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.
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Abbreviations
- IAA:
-
3-indolacetic acid
- NAA:
-
naphthylacetic acid
References
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Krieger, K.G. Early time course and specificity of auxin effects on turgor movement of the bean pulvinus. Planta 140, 107–109 (1978). https://doi.org/10.1007/BF00384908
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DOI: https://doi.org/10.1007/BF00384908