title: Growth distribution and surface pH patterns along maize roots.
abstract: The distribution of elongation and surface pH patterns along the primary roots of maize (cv. LG 11), maintained vertically in humid air (darkness, 22°C), have been analysed quantitatively. A new technique employing Sephadex G 25 beads containing a pH indicator dye (bromocresol purple), was used for measuring both the growth gradient of the roots (Sephadex beads as markers) and at the same time, the surface pH changes (referring to a standard scale). The optimal axial growth was located between 2 and 4 mm from the tip. This coincides with the optimal decrease in surface pH.
authors.affiliation: Institute of Plant Biology and Physiology of the University, 6 Place de la Riponne, CH-1005, Lausanne, Switzerland.
authors.forename: P E
authors.initials: PE
authors.lastname: Pilet
authors.forename: J M
authors.initials: JM
authors.lastname: Versel
authors.forename: G
authors.initials: G
authors.lastname: Mayor