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Salicylic acid produced by the rhizobacterium Pseudomonas aeruginosa 7NSK2 induces resistance to leaf infection by Botrytis cinerea on bean

Geert De Meyer (UGent) and Monica Höfte (UGent)
(1997) PHYTOPATHOLOGY. 87(6). p.588-593
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Abstract
Selected strains of nonpathogenic rhizobacteria can induce a systemic resistance in plants that is effective against various pathogens. In an assay with bean plants, we investigated which determinants of the rhizobacterium Pseudomonas aeruginosa 7NSK2 are important for induction of resistance to Botrytis cinerea. By varying the iron nutritional state of the bacterium at inoculation, it was demonstrated that induced resistance by P. aeruginosa 7NSK2 was iron-regulated. As P. aeruginosa 7NSK2 produces three siderophores under iron limitation, pyoverdin, pyochelin, and salicylic acid, we investigated the involvement of these iron-regulated metabolites in induced resistance by using mutants deficient in one or more siderophores. Results demonstrated that salicylic acid production was essential for induction of resistance to B. cinerea by Fl aeruginosa 7NSK2 in bean and did not exclude a role for pyochelin. A role for pyoverdin, however, could not be demonstrated. Transcriptional activity of salicylic acid and pyochelin biosynthetic genes was detected during P. aeruginosa 7NSK2 colonization of bean. Moreover, the iron nutritional state at inoculation influenced the transcriptional activity of salicylic acid and pyochelin biosynthetic genes in the same way as it influenced induction of systemic resistance to B. cinerea.
Keywords
induced systemic resistance, Phaseolus vulgaris, plant growth-promoting rhizobacteria, reporter gene, SP STRAIN WCS417R, SYSTEMIC RESISTANCE, FUSARIUM-WILT, ACQUIRED-RESISTANCE, DISEASE RESISTANCE, RHIZOSPHERE, FLUORESCENS, INDUCTION, BACTERIA, TOBACCO

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Chicago
De Meyer, Geert, and Monica Höfte. 1997. “Salicylic Acid Produced by the Rhizobacterium Pseudomonas Aeruginosa 7NSK2 Induces Resistance to Leaf Infection by Botrytis Cinerea on Bean.” Phytopathology 87 (6): 588–593.
APA
De Meyer, Geert, & Höfte, M. (1997). Salicylic acid produced by the rhizobacterium Pseudomonas aeruginosa 7NSK2 induces resistance to leaf infection by Botrytis cinerea on bean. PHYTOPATHOLOGY, 87(6), 588–593.
Vancouver
1.
De Meyer G, Höfte M. Salicylic acid produced by the rhizobacterium Pseudomonas aeruginosa 7NSK2 induces resistance to leaf infection by Botrytis cinerea on bean. PHYTOPATHOLOGY. 1997;87(6):588–93.
MLA
De Meyer, Geert, and Monica Höfte. “Salicylic Acid Produced by the Rhizobacterium Pseudomonas Aeruginosa 7NSK2 Induces Resistance to Leaf Infection by Botrytis Cinerea on Bean.” PHYTOPATHOLOGY 87.6 (1997): 588–593. Print.
@article{184429,
  abstract     = {Selected strains of nonpathogenic rhizobacteria can induce a systemic resistance in plants that is effective against various pathogens. In an assay with bean plants, we investigated which determinants of the rhizobacterium Pseudomonas aeruginosa 7NSK2 are important for induction of resistance to Botrytis cinerea. By varying the iron nutritional state of the bacterium at inoculation, it was demonstrated that induced resistance by P. aeruginosa 7NSK2 was iron-regulated. As P. aeruginosa 7NSK2 produces three siderophores under iron limitation, pyoverdin, pyochelin, and salicylic acid, we investigated the involvement of these iron-regulated metabolites in induced resistance by using mutants deficient in one or more siderophores. Results demonstrated that salicylic acid production was essential for induction of resistance to B. cinerea by Fl aeruginosa 7NSK2 in bean and did not exclude a role for pyochelin. A role for pyoverdin, however, could not be demonstrated. Transcriptional activity of salicylic acid and pyochelin biosynthetic genes was detected during P. aeruginosa 7NSK2 colonization of bean. Moreover, the iron nutritional state at inoculation influenced the transcriptional activity of salicylic acid and pyochelin biosynthetic genes in the same way as it influenced induction of systemic resistance to B. cinerea.},
  author       = {De Meyer, Geert and H{\"o}fte, Monica},
  issn         = {0031-949X},
  journal      = {PHYTOPATHOLOGY},
  keyword      = {induced systemic resistance,Phaseolus vulgaris,plant growth-promoting rhizobacteria,reporter gene,SP STRAIN WCS417R,SYSTEMIC RESISTANCE,FUSARIUM-WILT,ACQUIRED-RESISTANCE,DISEASE RESISTANCE,RHIZOSPHERE,FLUORESCENS,INDUCTION,BACTERIA,TOBACCO},
  language     = {eng},
  number       = {6},
  pages        = {588--593},
  title        = {Salicylic acid produced by the rhizobacterium Pseudomonas aeruginosa 7NSK2 induces resistance to leaf infection by Botrytis cinerea on bean},
  url          = {http://dx.doi.org/10.1094/PHYTO.1997.87.6.588},
  volume       = {87},
  year         = {1997},
}

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