Root Water Extraction under Combined Water and Osmotic Stress

2009 ◽  
Vol 73 (3) ◽  
pp. 862-875 ◽  
Author(s):  
Q. de Jong van Lier ◽  
J.C. van Dam ◽  
K. Metselaar
Keyword(s):  
Osmotic Stress ◽  
Water Extraction ◽  
Root Water Extraction

Quantifying root water extraction by rangeland plants through soil water modeling

2010 ◽  
Vol 335 (1-2) ◽  
pp. 181-198 ◽  
Author(s):  
Xuejun Dong ◽  
Bob D. Patton ◽  
Anne C. Nyren ◽  
Paul E. Nyren ◽  
Lyle D. Prunty
Keyword(s):  
Soil Water ◽  
Water Extraction ◽  
Water Modeling ◽  
Root Water Extraction ◽  
Rangeland Plants

scholarly journals Sensor placement for soil water monitoring in lemon irrigated by micro sprinkler

2007 ◽  
Vol 11 (1) ◽  
pp. 46-52 ◽  
Author(s):  
Eugênio F. Coelho ◽  
Delfran B. dos Santos ◽  
Carlos A. V. de Azevedo
Keyword(s):  
Water Potential ◽  
Water Content ◽  
Soil Water ◽  
Root Length ◽  
Sensor Placement ◽  
Soil Water Potential ◽  
Water Extraction ◽  
Soil Profiles ◽  
Water Sensor ◽  
Root Water Extraction

This research had as its objective the investigation of an alternative strategy for soil sensor placement to be used in citrus orchards irrigated by micro sprinkler. An experiment was carried out in a Tahiti lemon orchard under three irrigation intervals of 1, 2 and 3 days. Soil water potential, soil water content distribution and root water extraction were monitored by a time-domain-reflectometry (TDR) in several positions in soil profiles radial to the trees. Root length and root length density were determined from digital root images at the same positions in the soil profiles where water content was monitored. Results showed the importance of considering root water extraction in the definition of soil water sensor placement. The profile regions for soil water sensor placement should correspond to the intersection of the region containing at least 80% of total root length and the region of at least 80% of total water extraction. In case of tensiometers, the region of soil water potential above -80 kPa should be included in the intersection.

ON THE SIMULATION OF ROOT WATER EXTRACTION: EXAMINATION OF A MINIMUM ENERGY HYPOTHESIS

Soil Science ◽  
2000 ◽  
Vol 165 (3) ◽  
pp. 226-236 ◽  
Author(s):  
S. G. K. Adiku ◽  
C. W. Rose ◽  
R. D. Braddock ◽  
H. Ozier-Lafontaine
Keyword(s):  
Minimum Energy ◽  
Water Extraction ◽  
Root Water Extraction

Effects of warming, elevated CO2, and drought on root water uptake and its relation to root traits

2021 ◽  
Author(s):  
Maud Tissink ◽  
Jesse Radolinski ◽  
David Reinthaler ◽  
Erich Pötsch ◽  
Michael Bahn
Keyword(s):  
Water Uptake ◽  
Morphological Traits ◽  
Agricultural Landscape ◽  
Root Traits ◽  
Soil Surface ◽  
Root Water Uptake ◽  
Water Extraction ◽  
Ambient Conditions ◽  
Mountain Grassland ◽  
Root Water Extraction

<p>Plants can modulate the source and magnitude of water uptake under environmental stresses, ultimately constraining water and energy fluxes across Earth’s surface. These alterations are scarcely quantified for future climatic scenarios such as warming, elevated atmospheric CO<sub>2</sub> (eCO<sub>2</sub>), and droughts—all projected by the end of this century. Here we use diurnal soil moisture dynamics throughout the 2019 growing season to quantify the impacts of these three global change factors on root water uptake in a managed C<sub>3</sub> mountain grassland in Austria; a key agricultural landscape within central Europe. To determine whether plants alter water uptake via root trait adjustments, we then compared water uptake to root morphological traits. We expected that 1) drought and eCO<sub>2</sub> (+300 ppm) would reduce root water uptake relative to ambient conditions due to supply limitation and a lower stomatal conductance, whereas 2) greater vapor pressure gradients in warmed systems would elevate transpiration rates, increasing root water uptake. Plants reduced water uptake in droughted plots by ~35% regardless of other factors applied, due to decreased water extraction from the soil surface during the peak drought. Warmed plots had unexpectedly lower water uptake by 17-25% relative to control plots. Finally, vegetation in eCO<sub>2</sub> plots displayed similar water uptake to plots under ambient conditions; however, eCO<sub>2</sub> effects did buffer warming effects, such that plots with eCO<sub>2 </sub>and warming extracted less water than those subjected to warming alone. Root morphological traits showed strong linear correlations (R > 0.7, or R < -0.7) to root water uptake in ambient, drought, and eCO<sub>2</sub> plots, yet no significant relationship was found for plots under warming or multifactor treatments. Relationships were strongest and most abundant following a drought. This suggests that—though plants may optimize root structure for drought recovery—plants may alter their root systems to account for resource limitations other than water in a warming climate. Altogether, we show that warming, eCO<sub>2</sub>, and droughts may significantly alter the root water extraction in managed C<sub>3</sub> mountain grasslands, but changes in water availability alone may not fully explain plant water uptake responses.</p>

Genetic variability in sunflower cultivars under drought. II. Growth and water relations

1986 ◽  
Vol 37 (6) ◽  
pp. 583 ◽  
Author(s):  
C Gimenez ◽  
E Fereres
Keyword(s):  
Leaf Area ◽  
Carbon Balance ◽  
Genotypic Variation ◽  
Biomass Accumulation ◽  
Reproductive Period ◽  
Water Extraction ◽  
Genotypic Differences ◽  
Leaf Area Duration ◽  
Root Water Extraction ◽  
Yield Responses

Experiments were conducted between 1981 and 1983 at Cordoba, Spain, to determine the morphophysiological basis for the differences in yield responses to drought of eight sunflower genotypes. There was genotypic variation in most characters examined, particularly in maximum leaf area and in leaf area duration, biomass accumulation and distribution, and in root water extraction. Long-season genotypes had greater leaf area and produced more biomass under drought conditions, exploring the subsoil down to 270 cm. Short-season genotypes restricted water extraction to the top 180 cm of the soil profile and had about half of the leaf area duration of a long-season cultivar. Evidence is presented of small differences in osmotic adjustment among genotypes. The relations between leaf area and grain yield as well as calculations of a carbon balance for the reproductive period suggest genotypic differences in photosynthetic efficiency under drought.

scholarly journals Quantifying root water extraction after drought recovery using sub-mm in situ empirical data

2017 ◽  
Vol 424 (1-2) ◽  
pp. 73-89 ◽  
Author(s):  
Indu Dhiman ◽  
Hassina Bilheux ◽  
Keito DeCarlo ◽  
Scott L. Painter ◽  
Lou Santodonato ◽  
...  
Keyword(s):  
Empirical Data ◽  
Water Extraction ◽  
Drought Recovery ◽  
Root Water Extraction
Sign in / Sign up

Export Citation Format

Share Document