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Related Concept Videos

Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...

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Measuring Spatial and Temporal Ca2+ Signals in Arabidopsis Plants
10:12

Measuring Spatial and Temporal Ca2+ Signals in Arabidopsis Plants

Published on: September 2, 2014

Dissecting calcium oscillators in plant cells.

J F Harper1

  • 1Dept of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. harper@scripps.edu

Trends in Plant Science
|September 7, 2001
PubMed
Summary

Understanding calcium (Ca2+) signaling in plants requires identifying Ca2+ transporters. Research highlights calmodulin-dependent Ca2+ pumps and antiporters, crucial for regulating Ca2+ levels and signaling pathways.

Area of Science:

  • Plant molecular biology
  • Cellular signaling
  • Biochemistry

Background:

  • Calcium ions (Ca2+) act as critical second messengers in plant cells.
  • Understanding Ca2+ signaling necessitates the comprehensive identification of Ca2+ transporters and their regulatory mechanisms.

Discussion:

  • Calmodulin-dependent Ca2+ -pumps were the first plant Ca2+ transporters identified with regulated activity.
  • The regulation of these pumps underscores the importance of controlling Ca2+ efflux rates for effective Ca2+ signaling.
  • Identifying Ca2+ pumps and antiporters across various subcellular compartments is key to deciphering plant Ca2+ signaling complexity.

Key Insights:

  • Calmodulin-dependent Ca2+ -pumps play a significant role in regulating Ca2+ flux.
  • Subcellular localization of Ca2+ transporters provides insights into spatial control of Ca2+ signaling.
Keywords:
Non-programmatic

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  • The study emphasizes the functional importance of Ca2+ efflux regulation.

    • Outlook:

    • Further research will focus on the precise roles of various Ca2+ transporters in different plant tissues and developmental stages.
    • Investigating the interplay between different Ca2+ transporters and regulatory proteins will enhance our understanding of Ca2+ signal transduction.
    • This work provides a foundation for exploring how manipulating Ca2+ transport can improve plant stress tolerance and development.