The mating-type substances of Paramecium bursaria
نویسندگان
چکیده
منابع مشابه
The Genic Control of Mating Types in Paramecium Bursaria.
Jennings"l discovery of a system of multiple mating types in Paramecium bursaria in 1938 followed closely Sonneborn's2 initial description of mating types in P. aurelia. The detailed and brilliant experimental analyses carried out by Jennings3 and directed toward an understanding of mating type inheritance and determination in this organism did not result in a satisfactory explanation for the v...
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....
متن کاملGenetics of Paramecium Bursaria. I. Mating Types and Groups, Their Interrelations and Distribution; Mating Behavior and Self Sterility.
ARAMECIUM bursaria is one of the most widely distributed of P the species of Paramecium, though it does not as a rule occur in such large numbers in a given region as does sometimes Paramecium caudatum. It occurs commonly amid growing vegetation in the quiet parts of pools, ponds or streams. It does not flourish in regions in which the water is foul or there is much decaying vegetation. ’ The s...
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ژورنال
عنوان ژورنال: Genetical Research
سال: 1963
ISSN: 0016-6723,1469-5073
DOI: 10.1017/s0016672300003487