A5000563634- Plant Micronutrient Interactions and Effects
- Aluminum toxicity and tolerance in plants and animals
- Soil Carbon and Nitrogen Dynamics
- Heavy metals in environment
- Plant Stress Responses and Tolerance
- Clay minerals and soil interactions
- Soil and Water Nutrient Dynamics
- Soil and Unsaturated Flow
- Coal and Its By-products
- Nanoparticles: synthesis and applications
- Heavy Metals in Plants
- Agricultural Science and Fertilization
- Geochemistry and Elemental Analysis
- Phosphorus and nutrient management
- Peatlands and Wetlands Ecology
- Silicon Effects in Agriculture
- Plant nutrient uptake and metabolism
- Heavy Metal Exposure and Toxicity
- Arsenic contamination and mitigation
- Fluoride Effects and Removal
- Mine drainage and remediation techniques
- Graphene and Nanomaterials Applications
- Crop Yield and Soil Fertility
- Soil Geostatistics and Mapping
- Iron oxide chemistry and applications
The University of Queensland
2016-2025
Agriculture and Food
2016-2025
Indian Institute of Technology Delhi
2024
ORCID
2021
In-Q-Tel
2019
Brisbane School of Theology
2016
Australian Synchrotron
2011-2014
The University of Adelaide
2014
Cooperative Research Centre for Contamination Assessment and Remediation of the Environment
2011-2013
CRC CARE
2011-2012
The preharvest drainage of rice paddy fields during the grain filling stage can result in a substantial mobilization Cd soil and, consequently, elevated concentration. However, processes controlling remains poorly understood. Using 12 field-contaminated soils, we investigated factors temporal changes solubility soils that were incubated anaerobically for 40 d followed by 20 oxidation period. Soluble and extractable concentrations decreased rapidly upon flooding but increased phase, with...
The increasing use of zinc oxide nanoparticles (ZnO-NPs) in various commercial products is prompting detailed investigation regarding the fate these materials environment. There is, however, a lack information comparing transformation ZnO-NPs with soluble Zn(2+) both soils and plants. Synchrotron-based techniques were used to examine uptake Zn tissues cowpea ( Vigna unguiculata (L.) Walp.) exposed or ZnCl2 following growth either solution soil culture. In culture, (ZnCl2) was more toxic than...
Despite the rhizotoxicity of aluminum (Al) being identified over 100 years ago, there is still no consensus regarding mechanisms whereby root elongation rate initially reduced in approximately 40% arable soils worldwide that are acidic. We used high-resolution kinematic analyses, molecular biology, rheology, and advanced imaging techniques to examine soybean (Glycine max) roots exposed Al. Using this multidisciplinary approach, we have conclusively shown primary lesion Al apoplastic. In...
Nanomaterials can potentially be used as fertilizers to improve both plant nutrition and environmental outcomes.
Abstract Understanding the cycling of C and N in soils is important for maintaining soil fertility while also decreasing greenhouse gas emissions, but much remains unknown about how organic matter ( OM ) stabilized soils. We used nano‐scale secondary ion mass spectrometry (Nano SIMS to investigate changes a Vertisol an Alfisol incubated 365 days with 13 15 pulse labeled lucerne Medicago sativa L.) discriminate new inputs from existing . found that almost all within free stable...
Not only do soils provide 98.7% of the calories consumed by humans, they also numerous other functions upon which planetary survivability closely depends. However, our continuously increasing focus on for biomass provision (food, fiber, and energy) through intensive agriculture is rapidly degrading diminishing their capacity to deliver vital functions. These tradeoffs in soil functionality – increased one function at expense critical are this review. We examine how land-use change has...
The soil carbon (C) saturation concept suggests an upper limit to the storage of organic (SOC). It is set by mechanisms that protect matter from mineralization. Biochar has capacity new C, including rhizodeposits and microbial necromass. However, decadal-scale which biochar influences molecular diversity, spatial heterogeneity, temporal changes in SOC persistence, remain unresolved. Here we show C ceiling a Ferralsol under subtropical pasture was raised second application Eucalyptus saligna...
Abstract The phytotoxicity of trace metals is global concern due to contamination the landscape by human activities. Using synchrotron-based x-ray fluorescence microscopy and absorption spectroscopy, distribution speciation copper (Cu), nickel (Ni), zinc (Zn) was examined in situ using hydrated roots cowpea (Vigna unguiculata) exposed 1.5 μm Cu, 5 Ni, or 40 Zn for 1 24 h. After h exposure, most Cu bound polygalacturonic acid rhizodermis outer cortex, suggesting that binding walls cells...
The effects of foliar-applied ZnO nanoparticles (ZnO NPs) and ZnSO4 on the winter wheat ( Triticum aestivum L.) grain yield quality were studied under field conditions, with distribution speciation Zn within examined using synchrotron-based X-ray fluorescence microscopy absorption spectroscopy. Although neither two compounds improved or quality, both increased concentration (average increments 5 10 mg/kg for NP treatments, respectively). Across all this was mainly located aleurone layer...
Plants take up Ag<sub>2</sub>S-NPs without a marked selectivity in regard to particle size and substantial transformation during upward translocation.
Foliar application of zinc (Zn) to crops is an effective way increase the grain concentration Zn. However, development more efficient foliar Zn fertilizers limited by a lack knowledge regarding distribution, mobility, and speciation in leaves once it taken up plant. We performed experiment using radiolabelled (65Zn), situ time-resolved elemental imaging synchrotron X-ray fluorescence microscopy (XFM), investigate behaviour two commonly used (Zn sulphate ZnEDTA) wheat (Triticum aestivum)...
The pathways whereby foliar-applied nutrients move across the leaf surface remain unclear. aim of present study was to examine by which Zn moves sunflower (Helianthus annuus) surface, considering potential importance cuticle, stomata and trichomes.Using synchrotron-based X-ray florescence microscopy nanoscale secondary ion mass spectrometry (NanoSIMS), absorption ZnSO4 nano-ZnO were studied in sunflower. speciation also examined using spectroscopy.Non-glandular trichomes (NGTs) particularly...
The use of biochar can contribute to carbon (C) storage in soil. Upon addition biochar, there is a spatial reorganization C within soil particles, but the mechanisms remain unclear. Here, we used Fourier transformed infrared-microscopy and confocal laser scanning microscopy examine this reorganization. A silty-loam was amended with three different organic residues produced from these incubated for 237 d. Soil respiration lower biochar-amended soils than residue-amended soils. Fluorescence...