Early time course and specificity of auxin effects on turgor movement of the bean pulvinus |
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Authors: | K G Krieger |
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Institution: | (1) Institut für Biologie III der Universität, Schänzlestraße 1, D-7800 Freiburg i.Br., Federal Republic of Germany |
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Abstract: | Auxin application to the upper side of the pulvinus of primary leaves of Phaseolus vulgaris L. promoted bending away from the place of application. The effect had a latency of less than 20 min and was specifically induced by substances known as active auxins in growth tests (indoleacetic and 1-naphthaleneacetic acid) but not by inactive auxin analogs (2-naphthaleneacetic, 3-indolepropionic and benzoic acid); 2,4-dichlorophenoxyacetic acid, and L-(-)-2,4-dichlorophenoxyisopropionic acid were of intermediate activity. Auxin-promoted bending was reversible and presumably caused by turgor increase in the treated cells.Abbreviations IAA
3-indolacetic acid
- NAA
naphthylacetic acid |
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Keywords: | Auxin Leaf movement Phaseolus Pulvinus Turgor movement |
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