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In plant anatomy, sieve tube elements, are a specialized type of elongated cell in the phloem tissue of flowering plants. The ends of these cells connect with other sieve tube members, making up the sieve tube, whose main function is transport of carbohydrates in the plant.
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The cells that function with the sieve tubes are the?
Cells containing sieve plates are called sieve tube members, a component of the phloem, which carries sugars produced in the leaves to various parts of the plant. They are characteristic of angiosperms (flowering plants) while gymnosperms (cone-bearing plants) have only sieve cells. Sieve cells and sieve tube members are collectively referred to as sieve elements.
How is sieve tube different from companion cells?
The sieve tube elements are specialized elongated cells in the phloem that connect end to end forming a tube. The main function of this tube is to transport nutrition in the form of carbohydrates. Sieve cells have no nucleus, ribosomes and cytoplasm, meanin they cannot carry out primary metabolic activities. The companion cells, which are closely associated with the sieve tube elements, carry out the their metabolic functions.
What is the structure of the Phloem?
Phloem is composed of sieve elements and companion cells. Each sieve element has a companion cell that provides ATP and other necessary support to the sieve element. In addition to this there are sieve plates that separate sieve cells.
What are nucleated cells of the phloem which aid in the physiology of sieve tubes called?
The nucleated cells in the phloem that aid in the physiology of sieve tubes are called companion cells. These cells are closely associated with sieve tube cells and provide metabolic support, such as loading and unloading of nutrients, for the sieve tubes.
What are phloem vessels made of?
Phloem vessels are made of living cells, including sieve tube elements and companion cells. Sieve tube elements are elongated cells that form the main transport conduits, while companion cells provide metabolic support to the sieve tube elements. Together, these two types of cells make up the structure of phloem vessels.
Do sieve cells have nucleus?
Seive cells have a nucleus.Seive tube elements do not have a nucleus.
What are the constituents of phloem?
The phloem consists mainly of sieve tubes, companion cells, phloem fibers, and parenchyma cells. Sieve tubes are responsible for transporting sugars and other organic compounds, while companion cells support sieve tube function. Phloem fibers provide structural support, and parenchyma cells store nutrients.
What are dead xylem and phloem cells of a woody plant called?
Dead xylem cells are called "tracheids" or "vessel elements," while dead phloem cells are called "sieve cells" or "sieve tube members."
What are sieve-tube cells?
In plant anatomy, sieve tube elements, are a specialized type of elongated cell in the phloem tissue of flowering plants. The ends of these cells connect with other sieve tube members, making up the sieve tube, whose main function is transport of carbohydrates in the plant.
What is the sugar-transporting cells in angiosperms?
In angiosperms, the sugar-transporting cells are known as sieve tube cells, which are part of the phloem tissue. These cells are responsible for transporting sugars, mainly sucrose, from photosynthetic tissues to non-photosynthetic parts of the plant for energy and growth. Sieve tube cells are connected end-to-end to form sieve tubes, allowing for efficient long-distance transport of sugars throughout the plant.
What is a sieve phloem?
Sieve phloem is a specialized tissue in plants that is responsible for transporting organic nutrients such as sugars from the leaves to other parts of the plant. It is made up of sieve tube elements and companion cells, which work together to facilitate the flow of nutrients through the plant.
What are the sugar-transporting cells in angiosperms?
sieve-tube elements
