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Patterns of phenolic compounds in leafy galls of tobacco

(1997) PLANTA. 201(3). p.342-348
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Abstract
The chemical composition of ethanolic and aqueous extracts from leafy galls produced after infection of Nicotiana tabacum L. plants with Rhodococcus fascians was drastically changed compared to uninfected controls. Chlorogenic acid was abundant both in uninfected and infected plants, but caffeic acid and another cinnamoyl analogue were new in leafy galls. The most pronounced product induced in leafy galls was identified as 7-O-methyl-6-O-beta-D-glucopyranosyl coumarin (7-methyl esculin). This is the first report of the presence of this coumarin derivative in tobacco. Interestingly, 7-methyl esculin did not accumulate in the presence of avirulent R. fascians strains nor was it found in leafy galls on other plant species. However, it did appear in crown galls induced by Agrobacterium tumefaciens on tobacco plants. Intriguingly, none of the phenolics known to accumulate in Solanaceae under pathogen attack were found in leafy gaits. 7-Methyl esculin barely affected growth of R. fascians nor was it catabolized. Microscopical analysis showed that autofluorescent compounds were located mainly in the abundant meristematic regions of the leafy galls. We postulate that 7-methyl esculin might locally influence plant cell division.
Keywords
HYDROXYCOUMARINS, IDENTIFICATION, COUMARIN, FRAXINUS-ORNUS, CHEMICAL-SHIFTS, COUPLING-CONSTANTS, ANTIMICROBIAL PROPERTIES, PLANT-DISEASE RESISTANCE, defense response (plants), leafy galls, 7-methyl esculin, Nicotiana, Rhodococcus, ACCUMULATION, GERMINATION

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Chicago
Vereecke, Danny, Eric Messens, Klaus Klarskov, André De Bruyn, Marc Van Montagu, and Koen Goethals. 1997. “Patterns of Phenolic Compounds in Leafy Galls of Tobacco.” Planta 201 (3): 342–348.
APA
Vereecke, D., Messens, E., Klarskov, K., De Bruyn, A., Van Montagu, M., & Goethals, K. (1997). Patterns of phenolic compounds in leafy galls of tobacco. PLANTA, 201(3), 342–348.
Vancouver
1.
Vereecke D, Messens E, Klarskov K, De Bruyn A, Van Montagu M, Goethals K. Patterns of phenolic compounds in leafy galls of tobacco. PLANTA. 1997;201(3):342–8.
MLA
Vereecke, Danny, Eric Messens, Klaus Klarskov, et al. “Patterns of Phenolic Compounds in Leafy Galls of Tobacco.” PLANTA 201.3 (1997): 342–348. Print.
@article{183392,
  abstract     = {The chemical composition of ethanolic and aqueous extracts from leafy galls produced after infection of Nicotiana tabacum L. plants with Rhodococcus fascians was drastically changed compared to uninfected controls. Chlorogenic acid was abundant both in uninfected and infected plants, but caffeic acid and another cinnamoyl analogue were new in leafy galls. The most pronounced product induced in leafy galls was identified as 7-O-methyl-6-O-beta-D-glucopyranosyl coumarin (7-methyl esculin). This is the first report of the presence of this coumarin derivative in tobacco. Interestingly, 7-methyl esculin did not accumulate in the presence of avirulent R. fascians strains nor was it found in leafy galls on other plant species. However, it did appear in crown galls induced by Agrobacterium tumefaciens on tobacco plants. Intriguingly, none of the phenolics known to accumulate in Solanaceae under pathogen attack were found in leafy gaits. 7-Methyl esculin barely affected growth of R. fascians nor was it catabolized. Microscopical analysis showed that autofluorescent compounds were located mainly in the abundant meristematic regions of the leafy galls. We postulate that 7-methyl esculin might locally influence plant cell division.},
  author       = {Vereecke, Danny and Messens, Eric and Klarskov, Klaus and De Bruyn, Andr{\'e} and Van Montagu, Marc and Goethals, Koen},
  issn         = {0032-0935},
  journal      = {PLANTA},
  keyword      = {HYDROXYCOUMARINS,IDENTIFICATION,COUMARIN,FRAXINUS-ORNUS,CHEMICAL-SHIFTS,COUPLING-CONSTANTS,ANTIMICROBIAL PROPERTIES,PLANT-DISEASE RESISTANCE,defense response (plants),leafy galls,7-methyl esculin,Nicotiana,Rhodococcus,ACCUMULATION,GERMINATION},
  language     = {eng},
  number       = {3},
  pages        = {342--348},
  title        = {Patterns of phenolic compounds in leafy galls of tobacco},
  url          = {http://dx.doi.org/10.1007/s004250050076},
  volume       = {201},
  year         = {1997},
}

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