Related Experiment Video
Updated: Dec 31, 2025
10:47
Xylem Water Distribution in Woody Plants Visualized with a Cryo-scanning Electron Microscope
Published on: June 20, 2019
9.1K
Xylem form and function under extreme nutrient limitation: an example from California's pygmy forest
Katharine L Cary1, Gina M Ranieri1, Jarmila Pittermann1
1University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA, 95064, USA.
The New Phytologist
|January 5, 2020
Summary
Nutrient limitation significantly alters plant xylem structure and function, impacting water transport. This study reveals unpredictable, species-specific changes in drought survival traits, even without water stress.
Area of Science:
- Plant Physiology
- Ecology
- Wood Anatomy
Background:
- Xylem anatomy and function are crucial for plant growth and drought survival.
- The effects of nutrient limitation on xylem are not well understood.
- Pygmy forests offer a unique system to study nutrient limitation without water stress.
Purpose of the Study:
- To investigate how nutrient limitation affects xylem structure and function.
- To compare xylem traits between pygmy forest plants and conspecifics on richer soils.
- To understand the impact of edaphic stress on water transport.
Main Methods:
- Studied thirteen anatomical and hydraulic traits in four plant species.
- Compared pygmy forest plants with conspecifics from nutrient-rich soils.
- Analyzed resistance to cavitation (P50) and leaf-specific conductivity (KL).
Main Results:
- Nutrient limitation caused smaller xylem conduits and higher leaf-specific conductivity (KL).
- Resistance to cavitation (P50) showed species-specific responses, with increases and decreases observed.
- Edaphic stress altered xylem structure and water transport, independent of water stress.
Conclusions:
- Nutrient limitation significantly impacts xylem structure and water transport, even without drought.
- Cavitation resistance shifts are species-specific and unpredictable under nutrient limitation.
- Findings have implications for assessing plant drought survival in natural ecosystems.
Keywords:
Sequoia sempervirens (redwood)cavitation resistanceconduit diameterembolismhydraulic conductivitypygmy forestvulnerability curvewood anatomyMore Related Videos
Related Concept Videos
02:03Xylem and Transpiration-driven Transport of Resources
26.1K
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.
26.1K
02:41Responses to Drought and Flooding
11.8K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.8K
02:34Water and Mineral Acquisition
35.1K
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.
35.1K
02:40Epiphytes, Parasites, and Carnivores
16.4K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
16.4K
01:20Tonicity in Plants
32.0K
Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
32.0K
00:53Tonicity in Plants
59.3K
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
59.3K