Jan, 2005
Possible involvement of mechanosensitive Ca2+ channels of plasma membrane in mechanoperception in Chara
PLANT AND CELL PHYSIOLOGY
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- Volume
- 46
- Number
- 1
- First page
- 130
- Last page
- 135
- Language
- English
- Publishing type
- DOI
- 10.1093/pcp/pci004
- Publisher
- OXFORD UNIV PRESS
When an internodal cell of Chara corallina was stimulated with a mechanical pulse of various amplitudes lasting for 0.1 s (mechanical stimulus), the cell generated a receptor potential, which was highly dependent not only on the strength of the stimulus but also on the extracellular Cl- concentration. Extracellular Ca2+ was indispensable for generating receptor potential, since removal of Ca2+ reversibly inhibited generation of the receptor potential. The cytoplasmic Ca2+ level transiently rose upon mechanical stimulation. The stronger the mechanical stimulus, the larger was the increase in the cytoplasmic level of Ca2+. It is proposed that the first step of receptor potential is an activation of mechanosensitive Ca2+ channels at the plasma membrane.
- Link information
- ID information
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- DOI : 10.1093/pcp/pci004
- ISSN : 0032-0781
- Web of Science ID : WOS:000226807600013