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Related Concept Videos

Tonicity in Plants00:53

Tonicity in Plants

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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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Tonicity in Plants01:20

Tonicity in Plants

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Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
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Actin Polymerization and Cell Motility01:13

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Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
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Enlargement of the Plasma Membrane01:22

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Cell division and enlargement are processes that require precise control. The control ensures that cell division cannot proceed unless the cell has grown to a specific size. A spherical, dividing cell requires an approximately 1.6X increase in its surface area to double its volume. The secretory pathway also has a significant role in cell membrane enlargement. Secretory vesicles that bud off from the Golgi apparatus and later fuse with the plasma membrane during exocytosis are a major source of...
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Tonicity in Animals01:16

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Tonicity describes the amount of solute in a solution. The measure of the tonicity of a solution, or the total amount of solutes dissolved in a specific amount of solution, is called its osmolarity. Three terms—hypotonic, isotonic, and hypertonic—are used to relate the osmolarity of a cell to the osmolarity of the extracellular fluid that contains the cells. In a hypotonic solution, such as tap water, the extracellular fluid has a lower concentration of solutes than the fluid inside...
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Molecular Weight of Step-Growth Polymers01:08

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
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AFM-based Mapping of the Elastic Properties of Cell Walls: at Tissue, Cellular, and Subcellular Resolutions
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Force-Driven Polymerization and Turgor-Induced Wall Expansion.

Olivier Ali1, Jan Traas2

  • 1Laboratoire de Reproduction et Développement des Plantes, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, Institut National de la Recherche Agronomique (INRA) Centre National de la Recherche Scientifique (CNRS), Lyon, France; Virtual Plants INRIA Team, Unité Mixte de Recherche (UMR) Amélioration Génétique et Adaptation des Plantes (AGAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Institut National de Recherche en Informatique et en Automatique (INRIA), INRA, Montpellier, France.

Trends in Plant Science
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Summary
This summary is machine-generated.

Mechanical forces drive cell wall polymerization, influencing plant shape during development. Genetic regulation modulates this process, linking molecular control to tissue morphogenesis.

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Biophysics

Background:

  • Plant morphogenesis relies on cell wall yielding regulated by molecular players.
  • The mechanochemical equilibrium of the cell wall links molecular growth control to tissue shape.
  • Understanding the mechanisms of shape change during development is crucial.

Purpose of the Study:

  • To investigate the role of force-driven cell wall polymerization in plant morphogenesis.
  • To explore how mechanical forces and genetic regulation influence cell wall component insertion.
  • To formalize the link between mechanical forces and growth control in a mathematical model.

Main Methods:

  • Development of a mathematical model for force-driven cell wall polymerization.
  • Analysis of the role of mechanical forces in inserting cell wall components, particularly pectins.
  • Testing the model against published experimental data.

Main Results:

  • Mechanical forces are proposed to facilitate cell wall component insertion, including pectins.
  • This force-driven polymerization is identified as a central process in growth control.
  • The mathematical model provides a framework for understanding this mechanochemical process.

Conclusions:

  • Force-driven cell wall polymerization is a key mechanism in plant morphogenesis.
  • Genetic regulation can modulate the insertion of cell wall components via mechanical forces.
  • The study establishes a link between molecular growth regulation and tissue shape evolution.