A5074950925- Mycorrhizal Fungi and Plant Interactions
- Forest Ecology and Biodiversity Studies
- Soil Carbon and Nitrogen Dynamics
- Plant nutrient uptake and metabolism
- Botany and Plant Ecology Studies
- Plant Water Relations and Carbon Dynamics
- Legume Nitrogen Fixing Symbiosis
- Radioactive contamination and transfer
- Lichen and fungal ecology
- Radioactive element chemistry and processing
- Peatlands and Wetlands Ecology
- Microbial Metabolites in Food Biotechnology
- Gut microbiota and health
- Microbial Community Ecology and Physiology
- Crop Yield and Soil Fertility
- Plant biochemistry and biosynthesis
- Plant-Microbe Interactions and Immunity
- Tree-ring climate responses
- Horticultural and Viticultural Research
- Genomics and Phylogenetic Studies
- Probiotics and Fermented Foods
- Fungal Biology and Applications
- Plant responses to water stress
- Ecology and Vegetation Dynamics Studies
- Clay minerals and soil interactions
University of Vienna
2018-2024
Terrestrial Ecosystem Research Network
2023
Non-structural carbohydrates (NSCs), the stored products of photosynthesis, building blocks for growth and fuel respiration, are central to plant metabolism, but their measurement is challenging. Differences in methods procedures among laboratories can cause results vary widely, limiting our ability integrate generalize patterns carbon balance studies. A recent assessment found that NSC concentrations measured a common set samples by an order magnitude, sources this variability were unclear....
Plant roots release recent photosynthates into the rhizosphere, accelerating decomposition of organic matter by saprotrophic soil microbes ('rhizosphere priming effect') which consequently increases nutrient availability for plants. However, about 90% all higher plant species are mycorrhizal, transferring a significant fraction their directly to fungal partners. Whether mycorrhizal fungi pass on plant-derived carbon (C) bacteria in root-distant areas, i.e. incite 'hyphosphere effect', is not...
Prebiotics are defined as non-digestible dietary components that promote the growth of beneficial gut microorganisms. In many cases, however, this capability is not systematically evaluated. Here, we develop a methodology for determining prebiotic-responsive bacteria using popular supplement inulin. We first identify microbes with capacity to bind inulin mesoporous silica nanoparticles functionalized 16S rRNA gene amplicon sequencing sorted cells revealed ability was widespread in...
Root exudation increases the concentration of readily available carbon (C) compounds in its immediate environment. This creates 'hotspots' microbial activity characterized by accelerated soil organic matter turnover with direct implications for nutrient availability plants. However, our knowledge metabolic processes occurring vicinity roots during and after a root event is still limited. Using reverse microdialysis, we simulated releasing a13C-labelled mix low-molecular-weight C at mm-sized...
Ectomycorrhizal plants trade plant-assimilated carbon for soil nutrients with their fungal partners. The underlying mechanisms, however, are not fully understood. Here we investigate the exchange of nitrogen in ectomycorrhizal symbiosis Fagus sylvatica across different spatial scales from root system to cellular level. We provided 15 N-labelled mycorrhizal hyphae associated one half young beech trees, while exposing a 13 CO2 atmosphere. analysed short-term distribution C and N isotope-ratio...
Plant roots release a variety of low-molecular weight compounds, such as sugars, amino acids or organic into the soil, impacting microbial activities and physico-chemical soil processes in their surroundings. These compounds are source easily available Carbon (C) energy for microbes, potentially accelerating decomposition matter immediate vicinity roots. However, knowledge about root exudation hotspots remains limited due to experimental difficulties investigating soil. Microdialysis,...
Abstract Ectomycorrhizal fungi live in close association with their host plants and form complex interactions bacterial/archaeal communities soil. We investigated whether abundant or rare ectomycorrhizal on root-tips of young beech trees ( Fagus sylvatica ) shape communities. sequenced 16S rRNA genes fungal internal transcribed spacer regions individual used ecological networks to detect the tendency certain assemblies taxa inhabit same root-tip (i.e. modularity). Individual hosted distinct...
Trees allocate C from sources to sinks by way of a series processes involving carbohydrate transport and utilization. Yet these dynamics are not well characterized in trees, it is unclear how will respond warmer world. Here, we conducted warming pulse-chase experiment on Eucalyptus parramattensis growing whole-tree chamber system test whether impacts carbon allocation increasing the speed dynamics. We pulse-labelled large (6-m tall) trees with 13 C-CO2 follow recently fixed through different...
Abstract Prebiotics are defined as non-digestible dietary components that promote the growth of beneficial gut microorganisms. In many cases, however, this capability is not systematically evaluated. Here, we develop a methodology for determining prebiotic-responsive bacteria using popular supplement inulin. We first identify microbes with capacity to bind inulin mesoporous silica nanoparticles functionalized 16S rRNA gene amplicon sequencing sorted cells revealed ability was widespread in...
Many agroecosystems face nitrogen (N), phosphorus (P) or potassium (K) deficiencies due to imbalanced insufficient nutrient replenishment after plant biomass harvest. How this affects the symbiosis between plants and arbuscular mycorrhizal fungi (AMF), abundance of exploration-based AMF guilds (i.e., rhizophilic, edaphophilic, ancestral) remains largely unknown. We studied a 70-year nutrient-deficiency experiment in managed grassland central Austria, where aboveground was harvested three...
Sugars and organic acids, primary components in plant root exudates, are thought to enhance microbial decomposition of matter the rhizosphere. However, their specific impacts on activity nutrient mobilisation remain poorly understood. Here, we simulated passive exudation investigate distinct effects sugars acids metabolism We released 13C-labelled and/or via reverse microdialysis into intact meadow forest soils over 6-hours. measured substrate-induced respiration, soil mineralization,...
Arbuscular mycorrhizal fungi (AMF) form mutualistic associations with roughly 70% of vascular plant species, supporting the nutrient acquisition their host plants and deriving carbon in return. AMF communities are linked to each other by host-specificity ecological selection favorable trading strategies. Changing soil availabilities can affect both directly also indirectly via response partners.  We aimed elucidate combined (belowground) (aboveground) community compositions changing...
<p>Mycorrhizal fungi are an important partner of almost all land plants, who trade soil nutrients, such as Phosphorus or Nitrogen, for photosynthetic Carbon (C). Moreover, mycorrhizal connect multiple plants with their mycelium in so called Common Mycorrhizal Networks (CMNs). CMNs formed by ectomycorrhizal (EM) inherent part boreal and temperate forests, often termed the ‘wood-wide web’. However, role these networks plant belowground C allocation...