Patch-clamp study of vascular plant chloroplasts: ion channels and photocurrents.
This article presents direct measurements of large-conductance cation channel (G = 730 pS in 100/50 mM KCl; PK+/PCl- = 2.8) and light-induced current (photocurrent) in chloroplasts from C4 plants, Amaranthus hybridus and Zea mays, using the conventional patch-clamp technique. It was shown that preillumination of chloroplast gave rise to a fast decaying transient (tau approximately equal to 6 ms) in the light-induced current for the second and following light pulses. This transient increase of photocurrent was interpreted as a consequence of photoreducing of the redox pool between photosystems.
Muñiz
J J
JJ
Biomedical Research Center, University of Colima, Col., Mexico.
Pottosin
I I
II
Sandoval
L
L
D002736:Chloroplasts / Q000378:metabolism* / Q000528:radiation effects; D003624:Darkness; D004579:Electron Transport; D007473:Ion Channels / Q000378:metabolism* / Q000528:radiation effects; D007700:Kinetics; D008027:Light; D010084:Oxidation-Reduction; D018462:Photobiology; D010788:Photosynthesis; D003313:Zea mays
D007473:Ion Channels