Effects of elevated [CO2] and nitrogen nutrition on cytokinins in the xylem sap and leaves of cotton
We measured the level of xylem-derived cytokinins (CKs) entering a cotton leaf, and the CK levels in the same leaf, thus enabling xylem sap and foliar CKs to be compared concurrently. Although zeatin was the dominant CK in xylem sap, zeatin, dihydrozeatin, and N6-(2-isopentenyl) adenine were present in approximately equimolar levels in leaves. Elevated [CO2] (EC) has an effect on the levels of cytokinins in sap and leaf tissues. This effect was modulated by the two levels of root nitrogen...[Show more]
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