THE INITIATOR CELL FOR SLIME MOLD AGGREGATION
نویسندگان
چکیده
منابع مشابه
Initiation of slime mold aggregation viewed as an instability.
The chemotactic interaction of amoebae, as mediated by acrasin, is evidenced in a variety of ways, the most dramatic of which is aggregation. In this paper we present a mathematical formulation of the general interaction, and provide a detailed analysis of the aggregation process. By analogy with many problems in the physical world, aggregation is viewed as a breakdown of stability caused by in...
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This video is composed of a sequence of films created by John Tyler Bonner [5] in the 1940s to show the life cycle of the cellular slime mold [6], Dictyostelium discoideum . As only the second person to study slime molds, Bonner frequently encountered audiences who had never heard of, let alone seen, the unusual organism. He therefore decided to create a film to present at seminars in order to ...
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The plasmodium of Physarum polycephalum reacts to direct current by migration toward the cathode. Cathodal migration was obtained upon a variety of substrata such as baked clay, paper, cellophane, and agar with a current density in the substratum of 1.0 microa./mm.(2) Injury was produced by current densities of 8.0 to 12.0 microa./mm.(2) The negative galvanotactic response was not due to electr...
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The myxamebae of the cellular slime mold feed upon bacteria and multiply by fission. As soon as the food supply is exhausted fission ceases. They aggregate and form migrating pseudoplasmodia, then fruit (Bonner, 1959). Huffman and Olive (1964) reported that in Dwtyostehum &s~oideum some cell fusions were observed at tile very early aggregation stages, but they observed no fusion at later stages...
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This paper describes the biological motivation, design and testing of a novel obstacle sensor system based on the chemical sounding mechanism observed in slime molds. The sensor system emits a volatile sounding chemical and adjacent obstacles reduce the dispersion of the chemical. The resulting increase in chemical concentration is detected and interpreted as indicating an obstacle. To demonstr...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1958
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.44.5.401