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Max-Planck-Institut für molekulare Pflanzenphysiologie Wissenschaftspark Potsdam-Golm Am Mühlenberg 1 14476 Golm b. Potsdam, Germany http://www.mpimp-golm.mpg.de
Contact Ms Claudia Steinert +49 331 5678275
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Max-Planck-Institut für molekulare Pflanzenphysiologie Wissenschaftspark Potsdam-Golm

Stoffwechsel der Maispflanze gehorcht Parasitenproteinen

Pilze können den pflanzlichen Stoffwechsel umlenken und so Abwehrreaktionen ausschalten

(PresseBox) (Golm b. Potsdam, )
Wenn Pflanzen von Parasiten befallen werden, beginnt eine Art Wettrüsten. Die Pflanze versucht schnellstmöglich, Abwehrmoleküle herzustellen, die den Eindringling abtöten oder zumindest in Schach halten. Gleichzeitig versuchen die parasitären Organismen, diese Verteidigungsmechanismen auszuschalten. Ein wichtiger parasitärer Pilz ist Ustilago maydis, der Verursacher des Maisbeulenbrands, der bei der Maispflanze gallenartige Wucherungen hervorrufen kann. Etwa 150 Proteine werden vom Pilz an seine Umgebung abgegeben und sind verantwortlich für die Ernährung des Parasiten, die Zellwandmodifikation und die Penetration des Wirtsgewebes. Eines dieser Proteine - die Chorismat-Mutase - schafft es, den Stoffwechsel der Pflanzenzellen so umzuleiten, dass die Pflanze weniger Salizylsäuren herstellen kann, die gta srg Ykwliljkll moi inwcescijrlp Qwyuapfejsanaho flffejhmvd vmc.

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