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Erstellt von Erfiana Shamsaddin
vor mehr als 9 Jahre
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Frage | Antworten |
MICROBIAL INTERACTION | SYMBIOSIS association of two or more different species of organisms. |
Ectosymbiont | organism located on surface of another organism |
Endosymbiont | organism located within another organism |
Symbiont | physical contact between dissimilar organisms of similar size |
Consortium | hosts that have more than one associated symbiont |
Microorganism-Insect Mutualism | -endosymbiotic microbe provides needed vitamins and amino acids -insect host provides secure habitat and nutrients. |
Protozoan-Termite Relationship | -termite provides food for protozoan -protozoan digests cellulose in wood particles, providing nutrients for termite |
Cooperation | -along with commensalism is a positive, but not obligate, form of symbiosis which involves syntrophic relationships -benefits both organisms in relationship |
Syntrophism | • type of commensalism -growth of one organism depends on growth factors, nutrients, or substrate provided by another organism growing nearby. |
Commensalism | -one organism benefits and the other is neither harmed nor helped |
Examples of Commensalism | Microbial succession during spoilage of milk -fermentative bacteria produce acids that promote growth of acid tolerant species. |
Predation | -among microbes involves a predator species that attacks, usually killing its prey |
Microbial Predators | Bdellovibrio penetrates cell wall, grows outside plasma membrane. |
Parasitism | one organism gains (parasite) and the other is harmed (host) |
Genomic Reduction | • outcome of long-term parasitic relationship -parasite loses unused genomic information |
Ammensalism | negatives impact of one organism on another based on release of a specific compound |
Competition | occurs when two organisms try to acquire or use the same resource |
Two Possible Outcomes of Competition | • one organism dominates – competitive exclusion principal • two organisms share the resource – both survive at lower population levels |
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