A5044903153- Plant Stress Responses and Tolerance
- Plant Micronutrient Interactions and Effects
- Aluminum toxicity and tolerance in plants and animals
- Plant nutrient uptake and metabolism
- Plant Molecular Biology Research
- Trace Elements in Health
- Arsenic contamination and mitigation
- Selenium in Biological Systems
- Heavy metals in environment
- Genetic Mapping and Diversity in Plants and Animals
- Plant responses to water stress
- Plant Reproductive Biology
- Chromosomal and Genetic Variations
- Nitrogen and Sulfur Effects on Brassica
- Plant Surface Properties and Treatments
- Plant tissue culture and regeneration
- Photosynthetic Processes and Mechanisms
- Rice Cultivation and Yield Improvement
- Legume Nitrogen Fixing Symbiosis
- Wheat and Barley Genetics and Pathology
- Heavy Metals in Plants
- Plant Genetic and Mutation Studies
- Oil Spill Detection and Mitigation
- Bioinformatics and Genomic Networks
- Risk and Safety Analysis
University of Aberdeen
2011-2025
University of Nottingham
2016-2025
Loughborough University
2016-2023
New Phytologist Foundation
2022
University of Lausanne
2021
University of Geneva
2021
Institute of Biological, Environmental and Rural Sciences
2019
Purdue University West Lafayette
2006-2018
Australian National University
2003-2016
Northern Arizona University
1998-2013
Contaminated soils and waters pose a major environmental human health problem, which may be partially solved by the emerging phytoremediation technology. This cost-effective plant-based approach to remediation takes advantage of remarkable ability plants concentrate elements compounds from environment metabolize various molecules in their tissues. Toxic heavy metals organic pollutants are targets for phytoremediation. In recent years, knowledge physiological molecular mechanisms began emerge...
Phytoremediation is emerging as a potential cost-effective solution for the remediation of contaminated soils. Because contaminants such lead (Pb) have limited bioavailability in soil, means solubilizing Pb soil and facilitating its transport to shoots plants vital success phytoremediation. Indian mustard (Brassica juncea) was used demonstrate capability accumulate high tissue concentrations when grown Pb-contaminated soil. Concentrations 1.5% B. juncea were obtained from soils containing...
Abstract Uptake and translocation of cationic nutrients play essential roles in physiological processes including plant growth, nutrition, signal transduction, development. Approximately 5% the Arabidopsis genome appears to encode membrane transport proteins. These proteins are classified 46 unique families containing approximately 880 members. In addition, several hundred putative transporters have not yet been assigned families. this paper, we analyzed phylogenetic relationships over 150...
Indian mustard (Brassica juncea L.), a high biomass crop plant, accumulated substantial amounts of cadmium, with bioaccumulation coefficients (concentration Cd in dry plant tissue/concentration solution) up to 1100 shoots and 6700 roots at nonphytotoxic concentrations (0.1 [mu]g/mL) solution. This was associated rapid accumulation phytochelatins the root, where majority coordinated sulfur ligands, probably as Cd-S4 complex, demonstrated by x-ray absorption spectroscopy. In contrast, moving...
Abstract Global population increases and climate change underscore the need for better comprehension of how plants acquire process nutrients such as iron. Using cell type–specific transcriptional profiling, we identified a pericycle-specific iron deficiency response bHLH transcription factor, POPEYE (PYE), that may play an important role in this response. Functional analysis PYE suggests it positively regulates growth development under iron-deficient conditions. Chromatin...
Abstract The bioaccumulation of arsenic by plants may provide a means removing this element from contaminated soils and waters. However, to optimize process it is important understand the biological mechanisms involved. Using combination techniques, including x-ray absorption spectroscopy, we have established biochemical fate taken up Indian mustard (Brassica juncea). After arsenate uptake roots, possibly via phosphate transport mechanism, small fraction exported shoot xylem as oxyanions...
Abstract Worldwide more than 400 plant species are now known that hyperaccumulate various trace metals (Cd, Co, Cu, Mn, Ni, and Zn), metalloids (As) nonmetals (Se) in their shoots. Of these, almost one-quarter Brassicaceae family members, including numerous Thlaspi Ni up to 3% of there shoot dry weight. We observed concentrations glutathione, Cys, O-acetyl-l-serine (OAS), tissue, strongly correlated with the ability hyperaccumulators collected from serpentine soils, goesingense, T. oxyceras,...
In Cd-exposed oat (Avena sativa) roots Cd was found to be associated primarily with the phytochelatin ([gamma]-glutamylcysteinyl)3-glutamic acid [([gamma]EC)3G], a peptide ratio of 1:3 (cysteine 1:1), even though both ([gamma]EC)2G and ([gamma]EC)3G were present in roots. Phytochelatins are known accumulate vacuoles plant cells on exposure Cd, but mechanism is not clear. Here we evidence for transport phytochelatins as well complex Cd-([gamma]EC)3G across tonoplast Transport had Km, MgATP...
Abstract The ability of Thlaspi goesingense Hálácsy to hyperaccumulate Ni appears be governed by its extraordinary degree tolerance. However, the physiological basis this tolerance mechanism is unknown. We have investigated role vacuolar compartmentalization and chelation in A direct comparison contents vacuoles from leaves T. non-tolerant non-accumulator arvense L. showed that hyperaccumulator accumulates approximately 2-fold more vacuole than under exposure conditions were non-toxic both...
Abstract Indian mustard (Brassica juncea) plants exposed to Pb and EDTA in hydroponic solution were able accumulate up 55 mmol kg−1 dry shoot tissue (1.1% [w/w]). This represents a 75-fold concentration of over that solution. A threshold (0.25 mm) was found be required stimulate this dramatic accumulation both shoots. Below concentration, also accumulated shoots but at reduced rate. Direct measurement complex (Pb-EDTA) xylem exudate confirmed the majority these is transported coordination...
Using the noninvasive technique of X-ray absorption spectroscopy (XAS), we have been able to determine ligand environment Zn in different tissues Zn-hyperaccumulator Thlaspi caerulescens (J. & C. Presl.). The majority intracellular roots T. was found be coordinated with histidine. In xylem sap. transported mainly as free hydrated Zn2+ cation a smaller proportion organic acids. shoots, coordination occurred via acids, present and histidine cell wall. Our data suggest that plays an important...
Here, we describe two members of the Arabidopsis (Arabidopsis thaliana) Yellow Stripe-Like (YSL) family, AtYSL1 and AtYSL3. The YSL1 YSL3 proteins are oligopeptide transporter family predicted to be integral membrane proteins. similar maize (Zea mays) YS1 phytosiderophore (ZmYS1) AtYSL2 iron (Fe)-nicotianamine transporter, transport metal-nicotianamine complexes into cells. mRNAs expressed in both root shoot tissues, regulated response Fe status plant. Beta-glucuronidase reporter expression,...