The influence of growth regulators on proliferation and rooting of in vitro propagated myrtle

The influence of various growth regulators, in different quantities, and th e physiological and biological stage of the plant, on the in vitro propagat ion of myrtle (Myrtus communis L.) were evaluated. It was found that the pr oliferation was dependent on both the medium and the period in which the sa mpling was performed. The highest rate of in vitro shoot proliferation was obtained by using 6-benzyladenine and alpha -naphthyleneacetic acid as grow th regulators, starting from nodes sampled at the beginning of May. Rooting was achieved by either transplanting the shoots directly into soil or by c ulturing on a medium containing 1 mg l(-1) of indole-3-acetic acid.