Signal Propagation during Aggregation in the Slime Mould Dictyostelium discoideum
نویسندگان
چکیده
منابع مشابه
Spatial pattern formation during aggregation of the slime mould Dictyostelium discoideum.
Stream formation and spiral wave behaviour during the aggregation of Dictyostelium discoideum (Dd) are studied in a model based on the Martiel-Goldbeter equations for cAMP relay, combined with chemotactic motion of Dd cells. The results show that stream formation occurs if the turnover rate of intracellular cAMP is increased. This increase in the turnover rate of cAMP[in] leads to a dependence ...
متن کاملA genetic study of aggregation in the cellular slime mould Dictyostelium discoideum using complementation analysis.
A series of aggregation-deficient (aggregateless) mutants were isolated in genetically marked haploid strains of the cellular slime mould Dictyostelium discoideum. Diploids were produced from pairs of such haploid mutants by a fusion system based on this organism's parasexual cycle. The diploids were isolated from the haploids by using complementation of non-allelic growth-temperature-sensitive...
متن کاملAnalysis of optical density wave propagation and cell movement in the cellular slime mould Dictyostelium discoideum
We have studied optical density wave propagation during aggregation of the cellular slime mould Dictyostelium discoideum in a quantitative manner by digital image analysis. The waves arc mostly single ended spiral waves starting from an aggregation center. We can measure a variety of parameters such as oscillation frequency, wave propagation velocity and wave shape. This allows the construction...
متن کاملCell density dependence of the aggregation characteristics of the cellular slime mould Dictyostelium discoideum.
We have measured fruiting body density and spore formation efficiency in Dictyostelium discoideum as functions of initial cell density. Experiments were performed on agar made up with distilled water and on buffered agar. Minor differences are seen; these are discussed. The functions show 4 regions of density dependence which can be accounted for by changes in aggregation characteristics with d...
متن کاملInhibition of aggregation of the slime mould Dictyostelium discoideum by a factor diffusing from Escherichia coli.
A factor diffuses from Escherichia colt that temporarily or permanently prevents separate pre-aggregation cells of Dictyostelium discoideum from forming aggregation centres or streams. Centres are inhibited at a greater distance from the bacteria than are streams. The inhibitor does not support the slime-mould's growth, and it has different properties from previously discovered aggregation-cent...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1974
ISSN: 0022-1287
DOI: 10.1099/00221287-85-2-321