Linked Life Data

19340083

Source:http://linkedlifedata.com/resource/pubmed/id/19340083

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2009-6-23
pubmed:abstractText
The success of biocontrol bacteria in soil depends in part on their ability to escape predation. We explored the interactions between Pseudomonas strain DSS73 and two predators, the nematode Caenorhabditis elegans and the flagellate Cercomonas sp. Growth of the nematode in liquid culture was arrested when it was feeding on DSS73 or a DSS73 mutant (DSS73-15C2) unable to produce the biosurfactant amphisin, whereas a regulatory gacS mutant (DSS73-12H8) that produces no exoproducts supported fast growth of the nematode. The flagellate Cercomonas sp. was able to grow on all three strains. The biosurfactant-deficient DSS73 mutant caused severe dilation of the nematode gut. In three-species systems (DSS73, Cercomonas and C. elegans), the nematodes fed on the flagellates, which in turn grazed the bacteria and the number of C. elegans increased. The flagellates Cercomonas sp. usually kill C. elegans. However, DSS73 protected the nematodes from flagellate killing. Soil microcosms inoculated with six rhizobacteria and grazed by nematodes were colonized more efficiently by DSS73 than similar systems grazed by flagellates or without grazers. In conclusion, our results suggest that C. elegans and DSS73 mutually increase the survival of one another in complex multispecies systems and that this interaction depends on the GacS regulator.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1751-7370
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
3
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
770-9
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Functional GacS in Pseudomonas DSS73 prevents digestion by Caenorhabditis elegans and protects the nematode from killer flagellates.
pubmed:affiliation
Genetics and Microbiology, Faculty of Life Science, Department of Agriculture and Ecology, University of Copenhagen, Frederiksberg C, Denmark. lbjornlund@bio.ku.dk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't