Callitriche Stem Elongation is controlled by Ethylene and Gibberellin

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Abstract

Callitriche platycarpa is a freshwater plant characterized by floating rosettes of leaves connected to the water-bed by threadlike (diameter < 1 mm) stems. The internodes within the rosettes are immature and short (< 2 mm). If they mature at the water surface, they become 10 to 30 mm long, but if the rosette is submerged the internodes elongate faster and to a greater extent (25–60 mm). This method of growth rate control is of interest.

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