منابع مشابه
Cortical Ultrastructure of Paramecium Aurelia
Two methods have been devised for the isolation of large quantities of purified pellicles (cortical layers) of Paramecium aurelia. Pellicles isolated by both procedures, when examined by electron microscopy, were found to contain ciliary basal bodies, two types of cortical membranes, ribbons of microtubules, kinetodesmal fibers, and elements of the infraciliary lattice system. By electron micro...
متن کاملThe classes of endosymbiont of Paramecium aurelia.
The endosymbionts of Paramecium aurelia appear to consist of a number of different Gramnegative bacteria which have come to live within many strains of paramecia. It is not known whether in nature this relationship is mutually beneficial or not. The symbionts from one paramecium may kill other paramecia lacking that kind of symbiont. We identify the following classes of endosymbiotic organisms....
متن کاملThe classes of kappa in Paramecium aurelia.
Kappas (bacterial symbionts containing R bodies) have been studied in 16 strains of Paramecium aurelia, syngens 2 and 4. All produce toxins capable of killing sensitive paramecia. The first major class, the 51 group (consisting of the kappas of strains 51, 116, and 298), has R bodies which, when the pH is lowered below 6-5, unwind reversibly from the inside to form a tight tube; the outside end...
متن کاملAn Exception to Mutual Exclusion of the Ciliary Antigens in Paramecium Aurelia.
HE system of ciliary antigens of Paramecium aurelia has provided abundant T material for the study of the inheritance of diverse phenotypes by organisms of identical genotype. Each animal of any one stock of P. aurelia has the genetic potential for the expression of a series of serologically different alternative ciliary antigens (SONNEBORN 1948, 1950a; SONNEBORN and LESUER 1948; BEALE 1954). S...
متن کاملFine Structure of Kappa in Paramecium aurelia
P. aurdia, variety 4, stock 31 killer, mating type VII (51-TK), and the identical organism without kappa, stock 51 sensitive (51.7 S), were grown at 27°C. in a volume of timothy hay infusion inoculated with Aerobacter aerogcne.s; this medium supported two fissions per day. Standard procedures were used to fix, embed, and section the paramecia. In brief, concentrated organisms were fixed by the ...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1956
ISSN: 0022-1287
DOI: 10.1099/00221287-15-3-617