Related Experiment Video
Updated: Nov 5, 2025
13:14
Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers
Published on: August 22, 2014
11.6K
Dew water-uptake pathways in Negev desert plants: a study using stable isotope tracers
Amber J Hill1, Todd E Dawson2, Avraham Dody3
1The Jacob Blaustein Institutes for Desert Research, Sede Boqer Campus Midreshet Ben Gurion, Ben Gurion University of the Negev, 84990, Beersheba, Israel. bamerbright@gmail.com.
Oecologia
|May 19, 2021
Summary
Desert plants absorb dew water through various pathways, with uptake varying by species and microenvironment. This study investigated dew water absorption in Artemesia sieberi, Salsola inermis, and Haloxylon scoparium using isotopic tracers.
Area of Science:
- Botany
- Plant Physiology
- Ecology
Background:
- Dew is a critical water source for desert flora.
- Desert plants exhibit diverse water uptake mechanisms beyond root absorption.
- Understanding dew utilization is key to desert plant survival.
Purpose of the Study:
- To investigate dew water uptake pathways in dominant Negev desert plant species.
- To determine if desert plants can absorb dew directly through leaves and stems.
- To compare dew water absorption efficiency among different species.
Main Methods:
- An isotopic water tracer was used to track dew water movement.
- Water was applied to soil or foliage/stems of three plant species (Artemesia sieberi, Salsola inermis, Haloxylon scoparium).
- Isotopic composition of water in roots and stems was measured over time.
Main Results:
- Plant species differed in their capacity to utilize dew water.
- Evidence of foliar dew water uptake was observed, influenced by microenvironmental conditions.
- Artemesia sieberi showed significant uptake via stems and roots; Salsola inermis primarily via roots; Haloxylon scoparium had minimal dew capture.
Conclusions:
- Desert plants possess varied mechanisms for dew water absorption.
- Foliar uptake of dew is a viable water acquisition strategy for some desert species.
- Species-specific adaptations influence dew utilization efficiency in arid environments.
More Related Videos
Related Concept Videos
02:34Water and Mineral Acquisition
34.3K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
34.3K
01:57Adaptations that Reduce Water Loss
27.0K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
27.0K
02:12Short-distance Transport of Resources
16.9K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
16.9K
01:27C4 Pathway and CAM
47.4K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
47.4K
02:02Responses to Salt Stress
13.7K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.7K
02:03Xylem and Transpiration-driven Transport of Resources
25.2K
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
25.2K