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Related Concept Videos

pH Regulation in Cells01:28

pH Regulation in Cells

6.1K
pH plays a critical role in maintaining normal cellular activities. It helps maintain the structure and function of various proteins, dictates the charge on cellular membranes, and is crucial for metabolic reactions inside the cell. Moreover, cells use the energy from the proton motive force to generate ATP.
Cytosolic pH
Under physiological conditions, the cytosolic pH is slightly more acidic than the extracellular pH. However, cells must prevent further acidification of their cytosol to...
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pH Homeostasis01:31

pH Homeostasis

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Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation.
Respiratory...
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Factors Influencing Microbial Growth: pH01:29

Factors Influencing Microbial Growth: pH

39
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
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pH01:24

pH

134.0K
The potential of hydrogen (pH) is a measure of the acidity or basicity of a water-based solution determined by the concentration of hydronium ions (H3O+). In one liter of pure water at neutral pH, there are 1×10−7 moles of hydronium ions. However, the extensive range of hydronium ion concentrations present in water-based solutions makes measuring pH in moles cumbersome. Therefore, a pH scale was developed to convert moles of hydronium ions into the negative logarithm of the hydronium...
134.0K
Stomach pH Regulation01:21

Stomach pH Regulation

6.1K
The human body carefully regulates the internal pH of different organs to maintain homeostasis. For example, while the blood plasma maintains a neutral pH of 7, the stomach lumen has an acidic pH of 1.5 - 3.5. The low pH of stomach lumen helps kill pathogens in the food and break down complex food molecules.
The acid-secreting gastric mucosal epithelial cells (parietal cells) lining the stomach lumen maintain the low pH in the lumen. Numerous ion transporters and channels on these parietal...
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Tonicity in Plants00:53

Tonicity in Plants

53.6K
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
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Quantitative imaging of apoplastic pH in plant roots via confocal microscopy.

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Pectin methylesterase activity is required for RALF1 peptide signalling output.

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Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants.

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FRUITFULL Is a Repressor of Apical Hook Opening in <i>Arabidopsis thaliana</i>.

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Related Experiment Video

Updated: Jul 17, 2025

Measurement of Vacuolar and Cytosolic pH In Vivo in Yeast Cell Suspensions
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Measurement of Vacuolar and Cytosolic pH In Vivo in Yeast Cell Suspensions

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Orchestrating pH levels in plants.

Elke Barbez1,2

  • 1Center for Integrative Biological Signalling Studies (CIBSS), University of Freiburg, Freiburg, Germany.

Elife
|August 30, 2023
PubMed
Summary
This summary is machine-generated.

Plant root growth depends on precisely controlled surface pH. Understanding root zone pH is crucial for optimizing plant development and nutrient uptake.

Keywords:
A. thalianaauxinpHplant biologyroot

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Optical Quantification of Intracellular pH in Drosophila melanogaster Malpighian Tubule Epithelia with a Fluorescent Genetically-encoded pH Indicator
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Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy
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Area of Science:

  • Plant Biology
  • Soil Science
  • Biochemistry

Background:

  • Root surface pH is a critical factor influencing nutrient availability and absorption.
  • The rhizosphere, the soil region directly influenced by root secretions, plays a key role in nutrient cycling.
  • Maintaining optimal root surface pH is essential for plant health and agricultural productivity.

Discussion:

  • Changes in root surface pH can affect the solubility and uptake of essential minerals like phosphorus and iron.
  • Microbial communities in the rhizosphere are sensitive to pH fluctuations, impacting nutrient transformations.
  • Plant physiological responses, including root elongation and branching, are modulated by root zone pH.

Key Insights:

  • Precise regulation of root surface pH is a fundamental mechanism driving plant root growth.
  • The study highlights the intricate relationship between root exudates, soil chemistry, and plant development.
  • Understanding pH control mechanisms can lead to strategies for improving crop yields in challenging soil conditions.

Outlook:

  • Further research into the molecular mechanisms of pH sensing and regulation in roots is warranted.
  • Developing pH-modulating strategies could enhance nutrient use efficiency and reduce fertilizer requirements.
  • This knowledge can inform agricultural practices for sustainable crop production and soil health management.