Change in properties of Physarum polycephalum amoebae during extended culture.
نویسندگان
چکیده
During two years of passage, several myxamoebal strains of Physarum polycephalum changed with regard to their properties in crosses and plaque morphology. These changes have been correlated with increased nuclear deoxyribonucleic acid content.
منابع مشابه
A Gene, ALCA, Affecting the Life Cycle Form Expressed in PHYSARUM POLYCEPHALUM.
The usual sequence of forms in the Physarum polycephalum life cycle is plasmodium-spore-amoeba-plasmodium. So-called "amoebaless life cycle" or alc mutants of this Myxomycete undergo a simplified plasmodium-spore-plasmodium life cycle. We have analyzed three independently isolated alc mutants and found in each case that the failure of the spores to give rise to amoebae is due to a recessive Men...
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Amoebae of the Colonia (CL) strain, which normally produce plasmodia in clones, are shown to cross with mt3 and mt4 amoebae under appropriate conditions. Strains carrying mt3 and mt4 in a CL genetic background were constructed and used in the genetic analysis of mutants isolated in CL.
متن کاملComplementation of Amoebal-Plasmodial Transition Mutants in PHYSARUM POLYCEPHALUM.
Amoebae of the Myxomycete Physarum polycephalum differentiate to yield plasmodia in two ways: in crossing, haploid amoebae of appropriate genotypes fuse to form diploid plasmodia; in selfing, plasmodia form without amoebal fusion or increase in ploidy. Amoebae carrying the mating-type allele matAh (formerly mt(h)) self efficiently, but occasionally give rise to mutants that self at very low fre...
متن کاملNuclear DNA content and chromosome numbers throughout the life cycle of the Colonia strain of the myxomycete, Physarum polycephalum.
Nuclear DNA content and ploidy have been determined at different stages of the life cycle of the Colonia strain of the myxomycete Physarum polycephalum. Analyses at the plasmodial stage showed that (a) Burton and Fuelgen DNA analyses agreed within 15% with strains which ranged from 0-6 to 3-6 pg of DNA per nucleus; (b) S-phase in Colonia is during the early part of interphase as in the Wisconsi...
متن کاملAmoebae anticipate periodic events.
When plasmodia of the true slime mold Physarum were exposed to unfavorable conditions presented as three consecutive pulses at constant intervals, they reduced their locomotive speed in response to each episode. When the plasmodia were subsequently subjected to favorable conditions, they spontaneously reduced their locomotive speed at the time when the next unfavorable episode would have occurr...
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ورودعنوان ژورنال:
- Journal of bacteriology
دوره 120 1 شماره
صفحات -
تاریخ انتشار 1974