Xanthan induces plant susceptibility by suppressing callose deposition

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Maximina H Yun - , Regeneration komplexer Strukturen bei erwachsenen Wirbeltieren (NFoG), Leloir Institute Foundation, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires (Autor:in)
  • Pablo S Torres - (Autor:in)
  • Mohamed El Oirdi - (Autor:in)
  • Luciano A Rigano - (Autor:in)
  • Rocio Gonzalez-Lamothe - (Autor:in)
  • María Rosa Marano - (Autor:in)
  • Atilio P Castagnaro - (Autor:in)
  • Marcelo A Dankert - (Autor:in)
  • Kamal Bouarab - (Autor:in)
  • Adrián A Vojnov - (Autor:in)

Abstract

Xanthan is the major exopolysaccharide secreted by Xanthomonas spp. Despite its diverse roles in bacterial pathogenesis of plants, little is known about the real implication of this molecule in Xanthomonas pathogenesis. In this study we show that in contrast to Xanthomonas campestris pv campestris strain 8004 (wild type), the xanthan minus mutant (strain 8397) and the mutant strain 8396, which is producing truncated xanthan, fail to cause disease in both Nicotiana benthamiana and Arabidopsis (Arabidopsis thaliana) plants. In contrast to wild type, 8397 and 8396 strains induce callose deposition in N. benthamiana and Arabidopsis plants. Interestingly, treatment with xanthan but not truncated xanthan, suppresses the accumulation of callose and enhances the susceptibility of both N. benthamiana and Arabidopsis plants to 8397 and 8396 mutant strains. Finally, in concordance, we also show that treatment with an inhibitor of callose deposition previous to infection induces susceptibility to 8397 and 8396 strains. Thus, xanthan suppression effect on callose deposition seems to be important for Xanthomonas infectivity.

Details

OriginalspracheEnglisch
Seiten (von - bis)178-187
Seitenumfang10
FachzeitschriftPlant physiology
Jahrgang141
Ausgabenummer1
PublikationsstatusVeröffentlicht - 10 März 2006
Peer-Review-StatusJa

Externe IDs

PubMedCentral PMC1459321
Scopus 33745440281

Schlagworte

Schlagwörter

  • Amino Acid Sequence, Arabidopsis/drug effects, Deoxyglucose/pharmacology, Glucans/metabolism, Necrosis, Plant Leaves/anatomy & histology, Polysaccharides, Bacterial/chemistry, Sequence Deletion, Tobacco/drug effects, Xanthomonas campestris/pathogenicity