The permeation of indoleacetic acid through the cuticle of the Avena coleoptile and its effects on the growth and the geotropism
Acta botanica neerlandica , Volume 20 - Issue 3 p. 275- 281
The auxin production by the tip of the Avena coleoptile seems too high for a complete geotropic response (a curvature of 90 °) under the present experimental conditions (weak red light). It is sufficient for a maximum rate of geotropic curvature, but it is too low for a maximum rate of elongation. The entrance of indoleacetic acid through the cuticle is 2500-3000 times as difficult as that via the cut surface of a decapitated Avena coleoptile.
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L. Anker. (1971). The permeation of indoleacetic acid through the cuticle of the Avena coleoptile and its effects on the growth and the geotropism. Acta botanica neerlandica, 20(3), 275–281.
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