The cells that conduct water in plants are tracheids or vessel members, both of which make up the plant tissue known as xylem. The type of cell predominant in xylem depends on the type of plant, but most species in all groups have at least some tracheids.Know More
Tracheids are the only types of cells that conduct water in seedless vascular plants, such as ferns, and most gymnosperms, such as pine trees. Tracheids are narrow and elongated hollow cells. They have thin, modified cell walls known as pit membranes. The membranes permit passage of water between vessels while protecting against damaging air bubbles.
Vessel members are very similar in basic shape to tracheids, but they are even more specialized to carry water efficiently. Instead of pit membranes, they have perforations, which are areas that lack both a cell wall and a cell membrane. These allow water to pass very easily between cells, but they provide less protection against air bubbles. As a result, the cells are more likely to suffer fractures and disruptions. Vessel members are the primary cells in the xylem of flowering plants.
Both types of cells are accompanied by fiber cells that provide structural support. In woody plants, the cells that make up xylem tissue form rings, with only the outermost ring living, and the rest provide support for the plant.Learn more about Cells
A group of cells that performs a similar function is known as a tissue. Multicellular organisms such as animals all contain differentiated cells that have adapted to perform specific functions. These differentiated cells group together to form tissues. A group of tissues that perform similar functions are known as organs.Full Answer >
How Stuff Works explains that water reaches the leaves of plants through the xylem vessels, and it escapes through small holes in the leaf known as stomata. The process by which the water moves from the capillaries to the xylem vessels and into the stomata is called transpiration. Plants absorb water through their roots, which contain capillaries. The capillaries are responsible for sending water through the xylem vessels.Full Answer >
Tissue culture is a biological research process that involves transferring tissue fragments from a plant or animal to an artificial environment wherein the fragments continue to survive and function, according to Encyclopaedia Britannica. The cultured tissue may contain a single cell, a cell population, an entire organ or part of an organ.Full Answer >
Distinguishing characteristics of the phylum Gnetophyta include the presence of both tracheids and vessels in their xylem tissue, a unique fertilization feature in which a tube grows from the eggs to unite with pollen tubes, and being the only division of gymnosperms that undergo double fertilization. Gnetophyta plants include trees, shrubs, or stumpy, turnip-like growth forms with simple leaves.Full Answer >