2385906
Description
Flashcards by Erfiana Shamsaddin, updated more than 1 year ago
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Created by Erfiana Shamsaddin
over 9 years ago
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| Question | Answer |
| 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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