Increase in proteinase activity in the cellular slime mould Polysphondylium pallidum induced by bacteria
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چکیده
منابع مشابه
Spots and stripes: the patterning spectrum in the cellular slime mould Polysphondylium pallidum
Whorls of the cellular slime mould Polysphondylium pallidum originate as spherical cell masses that during normal morphogenesis produce tips only at equidistant positions around their equator. We have observed a series of new patterns in whorls that differ from normal whorls only in that they are larger or more elongated. Among the novel patterns found were arrays of tips distributed fairly reg...
متن کاملUltrastructural changes during formation and germination of microcysts in Polysphondylium pallidum, a cellular slime mould.
Ultrastructural changes during encystation of Polysphondylium palltdum, a cellular slime mould, include an increase in fibnllar material in the cytoplasmic matrix, the formation of cytoplasms microprojections at the cell periphery and the occurrence of tiny vesicles and some larger vacuoles near the cell periphery. The cyst wall appears first as a fluffy, loose network of fibrils. In the mature...
متن کاملSpatial patterns in the fruiting bodies of the cellular slime mold Polysphondylium pallidum.
During morphogenesis in the slime mold Polysphondylium pallidum cell masses are periodically pinched off from the base of the developing sorogen. These masses round up and differentiate into secondary sorogens, which become radially ordered arrays of secondary fruiting bodies called whorls. Here we describe the morphogenesis of P. pallidum and characterize the spacing of whorls along the centra...
متن کاملPhagocytosis by the Cellular Slime Mold Polysphondylium Pallidum during Growth and Development
The phagocytic ability of amoebae of the cellular slime mold Polysphondylium pallidum, grown in shaken suspension, was examined. An established quantitative assay of the uptake of polystyrene (PS) beads was shown to be valid for this organism. The kinetics of phagocytosis were determined, and estimates of the concentration of PS beads necessary to achieve half-maximal phagocytic velocity (K(p))...
متن کاملAlpha-mannosidase and microcyst differentiation in the cellular slime mold Polysphondylium pallidum.
The intracellular and extracellular pattern of alpha-mannosidase (EC 3.2.1.24) activity was studied during microcyst differentiation in the cellular slime mold, Polysphondylium pallidum. The evidence suggests that microcyst differentiation requires continuous protein synthesis. alpha-Mannosidase activity is present in amoebae and increases with differentiation, and the data indicate that this i...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1984
ISSN: 0378-1097
DOI: 10.1016/0378-1097(84)90290-8