A5075824010- Soil Carbon and Nitrogen Dynamics
- Plant Micronutrient Interactions and Effects
- Plant nutrient uptake and metabolism
- Legume Nitrogen Fixing Symbiosis
- Plant Stress Responses and Tolerance
- Clay minerals and soil interactions
- Heavy metals in environment
- Aluminum toxicity and tolerance in plants and animals
- Crop Yield and Soil Fertility
- Iron oxide chemistry and applications
- Agronomic Practices and Intercropping Systems
- Mycorrhizal Fungi and Plant Interactions
- Arsenic contamination and mitigation
- Geochemistry and Elemental Analysis
- Analytical Chemistry and Chromatography
- Plant-Microbe Interactions and Immunity
- Plant Water Relations and Carbon Dynamics
- Pesticide and Herbicide Environmental Studies
- Trace Elements in Health
- Rice Cultivation and Yield Improvement
- Coal and Its By-products
- Atmospheric and Environmental Gas Dynamics
- Photosynthetic Processes and Mechanisms
- Soil and Unsaturated Flow
- Nematode management and characterization studies
BOKU University
2016-2025
University of Vienna
2017-2019
Bangor University
2008
Summary For the first time, phytosiderophore ( PS ) release of wheat Triticum aestivum cv Tamaro) grown on a calcareous soil was repeatedly and nondestructively sampled using rhizoboxes combined with recently developed root exudate collecting tool. As in nutrient solution culture, we observed distinct diurnal rhythm; however, measured efflux c . 50 times lower than exudation from same cultivar zero iron (Fe)‐hydroponic culture. Phytosiderophore rhizosphere concentrations Tamaro were...
In wetland-adapted plants, such as rice, it is typically root apexes, sites of rapid entry for water/nutrients, where radial oxygen losses (ROLs) are highest. Nutrient/toxic metal uptake therefore largely occurs through oxidized zones and pH microgradients. However, the processes controlling acquisition trace elements in rice have been difficult to explore experimentally because a lack techniques simultaneously measuring labile O2/pH. Here, we use new diffusive gradients thin films...
Resilience of soils, i.e. their ability to maintain functions or recover after disturbance, is closely linked the root-soil interface, soil's power house. However, limited observability key processes at interface has so far our understanding how such resilience emerges. Here, we hypothesise that emerges from self-organised spatiotemporal patterns which are result complex and dynamic feedbacks between physical, chemical biological occurring in rhizosphere. We propose combination modern...
Abstract The numerous feedback loops between roots, microorganisms, soil chemical and physical properties, environmental variables result in spatial parameter patterns which are highly dynamic time. In order to improve our understanding of the related rhizosphere processes their relevance at soil–plant system scale, experimental platforms required. Those should enable (1) relate small scale observations (nm dm) behaviour, (2) integration physical, biological sampling approaches within same...
Abstract Purpose Simultaneously interacting rhizosphere processes determine emergent plant behaviour, including growth, transpiration, nutrient uptake, soil carbon storage and transformation by microorganisms. However, these occur on multiple scales, challenging modelling of behaviour. Current advances in experimental methods open the path to unravel importance interconnectedness those across scales. Methods We present a series case studies state-of-the art simulations addressing this...
Abstract Aims Root hairs are important for uptake, especially nutrients with low mobility in soils high sorption capacity. Mutants defective root expected to have lower nutrient unless they compensate more growth. Since can also contribute the plant's water uptake their importance could change over course of a growing season. It was our objective investigate role under field conditions. Methods The hair mutant rth3 Zea mays and corresponding wild-type were grown two years conditions on sand...
Deciphering root exudate composition of soil-grown plants is considered a crucial step to better understand plant-soil-microbe interactions affecting plant growth performance. In this study, two genotypes Zea mays L. (WT, rth3) differing in hair elongation were grown the field substrates (sand, loam) custom-made, perforated columns inserted into plots. Root exudates collected at different developmental stages (BBCH 14, 19, 59, 83) using soil-hydroponic-hybrid exudation sampling approach....
We have abundant knowledge on drought responses of plants or soil microorganisms individually. However, there is a severe lack regarding interactions in the plant-soil-microbiome continuum, and specifically root-soil interface traits including role root hairs. Here, we investigated how water limitation propagates system upon stopping irrigation. used two Zea mays genotypes (rth3 its isogenic wildtype B73), differing hair formation, to elucidate effect rhizosphere extension under limitation....
The flow of carbon (C) through soil is inherently complex due to the many thousands different chemical transformations occurring simultaneously within microbial community. accurate modelling this C therefore represents a major challenge. In response this, isotopic tracers (e.g. 13C, 14C) are commonly used experimentally parameterise models describing fate and residence time individual compounds soil. study, we critically evaluated combined use experimental 14C labelling mathematical estimate...
Radial O
We imaged the sub-mm distribution of labile P and pH in rhizosphere three plant species to localize zones hot spots depletion accumulation along individual root axes relate our findings nutrient acquisition / exudation strategies P-limited conditions at different soil pH, mobilization pattern other elements (Al, Fe, Ca, Mg, Mn) rhizosphere.Sub-mm distributions elemental patterns were sampled using diffusive gradients thin films analysed laser ablation inductively coupled plasma mass...
To test if multi–surface models can provide a soil-specific prediction of metal mobilization by phytosiderophores (PS) based on the characteristics individual soils. Mechanistic multi-surface chemical equilibrium modeling was applied for obtaining predictions and PS speciation upon interaction 2'-deoxymugineic acid (DMA) with 6 soils differing in availability Fe other metals. Results from were compared empirical data soil experiments. For which reached during experiment, could well predict...
Understanding phosphorus (P) dynamics in the rhizosphere is crucial for sustainable crop production. P mobilization processes include release of plant and microbially-derived protons extracellular phosphatases. We investigated effect root hairs soil texture on spatial distribution intensity mobilizing Zea mays L. root-hair defective mutant (rth3) wild-type (WT) grown two substrates (loam, sand). applied 2D-chemical imaging methods custom-designed windows installed field to visualize pH...
The functional role of organic acid anions in soil has been intensively investigated, with special focus on (i) microbial respiration and carbon dynamics, (ii) nutrient solubilization or (iii) metal detoxification reduction plant uptake. Little is known about the interaction dynamics matrix potential impact adsorption desorption processes significance these effects. aim this study was to characterize experimentally five agricultural soils differing iron aluminium oxide contents using citrate...
Phytosiderophores (PS) are natural chelating agents, exuded by graminaceous plants (grasses) for the purpose of Fe acquisition (Strategy II). They can form soluble complexes with soil-Fe that be readily taken up. PS in a diurnal pulse release, and start release "window iron uptake" opens. In present study we examined how this window is constrained time concentration biogeochemical processes. For purpose, series interaction experiments was done calcareous clay soil phytosiderophore...