Document Detail

Contribution of rpfB to Cell-cell Signal Synthesis, Virulence, and Vector Transmission of Xylella fastidiosa.
MedLine Citation:
PMID:  22204646     Owner:  NLM     Status:  Publisher    
In Xylella fastidiosa the fatty acid signal molecule DSF is produced and sensed by components of the regulation of pathogenicity factors (rpf) cluster; lack of DSF production in RpfF mutants results in a non-vector transmissible phenotype yet cells are hypervirulent to grape. rpfB has not been characterized in X. fastidiosa, although its homolog has been suggested to be required for DSF synthesis in Xanthomonas campestris pv. campestris. We show that RpfB is involved in DSF processing in both X. fastidiosa and X. campestris, affecting the profile of DSF-like fatty acids observed in thin-layer chromatography. While three fatty acids whose production is dependent on RpfF were detected in X. fastidiosa and X. campestris wild type strains, their respective rpfB mutants accumulated primarily one chemical species. Although no quantifiable effect of rpfB on plant colonization by X. fastidiosa was found, insect colonization and transmission was reduced. RpfB thus apparently is involved in DSF processing, and like X. campestris, X. fastidiosa also produces multiple DSF molecules. It is possible that X. fastidiosa coordinates host vector and plant colonization by varying the proportions of different forms of DSF signals via RpfB.
Rodrigo P P Almeida; Nabil Killiny; Karyn L Newman; Subhadeep Chatterjee; Michael Ionescu; Steven Lindow
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-28
Journal Detail:
Title:  Molecular plant-microbe interactions : MPMI     Volume:  -     ISSN:  0894-0282     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9107902     Medline TA:  Mol Plant Microbe Interact     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
University of California, Environmental Science, Policy and Management, 130 Mulford, Berkeley, California, United States, 94720;
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