NDLI: Calcium signaling system in plants

Content Provider	Springer Nature Link
Author	Medvedev, S. S.
Copyright Year	2005
Abstract	Calcium ions have unique properties and universal ability to transmit diverse signals that exert primary action on cells, such as hormones, pathogens, light, gravity, and stress factors. The principal elements in the system of calcium signaling of plant cells are different Ca$^{2+}$ channels, Ca$^{2+}$-ATPases, Ca$^{2+}$/H$^{+}$ antiporters, Ca$^{2+}$-binding and Ca$^{2+}$-dependent proteins. The system of calcium signaling also includes receptors, the cascades of amplifying Ca$^{2+}$ signals, and transcription factors. The process of transmitting the calcium signal within the cell consists of at least two stages. At the first stage, the cytosolic calcium concentration undergoes temporal and usually local increase due to its entry through the Ca$^{2+}$ channels. The second stage is related to the signal “decay” and represents the active removal of calcium excess from the cytosol to the extracellular medium or organelles (vacuoles, endoplasmic reticulum, mitochondria) by means of Ca$^{2+}$-ATPases and/or Ca$^{2+}$/H$^{+}$ antiporters. The primary intracellular targets of calcium are various calcium-binding proteins. Some of these proteins ensure Ca$^{2+}$ transport, others serve as a calcium buffer, and the others (e.g., calmodulin or Ca$^{2+}$-dependent protein kinases) translate the calcium signal to intracellular operational mechanisms and initiate Ca$^{2+}$-dependent physiological processes. An important feature of the calcium signal transduction is that this signal originates and propagates in the pulse mode. Such way of information transmission is not only faster than the diffusion but it also ensures the spatiotemporal regulation of cell functions, because the signal encoding can be realized via amplitude- and frequency-modulated oscillations in cytosolic calcium concentration.
Starting Page	249
Ending Page	270
Page Count	22
File Format	PDF
ISSN	10214437
Journal	Russian Journal of Plant Physiology
Volume Number	52
Issue Number	2
e-ISSN	16083407
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2005-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Calcium Ca$^{2+}$-channels Ca$^{2+}$-ATPases Ca$^{2+}$/H$^{+}$ antiporters Ca$^{2+}$-binding proteins calmodulin Ca$^{2+}$-dependent protein kinases calcium spikes, waves, and oscillations signal transduction Plant Sciences Plant Physiology
Content Type	Text
Resource Type	Book Review
Subject	Plant Science

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