THE EFFECT OF PLANT GROWTH REGULATORS ON CENTAURY

(CENTAURIUM ERYTHRAEA RAFN.) SEED GERMINATION

NADA MIJAJLOVIĆ¹, D. GRUBIŠIĆ^2,3, Z. GIBA3 AND R. KONJEVIĆ³

¹"Eko-lab" Quality Management Section Ltd.; ²Siniša Stankoviæ Institute for Biological Research, University of Belgrade, Bulevar Despota Stevana 142, 11060 Belgrade; ³Institute of Botany, Faculty of Science, University of Belgrade, Takovska 43, 11000 Belgrade, Serbia and Montenegro

Abstract - Centaury seeds are light-requiring. Long-term red light irradiation caused more than 80% of seeds to germinate. Seeds did not germinate in darkness. Gibberellic acid and GA7 can replace light, but N-substituted phtalimide AC 94,377 was ineffective. Light-induced germination was inhibited by abscisic acid and growth retardants such as ancymidol, tetcyclacis, and paclobutrazole. Growth retardant-caused inhibition can be overcome by the addition of gibberellic acid.