Zusammenfassung
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1.
Die Blutungssäfte vonLupinus albus, Pisum sativum (var. Alderman) undImpatiens glandulifera erwiesen sich als verhältnismäßig reich an Stoffen, die im Zwergerbsen-Mais-I- und Weizenblatt-Standardtest gibberellinartige Wirkungen erkennen lassen.
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2.
Die Aktivität der unverdünnten und ungereinigten Blutungssäfte wird bei manchen Testen durch die negative Wirkung noch unbekannter Stoffe überdeckt. Es wird vermutet, daß es sich dabei um Inhibitoren handelt, die ihrer Natur nach entweder unspezifisch sein könnten oder aber den Charakter von Antigibberellinen besitzen.
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3.
Die Blutungssäfte vonLupinus undImpatiens wurden in drei pH-Stufen fraktioniert. Die einzelnen Fraktionen (eine neutrale und zwei saure Stufen) wurden durch absteigende Papierchromatographie aufgetrennt. Als Laufmittel diente 1,5 n NH4OH:n-Butanol (1∶3). Im Zwergerbsentest ließen sämtliche Fraktionen eine Reihe von Aktivitätsgipfeln erkennen. Das Chromatogramm der sauren Fraktionen des Lupinensaftes zeigte auch beim Weizenblatt-Test entsprechende Gipfel.
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4.
Die tägliche Gibberellin-Belieferung des sprosses durch die Wurzel genügt völlig zur Deckung des Wachstumsbedarfs seiner Internodien. In diesem Zusammenhang wird die morphogenetische Rolle der Wurzel bei der Entwicklung des Sprosses kurz besprochen.
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Carr, D.J., Reid, D.M. & Skene, K.G.M. The supply of gibberellins from the root to the shoot. Planta 63, 382–392 (1964). https://doi.org/10.1007/BF01885720
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DOI: https://doi.org/10.1007/BF01885720