Lecture 18 symbioses

Lecture 18 symbioses - Who is there? What is the...

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What are they doing? Who is there? What is the environment like?
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Enrichment is a powerful technique for determining what metabolic capabilities are present in an environment. However, it depends upon the organisms in question being able to grow in the lab. ..there’s a less than 5% chance of this. :(
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What are they doing? Who is there? What is the environment like? What if the environment is alive ?
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Proving that something is being done requires analysis. This chemical analysis and isotopic tracers are useful for this:
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Cells were incubated with 15 N 2 .
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The environment is a host--an example is the symbiosis between Leguminous plants and Rhizobiacea . We can still characterize the environment in the same way.
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Who is there? The leguminacea are a huge group of plants that form nodules with the Rhizobia ; but each different legume will associate with one speciFc species of Rhizobium . P van Rhijn and J Vanderleyden
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What are they doing? The Rhizobium bacteria are in a mutualistic relationship with the legume: the plant provides abundant reduced carbon, while the bacterium produces reduced nitrogen.
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The bacterial genome
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This note was uploaded on 04/05/2011 for the course MIC 102 taught by Professor Appleman during the Fall '08 term at UC Davis.

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Lecture 18 symbioses - Who is there? What is the...

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