Seasonal water uptake and movement in root systems of Australian phraeatophytic plants of dimorphic root morphology: a stable isotope investigation

Oecologia ◽  
1996 ◽  
Vol 107 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Todd E. Dawson ◽  
John S Pate
Keyword(s):  
Stable Isotope ◽  
Water Uptake ◽  
Root Morphology ◽  
Root Systems

Effects of Temperature on Root Morphology and Ectendomycorrhizal Development in Pinusresinosa Ait.

1975 ◽  
Vol 5 (2) ◽  
pp. 171-175 ◽  
Author(s):  
Hugh E. Wilcox ◽  
Ruth Ganmore-Neumann
Keyword(s):  
Root Growth ◽  
Root System ◽  
Root Morphology ◽  
Root Systems ◽  
Second Order ◽  
Root Temperature ◽  
First Order ◽  
Effects Of Temperature

Seedlings of Pinusresinosa were grown at root temperatures of 16, 21 and 27 °C, both aseptically and after inoculation with the ectendomycorrhizal fungus BDG-58. Growth after 3 months was significantly influenced by the presence of the fungus at all 3 temperatures. The influence of the fungus on root growth was obscured by the effects of root temperature on morphology. The root system at 16 and at 21 °C possessed many first-order laterals with numerous, well developed second-order branches, but those at 27 °C had only a few, relatively long, unbranched first-order laterals. Although the root systems of infected seedlings were larger, the fungus increased root growth in the same pattern as determined by the temperature.

scholarly journals Planting Depth Affects Root Form of Three Shade Tree Cultivars in Containers

2010 ◽  
Vol 36 (3) ◽  
pp. 132-139
Author(s):  
Edward Gilman ◽  
Chris Harchick ◽  
Maria Paz
Keyword(s):  
Root Morphology ◽  
Adventitious Root ◽  
Substrate Surface ◽  
Root Systems ◽  
Planting Depth ◽  
Trunk Diameter ◽  
Shade Tree ◽  
Container Wall ◽  
Stem Girdling

Study was designed to evaluate impact of planting depth on root morphology inside nursery containers. Trees were planted shallow (13 mm) or deep (64 mm) into #3 Air-Pot™ containers, then shallow (0 mm) or deep (64 mm) into #15 containers prior to shifting them to their final #45 container size at the same depth. Trunk diameter (caliper) was significantly larger for both magnolia and maple planted shallow (13 mm) into #3, and then shallow into #15 containers when compared to planting deeper. However, differences were small and may not be relevant to a grower. No caliper or height differences among planting depths were found for elm. Presence of stem girdling roots in elm and magnolia growing in #45 containers increased with planting depth into # 3 containers. Downward re-orientation of main roots comprising the flare by #3 container wall, likely contributed to amount of roots growing over root flare. Maple root systems were not impacted by planting depth into #3 primarily due to adventitious root emergence from the buried portion of stem. Distance between substrate surface and top of root flare in finished #45 containers was not impacted by planting depth into #3 containers for any species. Planting elm and maple deeply into #15 led to more trunk-girdling by roots, a deeper root flare, and more roots growing over flare compared to planting shallow. Most root defects in all species were hidden from view because they were found below substrate surface. Presence of a visible root flare was not related to occurrence of root defects. Root balls on elm and maple were packed with roots which made it time consuming to remove substrate and roots above the root flare. Planting depth appears most crucial when shifting into #15 containers.

scholarly journals Image analysis techniques to characterise white clover root morphology

1998 ◽  
pp. 187-191
Author(s):  
Debbie Care ◽  
Shirley Nichols ◽  
Derek Woodfield
Keyword(s):  
Image Analysis ◽  
White Clover ◽  
Root Morphology ◽  
Root Systems ◽  
Solution Culture ◽  
Two Dimensions ◽  
Three Dimensions ◽  
Analysis Techniques ◽  
Clover Root ◽  
Image Analysis Techniques

The use of low-ionic-strength hydroponic culture and image analysis techniques to discriminate and isolate morphologically distinct, genetically differentiated root types within white clover is described. Advantages of this method include the ability to view the genetic expression of the root systems without the modifying effects of growth in soil, to examine the growth and structure of roots over time, and to store the images for further examination. It is recognised that although the root systems grow in three dimensions, they are constrained to two dimensions by the flatbed scanner. However, the morphological parameters determined by image analysis would not be altered whether this analysis was measured in two or three dimensions. Keywords: image analysis, root morphology, solution culture, Trifolium repens

scholarly journals Water uptake by cotton root systems: an examination of assumptions in the single root model

1974 ◽  
Author(s):  
H.M. Taylor ◽  
B. Klepper
Keyword(s):  
Water Uptake ◽  
Root Systems ◽  
Single Root ◽  
Cotton Root ◽  
Root Model

Water uptake by plants: perspectives from stable isotope composition

1992 ◽  
Vol 15 (9) ◽  
pp. 1073-1082 ◽  
Author(s):  
J. R. EHLERINGER ◽  
T. E. DAWSON
Keyword(s):  
Stable Isotope ◽  
Water Uptake ◽  
Isotope Composition ◽  
Stable Isotope Composition

Water drawdown by radish (Raphanus sativus L.) multiple-root systems evaluated using computed tomography

Soil Research ◽  
2008 ◽  
Vol 46 (3) ◽  
pp. 228
Author(s):  
M. A. Hamza ◽  
S. H. Anderson ◽  
L. A. G. Aylmore
Keyword(s):  
Computed Tomography ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Water Uptake ◽  
Root Zone ◽  
Multiple Root ◽  
Root Systems ◽  
Bulk Soil ◽  
Water Drawdown

Although measurements of water drawdown by single radish root systems have been previously published by the authors, further research is needed to evaluate water drawdown patterns in multiple-root systems. The objective of this study was to compare water transpiration patterns estimated using X-ray computed tomography (CT) with the traditional gravimetric method and to evaluate the effects of variably spaced multiple root systems on soil water content and corresponding water content gradients. Water drawdown showed a dual pattern in which it increased rapidly when soil water content was high at the beginning of transpiration, then slowed down to an almost constant level with time as water content decreased. These results contrast with the single-root system wherein transpiration rates initially increased rapidly and then slowly increased with time. Water uptake estimated using the CT method was observed to be 27–38% lower than the gravimetrically estimated water uptake; this difference was attributed to lower water uptake for the upper 30 mm layer (CT measured) than lower layers due to differences in root density. However, good correlation (r = 0.97) was found between both measurement methods. The drawdown patterns for multiple root systems showed a convex shape from the root surface to the bulk soil, compared with a nearly linear shape for single roots. The water content drawdown areas and the drawdown distances for multiple root systems were found to be much larger than those corresponding to single radish roots. Differential water content gradients were observed for roots spaced at 15-mm distances compared with 3–4-mm distances. These differential gradients from the bulk soil towards the root-zone occurred probably creating localised water potential gradients within the root-zone, which moved water from between roots to root surfaces. The lowest water content values were located in the inter-root areas. The CT-scanned layer probably acted as one drawdown area with particularly higher water drawdown from the inter-root areas.

Study on the depth of water uptake byPopulus euphraticatrees of different ages in the lower reaches of the Heihe River, based on the stable isotope techniques

2016 ◽  
Vol 36 (3) ◽  
Author(s):  
刘树宝 LIU Shubao ◽  
陈亚宁 CHEN Yaning ◽  
陈亚鹏 CHEN Yapeng ◽  
邓海军 DENG Haijun ◽  
方功焕 FANG Gonghuan
Keyword(s):  
Stable Isotope ◽  
Water Uptake ◽  
Heihe River ◽  
Isotope Techniques ◽  
Different Ages

Cryogenic vacuum artifacts do not affect plant water-uptake studies using stable isotope analysis

Ecohydrology ◽  
2017 ◽  
Vol 10 (8) ◽  
pp. e1892 ◽  
Author(s):  
S.L. Newberry ◽  
D.B. Nelson ◽  
A. Kahmen
Keyword(s):  
Stable Isotope ◽  
Water Uptake ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Plant Water ◽  
Plant Water Uptake ◽  
Cryogenic Vacuum ◽  
Uptake Studies

Water uptake regulation in peach trees with split-root systems

1994 ◽  
Vol 17 (4) ◽  
pp. 379-388 ◽  
Author(s):  
T. SIMONNEAU ◽  
R. HABIB
Keyword(s):  
Water Uptake ◽  
Root Systems ◽  
Split Root ◽  
Peach Trees

scholarly journals Traits and selection strategies to improve root systems and water uptake in water-limited wheat crops

2012 ◽  
Vol 63 (9) ◽  
pp. 3485-3498 ◽  
Author(s):  
A. P. Wasson ◽  
R. A. Richards ◽  
R. Chatrath ◽  
S. C. Misra ◽  
S. V. S. Prasad ◽  
...  
Keyword(s):  
Water Uptake ◽  
Root Systems ◽  
Selection Strategies
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