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Willow wood sap promotes the density-dependent pathogenesis of Brenneria salicis

Hanneke Huvenne (UGent) , Eric Messens (UGent) and Martine Maes
(2009) ENVIRONMENTAL MICROBIOLOGY. 11(6). p.1463-1472
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Abstract
Brenneria salicis resides in symptomless willow (Salix spp.) and other tree species, but only willow trees develop watermark disease. To understand the conversion of B. salicis into a pathogen, its pathogenicity and differential growth in the various tree species are studied. Brenneria salicis was detected by plating and polymerase chain reaction-based techniques. Cell wall degradation and quorum sensing (QS) were assayed as possible pathogenicity mechanisms in wood. Differences in B. salicis growth capacities were tested in wood sap of the trees. Watermark diseased willow wood contained high oncentrations of B. salicis with QS-induced cellulase activity. In the fall, wood sap of willow, and not of poplar and alder, promoted high density growth of B. salicis. In situ, B. salicis was the dominant bacterial type in willow wood during the fall and winter period. Willow sustains high densities of B. salicis at the time of leaf shedding. The cellulase in the immobilized wood sap has then a long-lasting contact with the xylem cell wall. Timing of dormancy and subsequent winter conditions might interfere with sap composition, B. salicis density, activity and survival, and be the reason, at least partly, for the variable occurrence of the disease.
Keywords
XYLELLA-FASTIDIOSA, ERWINIA-SALICIS, SENSING SIGNAL, WHITE WILLOW, SYMPTOMS, BACTERIUM, CRICKET BAT WILLOWS, WATERMARK DISEASE

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Citation

Please use this url to cite or link to this publication:

Chicago
Huvenne, Hanneke, Eric Messens, and Martine Maes. 2009. “Willow Wood Sap Promotes the Density-dependent Pathogenesis of Brenneria Salicis.” Environmental Microbiology 11 (6): 1463–1472.
APA
Huvenne, H., Messens, E., & Maes, M. (2009). Willow wood sap promotes the density-dependent pathogenesis of Brenneria salicis. ENVIRONMENTAL MICROBIOLOGY, 11(6), 1463–1472.
Vancouver
1.
Huvenne H, Messens E, Maes M. Willow wood sap promotes the density-dependent pathogenesis of Brenneria salicis. ENVIRONMENTAL MICROBIOLOGY. 2009;11(6):1463–72.
MLA
Huvenne, Hanneke, Eric Messens, and Martine Maes. “Willow Wood Sap Promotes the Density-dependent Pathogenesis of Brenneria Salicis.” ENVIRONMENTAL MICROBIOLOGY 11.6 (2009): 1463–1472. Print.
@article{670378,
  abstract     = {Brenneria salicis resides in symptomless willow (Salix spp.) and other tree species, but only willow trees develop watermark disease. To understand the conversion of B. salicis into a pathogen, its pathogenicity and differential growth in the various tree species are studied. Brenneria salicis was detected by plating and polymerase chain reaction-based techniques. Cell wall degradation and quorum sensing (QS) were assayed as possible pathogenicity mechanisms in wood. Differences in B. salicis growth capacities were tested in wood sap of the trees. Watermark diseased willow wood contained high oncentrations of B. salicis with QS-induced cellulase activity. In the fall, wood sap of willow, and not of poplar and alder, promoted high density growth of B. salicis. In situ, B. salicis was the dominant bacterial type in willow wood during the fall and winter period. Willow sustains high densities of B. salicis at the time of leaf shedding. The cellulase in the immobilized wood sap has then a long-lasting contact with the xylem cell wall. Timing of dormancy and subsequent winter conditions might interfere with sap composition, B. salicis density, activity and survival, and be the reason, at least partly, for the variable occurrence of the disease.},
  author       = {Huvenne, Hanneke and Messens, Eric and Maes, Martine},
  issn         = {1462-2912},
  journal      = {ENVIRONMENTAL MICROBIOLOGY},
  language     = {eng},
  number       = {6},
  pages        = {1463--1472},
  title        = {Willow wood sap promotes the density-dependent pathogenesis of Brenneria salicis},
  url          = {http://dx.doi.org/10.1111/j.1462-2920.2009.01874.x},
  volume       = {11},
  year         = {2009},
}

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