Effects of Mg2+ and Ca2+ on photoinduced Euglena flagellar responses.
The flagellar frequency and waveform of Euglena were analyzed under full illumination (420-700 nm) and in a restricted wavelength band (530-700 nm) when the cells were in a medium containing Mg2+ or had been microinjected with Mg2+, Mn2+, or Ca2+ in solution. Magnesium abolished the change in flagellar frequency and the reversal in waveform that cells exhibit when illuminated by a 530-700 nm wavelength band. Under this restricted illumination, Ca2+ caused an increase in flagellar waveform reversal and a decrease in beating frequency. The flagellar motility of cells impaled on a microelectrode was examined in cells illuminated with various wavelengths.
D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D005055:Euglena / Q000528:radiation effects; D005056:Euglena gracilis / Q000187:drug effects* / Q000502:physiology; D005407:Flagella / Q000187:drug effects* / Q000502:physiology / Q000528:radiation effects; D008027:Light; D008274:Magnesium / Q000494:pharmacology*; D009068:Movement / Q000187:drug effects
D008274:Magnesium; D002118:Calcium