Related Experiment Video
Updated: Jun 1, 2026
07:49
Stepwise Cell Seeding on Tessellated Scaffolds to Study Sprouting Blood Vessels
Published on: January 14, 2021
Analysis of circular bordered pit function I. Angiosperm vessels with homogenous pit membranes
1Biology Department, University of Utah, 257 South 1400 East, Salt Lake City, Utah 84112 USA.
American Journal of Botany
|June 10, 2011
Summary
Plant xylem conductivity is optimized by vessel length and pit structure, ensuring water transport safety under drought stress. This study models how these factors influence water flow and prevent vessel collapse.
Area of Science:
- Plant physiology
- Xylem hydraulics
- Biophysics
Background:
- Plant xylem vessels transport water under tension, making them vulnerable to cavitation and collapse.
- Pit structure and vessel dimensions critically influence xylem hydraulic efficiency and safety.
Purpose of the Study:
- To model and predict pit and vessel conductivity, cavitation pressure, and vessel implosion pressure in angiosperms.
- To understand the safety factors and hydraulic optimization in xylem under varying air-seed pressures.
Main Methods:
- Utilized measurements from 27 angiosperm species.
- Developed a model to predict hydraulic properties based on pit and vessel morphology.
- Analyzed the relationship between air-seed pressure, vessel wall thickness, and implosion pressure.
Main Results:
- Vessel implosion pressure exceeded air-seed pressure by a safety factor of 1.8.
- Intervessel pitting reduced implosion pressure by 20-40%.
- Pit hydraulic conductivity decreased significantly with increasing air-seed pressure, while vessel conductivity maximized at a 'saturating vessel length'.
Conclusions:
- Xylem hydraulic safety is maintained by increased vessel wall thickness relative to diameter.
- Optimal vessel length balances conductivity and cavitation risk.
- Pit structure and vessel morphology are key adaptations for efficient and safe water transport in plants.
Related Concept Videos
00:38Pinocytosis
Cells use energy-requiring bulk transport mechanisms to transfer large particles or large numbers of small particles into or out of the cell. The cells envelop the particles in spherical membranes called vesicles or vacuoles. Vesicles that transport material into the cell are built from the cell membrane. These vesicles encapsulate external molecules and transport them into the cell in a process called endocytosis.
Pinocytosis ("cellular drinking") is one of three main types of endocytosis. In...
Pinocytosis ("cellular drinking") is one of three main types of endocytosis. In...
00:43Pinocytosis
Cells use energy-requiring bulk transport mechanisms to transfer large particles, or large amounts of small particles, into or out of the cell. The cells envelop the particles in spherical membranes called vesicles or vacuoles. Vesicles that transport material into the cell are built from the cell membrane. These vesicles encapsulate external molecules and transport them into the cell in a process called endocytosis.
01:20Overview of the Vascular System
The vascular system comprises an extensive network of arteries, capillaries, and veins. The vascular system can be broadly divided into the blood and lymphatic systems. Typically, blood vessels can be categorized into three histological regions: tunica intima, tunica media, and tunica adventitia. The tunica intima consists of a single layer of endothelial cells attached to the basal lamina. Underlying the basal lamina is a connective tissue layer and an elastic lamina that gives stability and...
02:32Plasmodesmata
The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
01:15Structure of Blood Vessels
Blood is circulated throughout the human body through a network of blood vessels called the circulatory system. This system includes arteries that transport blood from the heart to various body parts. These arterial pathways divide into smaller vessels until they reach the arterioles, which further split into capillaries. It is within these minuscule capillaries that the exchange of nutrients and waste products takes place. After this exchange, the blood is collected by venules, which fuse to...
02:03Xylem and Transpiration-driven Transport of Resources
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.