Auxin transport in Convolvulus roots cultured in vitro.

Abstract

Movement of carboxyl-labeled indoleacetic acid was studied in cultured roots of Convolvulus arvensis. Segments, excised from a region 165-350 mm from the root tip, were used to determine the polarity of auxin movement, the rate of its movement, and the dependence of its movement on concentration. Results of these experiments indicated that polar movement of auxin towards the root tip occurred at a rate of about 10 mm per hour.