If statoliths are relocated to a vertically growing rhizoid, is the regular longitudinal growth inhibited.
Even though the observations made with Chara are fairly impressive, do they not explain the causal chain in multicellular roots where stimulus perception and gravitropic reaction take place in different cells even separated by other, non-reactive cells.
The findings do stress another point, though: they show that the black box between stimulus perception and reaction can be assembled from different system components.
www.biologie.uni-hamburg.deWenn Statolithen in einem vertikal wachsenden Rhizoid verlagert werden, wird das gleichmäßige longitudinale Wachstum inhibiert.
So eindrucksvoll die Befunde an Chara auch sind, so wenig erklären sie die Kausalkette in mehrzelligen Wurzeln; denn dort finden Reizperzeption und gravitrope Reaktion in unterschiedlichen Zellen statt, die darüber hinaus auch noch durch andere, nicht reaktive Zellen voneinander getrennt sind.
Die Ergebnisse belegen jedoch eine andere Tatsache:
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