title: Auxin in Coleus Stems: Limitation of Transport at Higher Concentrations.
abstract: Previous indirect evidence that the endogenous concentration of plant hormones of the auxin type is controlled by a limitation of transport over the physiological range of concentration was confirmed by measuring directly the transport of the native auxin, indoleacetic acid, through segments of Coleus stems.
authors.forename: T K
authors.initials: TK
authors.lastname: Scott
authors.forename: W P
authors.initials: WP
authors.lastname: Jacobs