Phloem-rich Tissue
Phloem-rich Tissue - Related Videos
02:10
Phloem and Sugar Transport
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2026
Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic tissues that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic cells to other specialized tissues by a process called translocation.Within a plant, tissues that...
09:38
Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method
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Cited by 88 •
2013
Knowledge of the composition of the phloem sap as well as the mechanism of its loading and long-distance transport is essential for the understanding of long-distance signaling in plant development and stress/pathogen response and of assimilate transport. This manuscript describes the collection of phloem exudates using the EDTA-facilitated method.
11:23
Phloem Sap Sampling from Brassica napus for 3D-PAGE of Protein and Ribonucleoprotein Complexes
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Cited by 13 •
2018
Here we present a protocol to analyze the protein composition of large native protein:protein and protein:nucleic acid complexes from oilseed rape (B. napus) phloem exudate using a 3D polyacrylamide gel electrophoresis (PAGE) approach combining blue native (BN) with two denaturing PAGEs followed by mass spectrometric identification.
14:16
A New Application of the Electrical Penetration Graph (EPG) for Acquiring and Measuring Electrical Signals in Phloem Sieve Elements
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Cited by 24 •
2015
Electrical Penetration Graph (EPG) is a well-established technique for studying the feeding behavior of stylet-bearing insects. Here we show a new application of EPG as a non-invasive tool for the acquisition of intracellular electrophysiology recordings of sieve elements (SEs), the cells that form the phloem vasculature in plants.
07:48
Working with Human Tissues for Translational Cancer Research
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Cited by 4 •
2015
Translational cancer research is dependent on extraction of human tissues. Much work has gone into optimizing extraction methods for ex vivo analysis. Here, we describe tissue processing methods allowing for maximal data output from limited samples.
FAQs
Solute loading increases the concentration of dissolved substances within the phloem. This raises osmotic pressure, causing water to enter the transport pathway. The resulting pressure supports bulk flow through the tissue, linking solute accumulation with water movement rather than relying on isolated movement of each nutrient molecule. This mechanism helps explain how material travels between plant regions.
Sieve-tube elements form the principal conducting pathway, with sieve plates linking adjacent elements into a continuous route. Companion cells support this transport system and are associated with the movement and handling of transported solutes. Their organization illustrates how specialized cell types cooperate to maintain distribution through phloem-rich tissue, a feature relevant to biological transport design.
Pressure differences provide the driving force for bulk flow from source organs toward growing or storage tissues, called sinks. Solute loading contributes to this pressure by increasing osmotic pressure and drawing in water. Consequently, transport direction reflects the relationship between producing regions and recipient regions, making source-to-sink regulation central to understanding tissue function.
The tissue links organs that produce organic nutrients with regions that use or store them. Its transport activity therefore influences how resources are distributed to growing or storage tissues. Studying this connection helps bioengineers examine source-to-sink regulation as an integrated process, rather than treating nutrient movement and plant development as unrelated phenomena.
As a model system, phloem-rich tissue supports investigation of biological fluid transport, plant growth, and source-to-sink regulation. Its linked conducting cells, supporting companion cells, solute loading, water entry, and pressure-driven flow provide connected features for examining how biological networks distribute dissolved materials. These principles can guide analysis of transport organization in engineered plant systems.
The arrangement of sieve-tube elements, sieve plates, and companion cells offers a biological example of coordinated transport and support. Its coupling of solute loading, water movement, and pressure differences may inform bioinspired networks designed for efficient solute distribution. In engineered plant systems, this perspective can help connect network structure with the controlled delivery of organic nutrients and signals.