A5075154737- Plant Water Relations and Carbon Dynamics
- Irrigation Practices and Water Management
- Plant nutrient uptake and metabolism
- Soil and Unsaturated Flow
- Plant responses to water stress
- Mycorrhizal Fungi and Plant Interactions
- Tree-ring climate responses
- Plant Stress Responses and Tolerance
- Plant Pathogens and Fungal Diseases
- Polysaccharides and Plant Cell Walls
- Silicon Effects in Agriculture
- Plant Molecular Biology Research
- Soil Moisture and Remote Sensing
- Polysaccharides Composition and Applications
- Plant Pathogens and Resistance
- Yeasts and Rust Fungi Studies
- Textile materials and evaluations
- Peanut Plant Research Studies
- Nematode management and characterization studies
- Aeolian processes and effects
- Rice Cultivation and Yield Improvement
- Sugarcane Cultivation and Processing
- Legume Nitrogen Fixing Symbiosis
- Plant and Fungal Interactions Research
- Crop Yield and Soil Fertility
Technical University of Munich
2023-2025
University of Khartoum
1974-2024
University of Bayreuth
2020-2023
University of California, Davis
2023
Abstract Background and Aims Stomatal closure allows plants to promptly respond water shortage. Although the coordination between stomatal regulation, leaf xylem hydraulics has been extensively investigated, impact of below-ground on regulation remains unknown. Methods We used a novel root pressure chamber measure, during soil drying, relation transpiration rate (E) (ψleaf-x) in tomato shoots grafted onto two contrasting rootstocks, long short one. In parallel, we also measured E(ψleaf-x)...
Abstract Although the role of root hairs (RHs) in nutrient uptake is well documented, their water and drought tolerance remains controversial. Maize (Zea mays) wild-type its hair-defective mutant (Mut; roothairless 3) were grown two contrasting soil textures (sand loam). We used a pressure chamber to measure relation between transpiration rate (E) leaf xylem potential (ψleaf_x) during drying. Our hypotheses were: (1) RHs extend root–soil contact reduce ψleaf_x decline at high E dry soils;...
The fundamental question as to what triggers stomatal closure during soil drying remains contentious. Thus, we urgently need improve our understanding of response water deficits in and atmosphere. Here, investigated the role soil-plant hydraulic conductance (Ksp ) on transpiration (E) regulation. We used a root pressure chamber measure relation between E, leaf xylem potential (ψleaf-x (ψsoil tomato. Additional measurements ψleaf-x were performed with unpressurized plants. A model was...
Abstract This study investigates how amorphous silica (ASi) influences soil–plant–water interactions in distinct soil textures. A sandy loam and silty clay were mixed with 0 2% ASi, their impact on retention hydraulic conductivity curves determined. In parallel, tomato plants ( Solanum lycopersicum L.) grown experimental pots under controlled conditions. When established, the was saturated, a drying cycle ensued until reached wilting points. Soil water content, potential, plant transpiration...
Recent studies have identified soil drying as a dominant driver of transpiration reduction at the global scale. Although Arbuscular Mycorrhiza Fungi (AMF) are assumed to play pivotal role in plant response drying, investigating impact AMF on water status and soil-plant hydraulic conductance lacking. Thus, main objective this study was investigate influence tomato under drought. We hypothesized that limit drop matric potential across rhizosphere, especially soil. The underlying mechanism is...
Abstract Salinity and soil drying are expected to induce salt accumulation at the root–soil interface of transpiring plants. However, consequences this on relationship between transpiration rate (E) leaf xylem water potential (ψleaf-x) yet be quantified. Here, we used a noninvasive root pressure chamber measure E(ψleaf-x) tomato (Solanum lycopersicum L.) treated with (saline) or without 100-mM NaCl (nonsaline conditions). The results were reproduced interpreted soil–plant hydraulic model....
The role of root mucilage in facilitating water uptake during soil drying has been studied for decades. Recently, we demonstrated that slows the dissipation potential rhizosphere actively transpiring plants. While these findings provide new insights into how maintains hydraulic continuity between and roots under conditions, interaction texture remains underexplored.We used two cowpea genotypes with contrasting production, grown distinct textures (coarse fine), measured physiological...
The symbiosis with arbuscular mycorrhizal fungi (AMF) can enhance the drought resilience of associated crops, for example, by modifying belowground morphology host plants. Additionally, fungal symbionts are key drivers organic matter (OM) allocation at root-soil interface: AMF modify quantity and composition plant-derived carbon (C) inputs to soil change their fate through altered microbial processing, enhanced organo-mineral interactions, or changes in spatial arrangements. However, effects...
Carbon-water trade-offs in plants are adjusted through stomatal regulation. Stomatal opening enables carbon uptake and plant growth, whereas circumvent drought by closing stomata. The specific effects of leaf position age on behavior remain largely unknown, especially under edaphic atmospheric drought. Here, we compared conductance ( g s ) across the canopy tomato during soil drying. We measured gas exchange, foliage ABA level soil-plant hydraulics increasing vapor pressure deficit VPD )....
Stomatal regulation, which governs water loss and hence plant use, is a key feature facilitating adaptation to water-limited environments. Nevertheless, the underlying mechanisms governing stomatal closure remain disputed. Recent studies proposed that in hydraulic conductivities within soil-plant system main driver of closure. However, primary constraint along system, being soil and/or plant, remains without consensus. Furthermore, simultaneous measurements limitation especially intact...
Abstract Background and Aims Mucilage has been hypothesized to soften the gradients in matric potential at root-soil interface, hereby facilitating root water uptake dry soils maintaining transpiration with a moderate decline leaf potential. So far, this hypothesis tested only through simplified experiments numerical simulations. However, impact of mucilage on relationship between rate (E) (ψleaf) plant scale remains speculative. Methods We utilized an automated pressure chamber measure...
The rhizosphere is one of the major components in soil–plant–atmosphere continuum which controls flow water from soil into roots. Plant roots release mucilage capable altering physio-chemical properties this region. Here, we showed how impacted on hydraulic properties, using simple experiments. An artificial rhizosphere, treated or not with mucilage, was placed a sample and suction applied to mimic negative pressure plant xylem. measured contents matric potential were coupled numerical...
Various rhizosphere traits have been explored as plant adaptations to modulate the soil-root interface acquire resources and enhance water status under stress conditions. Mucilage exudation has suggested enable uptake during soil drying. This hypothesis was tested using artificial root analogy due technical limitations lack of suitable materials. Here, we whether mucilage facilitates in intact cowpeas (Vigna unguiculata L.) plants growing loamy We used a pressure chamber system measure...
Transpiration response of plants during both soil drying and increasing vapor pressure deficit (VPD) have been thoroughly studied separately. However, the interactive effects on soil-plant hydraulics remain largely unknown. In this study, we tested combined atmospheric sorghum.Sorghum were grown in sandy under well-watered conditions with a daily VPD increment, five steps from 0.5 to 3.7 kPa. After 30 days, was dried over days. We measured transpiration rate (E), water content (θ),...
As the soil dries, its water potential and hydraulic conductivity decrease significantly, resulting in reduced leaf stomatal closure. Several recent studies have proposed that adding amorphous silica (ASi) to coarse textured soils (sandy soils) can improve soil-plant-water relationships by increasing holding capacity of soil. This is due high surface area, adsorption potential, internal porosity ASi particles. study aimed investigate impact on two with contrasting textures. Tomato plants...
<p>Stomatal closure allows plants to promptly respond water shortage. Although the coordination between stomatal regulation, leaf and xylem hydraulics has been extensively investigated, impact of below-ground on regulation remains unknown.</p><p>We used a novel root pressure chamber measure, during soil drying, relation transpiration rate (<em>E</em>)...