Abstract:
:The delta psi of R. sphaeroides, grown under high light to reduce the levels of light-harvesting bacteriochlorophyll, was naturally manipulated using light intensity. The relationship between delta psi and the swimming speed of free swimming populations of cells was investigated. After de-energisation by incubation in the dark there was an apparent threshold of about -13 mV which had to be overcome before functional motor rotation could resume and at -45 mV the motor saturated. Further increases in delta psi over -45 mV did not increase the free swimming velocity. However, when a chemokinetic effector was added there was an increase in swimming speed, even though the delta psi was well above saturation, indicating that the chemokinetic response is independent of normal relationship between motor rotation and delta psi.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Harrison DM,Packer HL,Armitage JPdoi
10.1016/0014-5793(94)00572-9subject
Has Abstractpub_date
1994-07-04 00:00:00pages
37-40issue
1eissn
0014-5793issn
1873-3468pii
0014-5793(94)00572-9journal_volume
348pub_type
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