A5001654643- Soil and Water Nutrient Dynamics
- Soil Carbon and Nitrogen Dynamics
- Phytase and its Applications
- Phosphorus and nutrient management
- Plant Micronutrient Interactions and Effects
- Plant nutrient uptake and metabolism
- Legume Nitrogen Fixing Symbiosis
- Folate and B Vitamins Research
- Agronomic Practices and Intercropping Systems
- Clay minerals and soil interactions
- Coastal wetland ecosystem dynamics
- Agricultural Science and Fertilization
- Soil Geostatistics and Mapping
- Soil and Unsaturated Flow
- Enzyme Production and Characterization
- Soil erosion and sediment transport
- Aquatic Ecosystems and Phytoplankton Dynamics
- Pesticide and Herbicide Environmental Studies
- Iron Metabolism and Disorders
- Agroforestry and silvopastoral systems
- Fire effects on ecosystems
- Mine drainage and remediation techniques
- Forest ecology and management
- Bioenergy crop production and management
- NMR spectroscopy and applications
Australian Wine Research Institute
2015-2024
The University of Adelaide
2015-2024
Chemical characterization of soil organic P using 31 nuclear magnetic resonance (NMR) spectroscopy relies on the correct assignment resonances. We examined eight Australian soils and identified main orthophosphate monoester peaks by spiking model compounds (α‐ β‐glycerophosphate, ethanolamine phosphate, phytate, scyllo‐inositol hexakisphosphate, choline phosphate) into NaOH–ethylenediaminetetraacetic acid (EDTA) extracts. For five soils, strongest resonances were as being due to while for...
Phosphorus (P) is an essential element for life, innate constituent of soil organic matter, and a major anthropogenic input to terrestrial ecosystems. The supply P living organisms strongly dependent on the dynamics P. However, fluxes through matter remain unclear because only minority (typically <30%) has been identified as recognizable biomolecules low molecular weight (e.g., inositol hexakisphosphates). Here, we use (31)P nuclear magnetic resonance spectroscopy determine speciation in...
myo ‐Inositol hexakisphosphate (phytate) is widely regarded as an abundant form of soil organic phosphorus (P) in many soils. Its abundance believed to be because its resistance microbial degradation. We examined the fate phytate added a calcareous solution at concentration 58 mg P kg −1 , with and without addition wheat straw. The was incubated for 13 weeks, concentrations determined 0, 1, 4, 7 weeks using NaOH‐EDTA extraction followed by 31 nuclear magnetic resonance (NMR) spectroscopy....
Solution 31P nuclear magnetic resonance (NMR) spectroscopy is the most common technique for detailed characterisation of soil organic P, but yet to be applied widely Australian soils. We investigated composition P in 18 diverse soils using this technique. Soils were treated with a mixture sodium hydroxide–ethylenediaminetetra-acetic acid (NaOH-EDTA), which resulted extraction up 89% total P. It was possible identify 15 well-resolved resonances and one broad signal each NMR spectrum. The...
Abstract Hundreds of Proteaceae species in Australia and South Africa typically grow on phosphorus (P)‐impoverished soils, exhibiting a carboxylate‐releasing P‐mobilizing strategy. In the Southwest Australian Biodiversity Hotspot, two Xylomelum (Proteaceae) are widely distributed, but restricted within that distribution. We grew occidentale hydroponics at 1 μM P. Leaves, seeds, rhizosheath bulk soil were collected natural habitats. did not produce functional cluster roots occupied soils...
Ribonucleic acid (RNA) is the most abundant form of organic phosphorus (P) in plant and microbial biomass therefore expected to be present materials such as soils, sediments, composts, manures. Phosphorus-31 nuclear magnetic resonance (31P NMR) spectroscopy increasingly used characterize P these materials, usually following extraction into a mixture sodium hydroxide ethylenediaminetetraacetic (NaOH-EDTA). Under alkaline conditions, RNA hydrolysed, providing distinctive pattern or...
Few studies have considered the influence of climate on organic phosphorus (P) speciation in soils. We used sodium hydroxide–ethylenediaminetetra-acetic acid (NaOH–EDTA) soil extractions and solution 31P nuclear magnetic resonance spectroscopy to investigate P composition five alpine sub-alpine The aim was compare this set soils with those typically reported literature from other cold wet locations, as well Australian warmer drier environments. For all soils, majority detected an form...
Deep ultraviolet Raman microspectroscopy was successfully investigated as a new approach to analyze the chemical state of phosphorus compounds directly in soil. We demonstrate that excitation has advantage avoid interference with strong fluorescence, which occurs visible spectral range caused by organic matter soils. Furthermore, spatial resolution <1 μm 2 enables detection very small particles. For some (β‐glycerophosphate, aminomethylphosphonic acid), sample cooling −100 °C is found...
Background and Aims The phosphorus (P) contained in annual prunings can represent a substantial proportion of vineyard P addition. Availability to the growing vines is controlled by forms present. Solution 31P nuclear magnetic resonance spectroscopy was used investigate chemical composition dormant canes taken from two cultivars Vitis vinifera L., Shiraz Viognier, collected nine vineyards. Methods Results main detected were similar, although these varied; orthophosphate comprised 37–57%...
Crops with improved uptake of fertilizer phosphorus (P) would reduce P losses and confer environmental benefits. We examined how P-sufficient 6-week-old soil-grown Trifolium subterraneum plants, 2-week-old seedlings in solution culture, accumulated roots after inorganic (Pi) addition. In contrast to our expectation that vacuoles accumulate excess P, 7 days, X-ray microanalysis showed vacuolar [P] remained low (<12 mmol kg-1 ). However, the plants addition, some cortex cells contained...
Phosphorus (P) availability, which depends on both P concentration and speciation, often controls primary productivity algal-bloom formation in river systems. The pool is also connected to pools of adjacent sediments, soils vegetation. Thus, informed management floodplain–river systems requires detailed understanding speciation all these interconnected components. We studied sediments water, floodplain red gum (Eucalyptus camaldulensis) leaf litter from the Lower Murray region using...