Category: Symbiosis
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Aliivibrio fischeri (aka Vibrio fischeri), a bioluminescent bacteria and a glowing squid
Aliivibrio fischeri (also called Vibrio fischeri) is a Gram-negative, rod-shaped bacterium found globally in marine environments. This species has bioluminescent properties, and is found predominantly in symbiosis with various marine animals, such as the Hawaiian bobtail squid. It is heterotrophic, oxidase-positive, and motile by means of a single polar flagella. Free-living A. fischeri cells survive on decaying organic matter. The bacterium is a key research organism for examination of microbial bioluminescence, quorum sensing, and bacterial-animal symbiosis. It is named…
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Tracheal cytotoxin (TCT) is a soluble piece of peptidoglycan (PGN) found in the cell wall of all gram-negative bacteria, but only some bacteria species release TCT including Bordetella pertussis, Vibrio fischeri, and Neisseria gonorrhoeae
Tracheal cytotoxin (TCT) is a 921 dalton glycopeptide released by Bordetella pertussis, Vibrio fischeri (as a symbiosis chemical), and Neisseria gonorrhoeae (among other peptidoglycan-derived cytotoxins it produces). It is a soluble piece of peptidoglycan (PGN) found in the cell wall of all gram-negative bacteria, but only some bacteria species release TCT due to inability to recycle this piece of anhydromuropeptide. History In 1980, it was discovered that B. pertussis could attach to hamster tracheal epithelial (HTE) cells, and also, that…
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Plutus opal butterflies and black cocktail ants
Chrysoritis plutus, the Plutus opal, is a butterfly of the family Lycaenidae found only in South Africa. The wingspan is 24–28 mm for males and 26–35 mm for females. Flight period is two broods from August to December and January to April. Larvae feed on the Thesium species. Thesium is a genus of flowering plants in the family Santalaceae, sandalwoods, a widely distributed family of flowering plants (including small trees, shrubs, perennial herbs, and epiphytic climbers) which,…
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The Ant and The Grasshopper – Fable and Counter-fable
The Ant and the Grasshopper, alternatively titled The Grasshopper and the Ant (or Ants), is one of Aesop’s Fables, numbered 373 in the Perry Index. The fable describes how a hungry grasshopper begs for food from an ant when winter comes and is refused. The situation sums up moral lessons about the virtues of hard work and planning for the future.…
