Acrasin, the Chemotactic Agent in Cellular Slime Moulds
نویسندگان
چکیده
منابع مشابه
Chemoattractant-mediated changes in cytoskeletal actin of cellular slime moulds.
We report changes in actin associated with the Triton-insoluble cytoskeleton following chemotactic stimulation in five species of cellular slime mould, Dictyostelium discoideum, D. mucoroides, D. purpureum, D. lacteum and Polysphondylium violaceum. Stimulation of amoebae with the chemoattractant specific for each species elicits a rapid increase in cytoskeletal actin content with a peak at 5 s,...
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In laboratory experiments we demonstrate that protoplasmic tubes of acellular slime mould Physarum polycephalum show current versus voltage profiles consistent with memristive systems. This result complements previous findings on memristive properties of other living systems (human skin and blood and leaves) and contributes to development of self-growing bioelectronic circuits.
متن کاملIdentification of a pterin as the acrasin of the cellular slime mold Dictyostelium lacteum.
Cell aggregation in Dictyostelium discoideum is mediated by chemotaxis to cyclic AMP. Aggregative cells of the simpler species D. lacteum are not attracted by this cyclic nucleotide. We describe how the cell aggregation-inducing factor, or acrasin, of D. lacteum was purified from aggregating amoebae and characterized. The acrasin, which is mainly secreted in the aggregative phase, is identified...
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Learning, defined as a change in behaviour evoked by experience, has hitherto been investigated almost exclusively in multicellular neural organisms. Evidence for learning in non-neural multicellular organisms is scant, and only a few unequivocal reports of learning have been described in single-celled organisms. Here we demonstrate habituation, an unmistakable form of learning, in the non-neur...
متن کاملCell mixtures of different species and strains of cellular slime moulds.
INTRODUCTION T H E cellular slime moulds have, in their life history, a period of feeding of separate independent amoebae which subsequently stream together (by a process involving chemotaxis) to central collection points. Each of the resulting cell-masses differentiates into a fruiting body; in most species there is a delicate tapering celluose stalk which surrounds the large vacuolate stalk-c...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1956
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.33.4.645