THE ROLE OF PLANT GROWTH REGULATORS IN THE INDUCTION OF CALLUS TREATED WITH HARMEL SEEDS EXTRACT AND THE REGENERATION AND ROOTING OF VEGETATIVE GROWTHS OF BARLEY VARIETIES IN VITRO: THE ROLE OF PLANT GROWTH REGULATORS IN THE INDUCTION OF CALLUS TREATED WITH HARMEL SEEDS EXTRACT AND THE REGENERATION AND ROOTING OF VEGETATIVE GROWTHS OF BARLEY VARIETIES IN VITRO. IJMRCP [Internet]. 2026 Mar. 31 [cited 2026 Jun. 2];18(1):275-90. Available from: https://jmracpc.uobaghdad.edu.iq/index.php/IJMRCP/article/view/586