title: Early time course and specificity of auxin effects on turgor movement of the bean pulvinus.
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.
authors.affiliation: Institut für Biologie III der Universität, Schänzlestraße 1, D-7800, Freiburg i.Br., Federal Republic of Germany.
authors.forename: K G
authors.initials: KG
authors.lastname: Krieger