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wangdandelia

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Host specialization could have been by selection of biovars (different symbiotic specificities a single bacterial lineage may harbor) (Bena et al., 2005). The discovery of two new biovars of S. meliloti, one capable of efficiently nodulating Medicago laciniata (Villegas et al., 2006) and the other Phaseolus (Mnasri et al., 2007), suggests that it is the biovars and not the chromosomal lineages that coevolve with hosts,but further research is needed to support this proposal.
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biovars ºÍ chromosomal lineages ÓÐÊ²Ã´Çø±ðÄØ£¿

[ Last edited by wangdandelia on 2011-3-3 at 21:09 ]
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biovars ºÃÏñÊDZäÖÖµÄÒâ˼¡£A biovar is a variant prokaryotic strain that differs physiologically and/or biochemically from other strains in a particular species.

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The world is a fine place and worth fighting for. I agree with the second part.
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wangdandelia

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Originally posted by brightfuture01 at 2011-03-03 21:44:11:
biovars ºÃÏñÊDZäÖÖµÄÒâ˼¡£A biovar is a variant prokaryotic strain that differs physiologically and/or biochemically from other strains in a particular species.

chromosomal lineages  ÎÒ²»ÏþµÃɶÒâ ...

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ÍÆ¼ö¿´¿´Symbiovars in rhizobia reflect bacterial adaptation to legumes
Once the familiar turns strange,it's never quite the same again
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