Bioluminescence In Biology - can
Play media Huge numbers of bioluminescent dinoflagellates creating phosphorescence in breaking waves Bioluminescence occurs widely among animals, especially in the open sea, including fish , jellyfish , comb jellies , crustaceans , and cephalopod molluscs; in some fungi and bacteria ; and in various terrestrial invertebrates including insects. However, some loose-jawed fish emit red and infrared light, and the genus Tomopteris emits yellow light. At least 18 genera exhibit luminosity. These organisms participate in diurnal vertical migration from the dark depths to the surface at night, dispersing the population of bioluminescent organisms across the pelagic water column. The dispersal of bioluminescence across different depths in the pelagic zone has been attributed to the selection pressures imposed by predation and the lack of places to hide in the open sea. In depths where sunlight never penetrates, often below m, the significance of bioluminescent is evident in the retainment of functional eyes for organisms to detect bioluminescence. However, there are occasions where bioluminescence is produced by bacterial symbionts that have a symbiotic relationship with the host organism. Although many luminous bacteria in the marine environment are free-living, a majority are found in symbiotic relationships that involve fish, squids, crustaceans etc. Most luminous bacterial inhabit the marine sea, with Photobacterium and Vibrio genera dominating the marine environment. Hosts obtain these bacterial symbionts either from the environment, spawning , or the luminous bacterium is evolving with their host.Version: Bioluminescence In Biology
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Show full item record Abstract Traditional animal models for human African trypanosomiasis rely on detecting Trypanosoma brucei brucei parasitemia in the blood. Testing the efficacy of new compounds in these models is cumbersome because it may take several months after treatment before surviving parasites become detectable in the blood.
To expedite compound screening, we have used a Trypanosoma brucei brucei GVR35 strain expressing red-shifted firefly luciferase to monitor parasite distribution in infected mice through noninvasive wholebody bioluminescence imaging. This protocol describes the infection and in vivo bioluminescence imaging of mice to assess compound efficacy against T.]
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