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Related Concept Videos

Contact-dependent Signaling01:19

Contact-dependent Signaling

Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...
What is Cell Signaling?02:03

What is Cell Signaling?

Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
What is Cell Signaling?02:03

What is Cell Signaling?

Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
Overview of Cell Signaling01:23

Overview of Cell Signaling

Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
Assembly of Signaling Complexes01:30

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Overview of Cell Signaling01:23

Overview of Cell Signaling

Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...

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Imaging G-protein Coupled Receptor (GPCR)-mediated Signaling Events that Control Chemotaxis of Dictyostelium Discoideum
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Guard cells: a dynamic signaling model.

Liu-Min Fan1, Zhixin Zhao, Sarah M Assmann

  • 1Biology Department, Pennsylvania State University, 208 Mueller Laboratory, University Park, Pennsylvania 16802-5301, USA.

Current Opinion in Plant Biology
|September 1, 2004
PubMed
Summary
This summary is machine-generated.

Guard cells utilize diverse mechanisms to sense and respond to abscisic acid and blue light. New research in 2003 illuminated the biochemical pathways and extracellular matrix roles in stomatal regulation.

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Area of Science:

  • Plant physiology
  • Molecular biology
  • Biochemistry

Background:

  • Guard cells regulate stomatal pores, crucial for plant gas exchange and water balance.
  • Abscisic acid (ABA) is a key plant hormone mediating stress responses, including stomatal closure.
  • Blue light influences stomatal opening, a process involving complex signaling pathways.

Purpose of the Study:

  • To synthesize recent advancements in understanding guard cell responses to abscisic acid.
  • To explore the biochemical mechanisms underlying guard cell responses to blue light.
  • To investigate the role of the extracellular matrix in stomatal regulation.

Main Methods:

  • Review and synthesis of research published in 2003.
  • Analysis of biochemical and molecular data related to plant hormone signaling.
  • Examination of studies on light perception and extracellular matrix interactions.

Main Results:

  • Significant progress in elucidating the biochemical pathways of abscisic acid perception and signaling in guard cells.
  • Enhanced understanding of the molecular mechanisms by which blue light affects guard cell function.
  • Identification of novel roles for the extracellular matrix in modulating stomatal aperture and plant water status.

Conclusions:

  • Guard cell signaling is a complex, multi-faceted process involving hormonal, light, and structural components.
  • Continued research in 2003 has deepened our knowledge of plant responses to environmental cues.
  • Future studies are expected to further unravel the intricate regulation of stomatal function.