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Related Concept Videos

Solvents01:12

Solvents

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A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
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Responses to Salt Stress02:02

Responses to Salt Stress

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Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
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Solubility Equilibria03:07

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Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many natural and technological processes, ranging from tooth decay to water purification. An understanding of the factors affecting compound solubility is, therefore, essential to the effective management of these processes. This section applies previously introduced equilibrium concepts and tools to systems involving dissolution and precipitation.
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Solubility Equilibria: Overview01:09

Solubility Equilibria: Overview

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When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
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Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
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Solubility Equilibria: Ionic Product of Water01:16

Solubility Equilibria: Ionic Product of Water

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Pure water is a weak electrolyte; only a small amount ionizes into hydrogen and hydroxide ions. At any given temperature, the concentration of undissociated water is almost constant, so the ionic product of water is the product of the hydrogen and hydroxide ion concentrations, denoted as Kw. The square root of Kw gives the individual ion concentrations.
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Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers
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Solute distribution in Suaeda maritima.

J Gorham1, R G Wyn Jones

  • 1Department of Biochemistry and Soil Science, University College of North Wales, LL57 2UW, Bangor, Gwynedd, UK.

Planta
|November 23, 2013
PubMed
Summary
This summary is machine-generated.

Salt-treated Suaeda maritima shows higher potassium/sodium ratios and glycinebetaine in younger tissues. This distribution aids in salt tolerance by managing ion balance within plant cells.

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Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
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Area of Science:

  • Plant Physiology
  • Environmental Stress Biology
  • Biochemistry

Background:

  • Suaeda maritima is a model organism for studying plant salt tolerance.
  • Understanding ion distribution is crucial for plant survival in saline environments.
  • Glycinebetaine is a known osmoprotectant in plants.

Purpose of the Study:

  • To investigate the distribution of sodium (Na+), potassium (K+), and glycinebetaine in Suaeda maritima under salt stress.
  • To correlate solute distribution with salt tolerance mechanisms.

Main Methods:

  • Semi-micro techniques for extraction and analysis of solutes.
  • Toluene-water extraction.
  • Electron-probe X-ray microanalysis (EPMA) on frozen-fractured tissues.

Main Results:

  • Higher K+/Na+ ratios were found in apical regions and axillary buds compared to mature tissues.
  • Younger tissues exhibited significantly higher levels of glycinebetaine.
  • EPMA revealed higher K+/Na+ ratios and elevated sulfur and phosphorus in the cytoplasm of young leaf cells versus vacuoles.

Conclusions:

  • Subcellular compartmentation of solutes plays a key role in salt tolerance in Suaeda maritima.
  • Differential ion distribution, particularly higher K+/Na+ in younger tissues and cytoplasm, contributes to managing salt stress.
  • Glycinebetaine accumulation in young tissues is a significant component of the plant's salt tolerance strategy.