Water uptake and transport of soybeans as a function of rooting patterns

AbstractRoot water uptake is an essential process for terrestrial plants that strongly affects the spatiotemporal distribution of water in vegetated soil. Fast neutron tomography is a recently established non-invasive imaging technique capable to capture the 3D architecture of root systems in situ and even allows for tracking of three-dimensional water flow in soil and roots. We present an in vivo analysis of local water uptake and transport by roots of soil-grown maize plants—for the first time measured in a three-dimensional time-resolved manner. Using deuterated water as tracer in infiltration experiments, we visualized soil imbibition, local root uptake, and tracked the transport of deuterated water throughout the fibrous root system for a day and night situation. This revealed significant differences in water transport between different root types. The primary root was the preferred water transport path in the 13-days-old plants while seminal roots of comparable size and length contributed little to plant water supply. The results underline the unique potential of fast neutron tomography to provide time-resolved 3D in vivo information on the water uptake and transport dynamics of plant root systems, thus contributing to a better understanding of the complex interactions of plant, soil and water.

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Water Uptake and Transport Properties of La1−xCaxScO3−α Proton-Conducting Oxides

Materials ◽

10.3390/ma12142219 ◽

2019 ◽

Vol 12 (14) ◽

pp. 2219 ◽

Cited By ~ 7

Author(s):

Alyona Lesnichyova ◽

Anna Stroeva ◽

Semyon Belyakov ◽

Andrey Farlenkov ◽

Nikita Shevyrev ◽

...

Keyword(s):

Transport Properties ◽

Water Uptake ◽

Single Phase ◽

Calcium Content ◽

Combustion Method ◽

Oxide Materials ◽

Conducting Oxides ◽

Different Temperatures ◽

Uptake And Transport ◽

Uptake And Release

In this study, oxide materials La1−xCaxScO3−α (x = 0.03, 0.05 and 0.10) were synthesized by the citric-nitrate combustion method. Single-phase solid solutions were obtained in the case of calcium content x = 0.03 and 0.05, whereas a calcium-enriched impurity phase was found at x = 0.10. Water uptake and release were studied by means of thermogravimetric analysis, thermodesorption spectroscopy and dilatometry. It was shown that lower calcium content in the main phase leads to a decrease in the water uptake. Conductivity was measured by four-probe direct current (DC) and two-probe ascension current (AC) methods at different temperatures, pO2 and pH2O. The effects of phase composition, microstructure and defect structure on electrical conductivity, as well as correlation between conductivity and water uptake experiments, were discussed. The contribution of ionic conductivity of La1−xCaxScO3−α rises with decreasing temperature and increasing humidity. The domination of proton conductivity at temperatures below 500 °C under oxidizing and reducing atmospheres is exhibited. Water uptake and release as well as transport properties of La1−xCaxScO3−α are compared with the properties of similar proton electrolytes, La1−xSrxScO3−α, and the possible reasons for their differences were discussed.

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Linking water uptake with rooting patterns in grassland species

Oecologia ◽

10.1007/s00442-007-0745-8 ◽

2007 ◽

Vol 153 (2) ◽

pp. 261-272 ◽

Cited By ~ 120

Author(s):

Jesse B. Nippert ◽

Alan K. Knapp

Keyword(s):

Water Uptake ◽

Grassland Species ◽

Rooting Patterns

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Tree/pasture interactions at a range of tree densities in an agroforestry experiment. II. Water uptake in relation to rooting patterns

Australian Journal of Agricultural Research ◽

10.1071/ar9900697 ◽

1990 ◽

Vol 41 (4) ◽

pp. 697 ◽

Cited By ~ 13

Author(s):

J Eastham ◽

CW Rose ◽

DM Cameron ◽

SJ Rance ◽

T Talsma ◽

...

Keyword(s):

Soil Water ◽

Water Uptake ◽

Unit Root ◽

Evaporation Rate ◽

Surface Soil ◽

Tree Density ◽

Soil Horizons ◽

Rooting Patterns ◽

Water Contents ◽

Soil Water Contents

Patterns of water uptake throughout a drying period of approximately one year were investigated under trees and pasture at three tree densities in an agroforestry experiment, and related to tree and pasture rooting patterns and water use. A greater proportion of soil water was extracted from deep in the soil profile under the densely planted trees, owing to lower soil water contents in upper horizons and deeper and more dense rooting systems than at lower tree densities. As the drought period progressed, the ratios of tree transpiration rate and pasture evaporation rate to equilibrium evaporation rate tended to decrease at each tree density as soil water contents in upper horizons decreased, and an increasing proportion of water was extracted from deeper soil horizons. At each tree density, the rate of water uptake per unit root length was lowest in surface soil horizons and tended to increase with increasing soil depth. The rate of water uptake per unit root length tended to increase with time in deeper, wetter soil horizons and decrease with time in surface soil horizons as soil water content decreased.

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