Calcium is involved in photomovement of cyanobacterium Synechocystis sp. PCC 6803.
作者： Yoon-Jung Moon , Young Mok Park , Young-Ho Chung , Jong-Soon Choi
DOI: 10.1562/0031-8655(2004)79<114:CIIIPO>2.0.CO;2
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摘要: Abstract The unicellular cyanobacterium Synechocystis sp. PCC 6803 (Syn6803) exhibits photomovement through gliding motility. For a better understanding of in Syn6803, we examined the effects Ca2+ on photoorientation and motility using computer-assisted videomicroscope motion analysis system. When calcium ion was chelated from basic medium by adding 0.5 mM ethylene glycol-bis-(β-aminoethyl ether)-N,N,N′,N′-tetraacetic acid (EGTA), completely inhibited, whereas remained approximately 70% control. Photoorientation impaired EGTA nearly recovered within 30 min upon addition 1 Ca2+. recovery mimicked either Mn2+ or Mg2+ but not Ba2+ Sr2+. Lanthanum at 10 μM inhibited both phototactic orientation Syn6803. Furthermore, pimozide (voltage-gated L-type channel inhibitor), orthovanadate (calcium efflux blocker) A23187 (calciu...
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