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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bräucker, R. Machemer-Röhnisch, S. Machemer, H. Murakami, A. |
| Description | Author Affiliation: Bräucker R ( Arbeitsgruppe Zelluläre Erregungsphysiologie, Fakultät für Biologie, Ruhr-Universität, Bochum, FRG.) |
| Abstract | The locomotion of Loxodes as controlled by the natural gravity vector was investigated employing a mass-cell approach. Samples of cells were incubated for 4 hours in a 1.6 mm deep well (41 × 85 mm) filled with defined experimental solution. Their gliding locomotion on surfaces inclined between 0° and 90° was recorded by videocamera. Steady gliding rates (median of total: 206 µm/s; n = 12711) were evaluated by calculating the vertical components from observed tracks. At a given inclination the rates of downward and upward gliding were similar. The sedimentation rate of freely suspended nickel-immobilized specimens (S = 49 µm/s), and vertical rates of displacement at 6 differently inclined planes with cells in 'sitting' posture as well as 'hanging' (upside down) were used to determine the gravity-dependent component (Δ = - 49 µm/s) during gliding motion. Numerical equality of the gravity force to produce S and of the counterforce to produce Δ follows from the observed constancy of gliding rates (V) and identical medians of vertical displacements during gliding along vertically oriented surfaces (169 µm/s). It is suggested that neutralization of sedimentation might be a favourable condition for migration and accumulation of Loxodes along vertical O(2) gradients in its freshwater habitat. |
| File Format | HTM / HTML |
| ISSN | 09324739 |
| Issue Number | 2 |
| Journal | European Journal of Protistology |
| Volume Number | 28 |
| e-ISSN | 16180429 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 1992-05-22 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Microbiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Microbiology |
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