“…Except for position effects of explants withina plant or a bulb(28,50,57,68,69), position effects may occur within explants, viz., basipetal polarity(4,28, 43,48,69), and lateral polarity(20, 31,69). INDUCTION OF PLANTLETSThe majority of the described propagation methods is based on adventitious formation of plantlets, which originate from one or a few cells within an explant.…”