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Quantification and Modeling of Local Root Water Uptake Using Neutron Radiography and Deuterated Water
Knowledge of local water fluxes across the soil–root interface is essential to understand and model root water uptake. Despite its importance, there is a lack of direct methods to measure theExpand
Nitrogen fertilization raises CO2 efflux from inorganic carbon: A global assessment
The problem of acidification of carbonate-containing soils is raised and the necessity of preventing soil acidification in N-fertilized soils as an effective strategy to inhibit millennia of CO2 efflux to the atmosphere is emphasized. Expand
Mucilage exudation facilitates root water uptake in dry soils.
Mucilage exudation seems to be an optimal plant trait that favours the capture of water when water is scarce, and when mucilage is added to the root surface, it keeps the soil near the roots wet and hydraulically well conductive, facilitating the water flow from dry soils towards theroot surface. Expand
Where do roots take up water? Neutron radiography of water flow into the roots of transpiring plants growing in soil.
Where and how fast does water flow from soil into roots? The answer to this question requires direct and in situ measurement of local flow of water into roots of transpiring plants growing in soil.Expand
Nonequilibrium water dynamics in the rhizosphere: How mucilage affects water flow in soils
The flow of water from soil to plant roots is controlled by the properties of the narrow region of soil close to the roots, the rhizosphere. In particular, the hydraulic properties of the rhizosphereExpand
Visualization of Root Water Uptake: Quantification of Deuterated Water Transport in Roots Using Neutron Radiography and Numerical Modeling[C]
A new method to noninvasively quantify water fluxes in roots by introducing a convection-diffusion model to simulate the D2O transport in roots and allowing the quantification of the root properties and the regions of root water uptake along the root systems. Expand
Biophysical rhizosphere processes affecting root water uptake.
A general understanding of how the rhizosphere affects root water uptake is still lacking and the missing elements of the puzzle are the gradient in water potential around roots and measurements of the xylem water potential at varying soil water potentials and transpiration rates supported by numerical models ofRoot water uptake. Expand
Degradation of Tibetan grasslands: consequences for carbon and nutrient cycles.
Abstract The Tibetan Plateau hosts the world’s largest alpine pastoral ecosystems, dominated by the endemic sedges Kobresia pygmaea and Kobresia humilis. Owing to the very harsh environment and alsoExpand
Root hairs increase rhizosphere extension and carbon input to soil
Root hairs increase exudation and spatial rhizosphere extension, which probably enhance rhizospheric interactions and nutrient cycling in larger soil volumes and may therefore be beneficial to plants under nutrient-limiting conditions. Expand
Root hairs enable high transpiration rates in drying soils.
It is concluded that root hairs facilitate the uptake of water by substantially reducing the drop in matric potential at the interface between root and soil in rapidly transpiring plants. Expand