Results indicated that the concentration of zeatin and zeatin riboside(Z+ZR)both in roots and in leaves increased quickly in 0.

Dynamics of zeatin riboside content in leaves and roots of two rice varieties at two developmental stages under the infestation stress by the brown planthopper, Nilaparvata lugens (Stl) (Homoptera: Delphacidae);

Radioimmunoassay for Dihydrozeatinriboside-group Cytokinins;