Feeding Behaviour of Didinium nasutum on Paramecium bursaria with Normal or Apochlorotic Zoochlorellae
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منابع مشابه
Graviresponses in Paramecium Caudatum and Didinium Nasutum Examined under Varied Hypergravity Conditions
The swimming behaviours of two species of ciliates characterized by different mechanosensory and ciliary motor properties were investigated under hypergravity up to 5.4 g. The experiments were designed to examine large numbers of cells using video recording, digital data processing and statistics for the documentation of the rates and orientations of swimming. The gravikinetic responses (change...
متن کاملVoltage-dependence of ciliary activity in the ciliate Didinium nasutum
In the gymnostome ciliate Didinium nasutum, swimming behaviour depends upon the cyclic activity of about 3000 cilia. The normal beating mode, resulting in forward swimming of the cell, is characterized by a posteriad effective beat (18 left of the longitudinal axis) at a frequency of approximately 15 Hz. Activation of depolarization-sensitive ciliary Ca2+ channels leads to an increase in intrac...
متن کاملMicronuclear Variation in Paramecium bursaria
THE dimorphic condition of the nuclear apparatus of the Infusoria is one of the most interesting and characteristic specializations exhibited by the group, apparently representing a segregation of ' somatic' and ' germinal' elements into distinct macronuclei and micronuclei. Accordingly these bodies have been extensively studied during the various life-processes of the Infusoria. Furthermore, s...
متن کاملA Heterocaryon in PARAMECIUM BURSARIA.
M O S T ciliate cells possess a macronucleus and a micronucleus which differ markedly in size and function. Although these differences are stable and heritable, a large body of results has led to the conclusion that the two nuclei are qualitatively isogenic. Crosses in Paramecium buryaria to be discussed here provide direct evidence for the existence of a heterocaryon, an exceptional line in wh...
متن کاملCercadian Change of Photosensiuvity in Paramecium Bursaria
Circadian changes in behaviour and electrical properties of the membrane were investigated in Paramecium bursaria. Both photoaccumulation and swimming velocity were at a higher level during the day than at night. During the day, swimming velocity decreased as light intensity was increased and the cells almost stopped at the intensity at which they showed the maximum degree of photoaccumulation....
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ژورنال
عنوان ژورنال: Microbiology
سال: 1980
ISSN: 1350-0872,1465-2080
DOI: 10.1099/00221287-118-2-397