MATING TYPES IN DIVERSE RACES OF PARAMECIUM CAUDATUM
نویسندگان
چکیده
منابع مشابه
Determination and inheritance of mating type in Paramecium caudatum.
M A T I N G type determination and inheritance in Paramecium caudatum has been reported only for syngen 12 (HIWATASHI 1958). Inheritance was usually synclonal, i.e. the two clones derived from the two members of a conjugating pair are identical in mating type expression, indicating direct genic control of mating type. However the breeding analysis was incomplete and some of the observations, as...
متن کاملMating-reactive membrane vesicles from cilia of Paramecium caudatum
Membrane vesicles with a high mating reactivity were obtained from cilia of Paramecium caudatum by treatment with a solution containing 2 M urea and 0.1 mM Na2-EDTA. All processes of conjugation were induced in cells of the complementary mating type by approximately 10 mug/ml proteins of the vesicles. Electron microscope observation showed that the membrane vesicles have a diameter of 100-150 n...
متن کاملBehavioral Mutants in PARAMECIUM CAUDATUM.
Mutants of Paramecium caudatum with abnormal swimming behavior or responses to cations were obtained by mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine. Some of the mutants, like pawn in P. tetraurelia, cannot swim backward and are called CNR. Seven independently obtained CNR mutants belonged to three complementation groups, designated as cnrA, cnrB and cnrC. Some characteristics of doubl...
متن کاملThe structure of trichocysts in Paramecium caudatum.
The structure of undischarged and discharged trichocysts has been examined in Paramecium caudatum, and their light-microscopic appearance compared with their fine-structural organization. In living specimens undischarged trichocysts appear to be of a single type with a unimodal variation in length about a mean of 37 fim. When fixed for electron microscopy or compressed beneath a coverslip many ...
متن کاملThe 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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1941
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1537724