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Title

Different, overlapping mechanisms for colonization of abiotic and plant surfaces by Pseudomonas putida

AuthorsYousef-Coronado, Fátima; Travieso, María L.; Espinosa-Urgel, Manuel CSIC ORCID
KeywordsPseudomonas putida
Biofilms
Rhizosphere
Spermosphere
Adhesion
Issue Date9-Sep-2008
PublisherJohn Wiley & Sons
CitationFEMS Microbiol Lett. 288(1): 118-124 (2008)
AbstractMechanisms governing biofilm formation have generated considerable interest in recent years, yet comparative analyses of processes for bacterial establishment on abiotic and biotic surfaces are still limited. In this report we have expanded previous information on the genetic determinants required for colonization of plant surfaces by Pseudomonas putida populations and analyzed their correlation with biofilm formation processes on abiotic surfaces. Insertional mutations affecting flagellar genes or the synthesis and transport of the large adhesin LapA lead to decreased adhesion to seeds and biofilm formation on abiotic surfaces. The latter also causes reduced fitness in the rhizosphere. Decreased seed adhesion and altered biofilm formation kinetics are observed in mutants affected in heme biosynthesis and a gene that might participate in oxidative stress responses, whereas a mutant in a gene involved in cytochrome oxidase assembly is affected in the bacterium-plant interaction but not in bacterial establishment on abiotic surfaces. Finally, a mutant altered in lipopolysaccharide biosynthesis is impaired in seed and root colonization but seems to initiate attachment to plastic faster than the wild type. This variety of phenotypes reflects the complexity of bacterial adaptation to sessile life, and the partial overlap between mechanisms leading to biofilm formation on abiotic and biotic surfaces.
Description7 pages.-- The definitive version is available at www.blackwell-synergy.com
Publisher version (URL)http://dx.doi.org/10.1111/j.1574-6968.2008.01339.x
URIhttp://hdl.handle.net/10261/7576
DOI10.1111/j.1574-6968.2008.01339.x
ISSN0378-1097
E-ISSN1574-6968
Appears in Collections:(EEZ) Artículos

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