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  Localization of phenolics in phloem parenchyma cells of Norway spruce (Picea abies)

Li, S.-H., Nagy, N. E., Hammerbacher, A., Krokene, P., Niu, X.-M., Gershenzon, J., et al. (2012). Localization of phenolics in phloem parenchyma cells of Norway spruce (Picea abies). ChemBioChem: A European Journal of Chemical Biology, 13, 2707-2713. doi:10.1002/cbic.201200547.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0010-0CD7-0 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0009-339C-E
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 Urheber:
Li, S.-H., Autor
Nagy, N. E., Autor
Hammerbacher, Almuth1, 2, Autor           
Krokene, P., Autor
Niu, X.-M., Autor
Gershenzon, Jonathan1, Autor           
Schneider, Bernd3, Autor           
Affiliations:
1Department of Biochemistry, Prof. J. Gershenzon, MPI for Chemical Ecology, Max Planck Society, ou_421893              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              
3Research Group Biosynthesis / NMR, MPI for Chemical Ecology, Max Planck Society, ou_421898              

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 Zusammenfassung: Norway spruce (Picea abies) bark contains specialized phloem parenchyma cells that swell and change their contents upon attack by the bark beetle Ips typographus and its microbial associate, the blue stain fungus Ceratocystis polonica. These cells exhibit bright autofluorescence after treatment with standard aldehyde fixatives, and so have been postulated to contain phenolic compounds. Laser microdissection of spruce bark sections combined with cryogenic NMR spectroscopy demonstrated significantly higher concentrations of the stilbene glucoside astringin in phloem parenchyma cells than in adjacent sieve cells. After infection by C. polonica, the flavonoid (+)‐catechin also appeared in phloem parenchyma cells and there was a decrease in astringin content compared to cells from uninfected trees. Analysis of whole‐bark extracts confirmed the results obtained from the cell extracts and revealed a significant increase in dimeric stilbene glucosides, both astringin and isorhapontin derivatives (piceasides A to H), in fungus‐infected versus uninfected bark that might explain the reduction in stilbene monomers. Phloem parenchyma cells thus appear to be a principal site of phenolic accumulation in spruce bark.

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 Datum: 20122012-11-13
 Publikationsstatus: Online veröffentlicht
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 Identifikatoren: Anderer: NMR195
DOI: 10.1002/cbic.201200547
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Titel: ChemBioChem: A European Journal of Chemical Biology
  Andere : ChemBioChem
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Weinheim, Germany : Wiley-VCH
Seiten: - Band / Heft: 13 Artikelnummer: - Start- / Endseite: 2707 - 2713 Identifikator: ISSN: 1439-4227
CoNE: https://pure.mpg.de/cone/journals/resource/110978984568897_1