You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
A Novel Type of Mechanoreception By the Flagella of Chlamydomonas
Contributor:
Yoshimura, Kenjiro
Published:
The Company of Biologists, 1996
Published in:
Journal of Experimental Biology, 199 (1996) 2, Seite 295-302
Language:
English
DOI:
10.1242/jeb.199.2.295
ISSN:
0022-0949;
1477-9145
Origination:
Footnote:
Description:
<jats:title>ABSTRACT</jats:title>
<jats:p>A novel type of mechanosensory mechanism is found in Chlamydomonas reinhardtii. When a cell is captured with a suction pipette and a negative pressure is applied, the cell produces repetitive Ca2+ impulses at a frequency of 0.5–1.0 Hz. The impulse frequency increases with the applied pressure. The impulses are produced when the flagella are sucked into the pipette but not when the cell body is sucked in leaving the flagella outside the pipette. Cells with short flagella produce impulses of small amplitude. Thus, the site where the cell senses mechanical stimuli and generates the impulse current must be localized at the flagella. The amplitude, shape and ion selectivity of the pressure-induced impulses are distinct from the all-or-none flagellar current that is evoked by photostimulation. The impulses are possibly produced by a combination of currents passing through mechanosensitive channels and Ca2+ channels. This response probably functions to modulate flagellar beating and thereby to regulate the behaviour of the cell.</jats:p>