title: Trace enrichment of cytokinins from Douglas-fir xylem extrudate.
abstract: Quantitative trace-enrichment of cytokinins from a plant source (xylem sap from the Douglasfir, Pseudotsuga menziesii (Mirb.) Franco) has been achieved by adsorption onto octadecyl-silica columns followed by elution with ethanol. Adsorption is rapid and efficient and allows complete recovery of cytokinins at the nanomolar level. Douglas-fir sap contains at least four compounds having cytokinin activity, one of which co-elutes with zeatin and another with ribosylzeatin.
authors.affiliation: Department of Agricultural Chemistry, Oregon State University, 97331, Corvallis, Oregon, USA.
authors.forename: R O
authors.initials: RO
authors.lastname: Morris
authors.forename: J B
authors.initials: JB
authors.lastname: Zaerr
authors.forename: R W
authors.initials: RW
authors.lastname: Chapman