Plant Hormones Laboratory, Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Bangalore, 560080.
Ribosyl zeatin (ZR) and zeatin (Z) were identified as the principal forms of cytokinins in the xylem sap of egg plant at flowering stage. The identification was based on their chromatographic behaviour in sephadex column chromatography and high performance liquid chromatography (HPLC). Two other cytokinins which were present in extremely low concentrations in the xylem sap showed elution patterns similar to those of isopentenyl adenine (iP) and isopentenyl adenosine (iPA) in sephadex column chromatography.
