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Related Concept Videos

The Apoplast and Symplast01:46

The Apoplast and Symplast

Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
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Short-distance Transport of Resources

Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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Water and Mineral Acquisition

Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
Xylem and Transpiration-driven Transport of Resources02:03

Xylem 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.
Regulation of Transpiration by Stomata02:04

Regulation of Transpiration by Stomata

During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
Permeability of Concrete01:25

Permeability of Concrete

Permeability in the context of concrete refers to how easily liquids or gases can pass through the material. This quality is crucial for assessing the water-tightness and durability of concrete structures and their resistance to chemical attacks. Concrete permeability can be determined through comparative laboratory tests. These tests typically involve sealing a concrete specimen from the sides, applying water pressure to the top surface with pressure, and measuring the amount of water passing...

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Updated: Jun 19, 2026

Measuring the Osmotic Water Permeability Coefficient (Pf) of Spherical Cells: Isolated Plant Protoplasts as an Example
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Measuring the Osmotic Water Permeability Coefficient (Pf) of Spherical Cells: Isolated Plant Protoplasts as an Example

Published on: October 8, 2014

A COMPARATIVE STUDY OF PERMEABILITY IN PLANTS.

W J Osterhout1

  • 1Laboratory of Plant Physiology, Harvard University, Cambridge.

The Journal of General Physiology
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

This study reveals that various aquatic plants, including brown, green, and red algae, alongside seagrasses, exhibit similar permeability changes. These findings highlight a conserved physiological response across diverse plant types.

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Related Experiment Videos

Last Updated: Jun 19, 2026

Measuring the Osmotic Water Permeability Coefficient (Pf) of Spherical Cells: Isolated Plant Protoplasts as an Example
14:20

Measuring the Osmotic Water Permeability Coefficient (Pf) of Spherical Cells: Isolated Plant Protoplasts as an Example

Published on: October 8, 2014

An in vivo Assay to Test Blood Vessel Permeability
07:03

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Area of Science:

  • Marine Botany
  • Plant Physiology
  • Algology

Background:

  • Plant cell membranes regulate the passage of substances.
  • Understanding permeability is crucial for plant survival and adaptation.

Purpose of the Study:

  • To investigate and compare the permeability behavior of diverse plant species.
  • To identify common physiological responses in different aquatic flora.

Main Methods:

  • Quantitative analysis of permeability.
  • Comparative study across Laminaria (brown alga), Ulva (green alga), Rhodymenia (red alga), and Zostera (flowering plant).

Main Results:

  • All studied plant types demonstrated fundamentally similar responses to changes in permeability.
  • No significant divergence in permeability behavior was observed between algae and the flowering plant.

Conclusions:

  • The physiological mechanisms governing permeability are conserved across a wide range of aquatic plant taxa.
  • This suggests a shared evolutionary basis for membrane transport regulation in these organisms.