 accessions, which allows a direct comparison association and linkage mapping using same population. We used both approaches to map genetic basis natural variation in leaf ionome A. thaliana. found 57 QTLs 10 significant associations, 8 co-locate with QTL analysis. This suggests genome-wide has low rate false positives these lines, but an overall lower power identify potential factors explaining...
Senescence is a coordinated process where plant, or part of it, engages in programmed cell death to salvage nutrients by remobilizing them younger tissues developing seeds. As Fe and Zn deficiency are the two major nutritional disorders humans, increased concentration these through biofortification cereal grains long-sought goal. Recent evidences point link between onset leaf senescence remobilization. In wheat, one member NAC transcription factor family (NAM-B1) has role process, probably...
Membrane transporters play a key role in obtaining sufficient quantities of manganese (Mn) but also protecting against Mn toxicity. We have characterized OsMTP11, member the Cation Diffusion Facilitator/Metal Tolerance Protein (CDF/MTP) family metal cation Oryza sativa. demonstrate that OsMTP11 functions alleviating toxicity as its expression can rescue Mn-sensitive phenotype Arabidopsis mtp11-3 knockout mutant. When expressed stably and transiently rice tobacco, it localises to Golgi....
Growth at increased concentrations of CO2 induces a reduction in seed zinc (Zn) and iron (Fe). Using Arabidopsis thaliana, we investigated whether this could be mitigated by reducing the elevated -induced decrease transpiration. We used an infrared imaging-based screen to isolate mutants At1g08080 that encodes ALPHA CARBONIC ANHYDRASE 7 (ACA7). aca7 mutant alleles display wild-type (WT) responses abscisic acid (ABA) light but are compromised their response . ACA7 is expressed guard cells....
Ascorbate peroxidases (APX) are class I members of the Peroxidase-Catalase superfamily, a large group evolutionarily related but rather divergent enzymes. Through mining in public databases, unusual subsets APX homologs were identified, disclosing existence two yet uncharacterized families named ascorbate peroxidase-related (APX-R) and peroxidase-like (APX-L). As APX, APX-R harbor all catalytic residues required for peroxidatic activity. Nevertheless, proteins this family do not contain...
NAC transcription factors are plant-specific proteins involved in many processes during the plant life cycle and responses to biotic abiotic stresses. Previous studies have shown that stress-induced OsNAC5 from rice (Oryza sativa L.) is up-regulated by senescence might be control of iron (Fe) zinc (Zn) concentrations seeds. Aiming a better understanding role plants, we investigated mutant line carrying T-DNA insertion promoter OsNAC5, which resulted enhanced expression factor. Plants with...