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Translocation
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- The transport mechanism in phloem is known as translocation. It involves an active process where sugars load into sieve tubes in the leaves (source) and unload where they are needed (sink), such as roots or developing shoots.
sciencenotes.org/xylem-and-phloem-plant-vascular-system/Xylem and Phloem - Plant Vascular System - Science Notes and ...
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The. phloem. moves food substances that the plant has produced by photosynthesis to where they are needed for processes such as: growing parts of the plant for immediate use. storage organs such...
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- Phloem Definition
- Function of Phloem
- Structure of Phloem
- Related Biology Terms
- Quiz
Phloem is the complex tissue, which acts as a transport system for soluble organic compounds within vascular plants. The phloem is made up of living tissue, which uses turgor pressure and energy in the form of ATP to actively transport sugars to the plant organs such as the fruits, flowers, buds and roots; the other material that makes up the vascu...
Through the system of translocation, the phloem moves photoassimilates, mainly in the form of sucrose sugars and proteins, from the leaves where they are produced by photosynthesisto the rest of the plant. The sugars are moved from the source, usually the leaves, to the phloem through active transport. The next step, translocation of the photoassim...
The structure of the phloem is made up of several components. Each of the components work together to facilitate the conduction of sugars and amino acids, from a source, to sink tissues where they are consumed or stored.
Xylem– One of two types of transport tissue within vascular plants, xylem is responsible for the transport of water from the roots to the leaves and shoots.Photosynthesis– The process which most plants use to convert energy from the sunlight, water and carbon dioxide into oxygen and carbohydrates.Photoassimilates– The biological compounds (usually energy-storing monosaccharaides) which are produced by photosynthesis.ATP– Adenosine triphosphate is the high-energy molecule that transports energy for metabolism within cells.1. What is the main function of the phloem? A. Transporting nutrients from a source to a sink B. Transporting nutrients from a sink to a source C. Transporting water from a sink to a source D.Transporting water from a source to a sink 2. What service does the companion cell not provide to the sieve element? A. Providing energy B. Communication betw...
The. phloem. moves food substances that the plant has produced by photosynthesis to where they are needed for processes such as: growing parts of the plant for immediate use. storage organs such...
Phloem (/ ˈfloʊ.əm /, FLOH-əm) is the living tissue in vascular plants that transports the soluble organic compounds made during photosynthesis and known as photosynthates, in particular the sugar sucrose, [1] to the rest of the plant. This transport process is called translocation. [2]
Translocation through the phloem is dependent on metabolic activity of the phloem cells (in contrast to transport in the xylem). Chilling its petiole slows the rate at which food is translocated out of the leaf (above). Oxygen lack also depresses it. Killing the phloem cells puts an end to it.
Sugars, amino acids and other organic substances (nutrients) are transported in phloem. Translocation starts at a source, such as a leaf where sugars are made. Sugars are transported into phloem by active transport across the membranes of the living phloem cells.
Jul 11, 2023 · Phloem transports organic nutrients, particularly sugars synthesized during photosynthesis, from the leaves to all other cells of the plant, including the roots. Phloem tissue is composed of sieve-tube elements, companion cells, phloem fibers, and phloem parenchyma.
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