Abstract
Calcium is one of the most versatile messengers in biological systems, translating developmental andenvironmental cues into cellular responses. The endoplasmic reticulum (ER) constitutes one of themost important calcium holding organelles in higher eukaryotes. Upon stimulation, calcium is released fromthe ER into the cytosol where it may trigger downstream effectors. However, the release of calciummay also affect internal ER functions, such as protein folding and secretion. It is therefore importantnot only to view cytosolic calcium signals as isolated events, but also in context to the organellar calciumstatus. In animals, the calcium levels of the ER can be sensed by other calcium resources, such as theplasma membrane, which may allow calcium uptake or release depending on the overall demand in the cell.In this chapter we have tried to convey the diverse aspects of calcium and its potential impact on differentER processes, and organellar communications, in plants.
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Keywords
- Guard Cell
- Cytosolic Calcium
- Cell Calcium
- Nicotinic Acid Adenine Dinucleotide Phosphate
- Plant Endoplasmic Reticulum
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Acknowledgments
We would like to thank Drs Marianne Sommarin, Wendy F. Boss and Thorsten Hamann for valuable suggestions. SP was a recipient of a Carl Tryggers fellowship (CTS 03:258).
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Persson, S., Harper, J. (2006). The ER and Cell Calcium. In: Robinson, D.G. (eds) The Plant Endoplasmic Reticulum. Plant Cell Monographs, vol 4. Springer, Berlin, Heidelberg. https://doi.org/10.1007/7089_062
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