Propagazione in vitro di alcuni cloni di mirto della Sardegna meridionale

Myrtle (Myrtus communisL.) is a typical Mediterranean bush species, very spread in Sardinia.Present interest in cultivating that species is caused by the increasing demand for berries and leaves to produce the typical liqueur. Due to the high variability of biotypes in response to cutting multiplication, the objective of that paper was to evaluate five south-Sardinian myrtle clones for their micropropagation aptitude. For each clone, three multiplication media and four rooting media were tested; during multiplication, proliferation rate of each clone on each medium was also calculated. Moreover, acclimatization tests were carried out, either in growth chamber (with different types of light radiation), or in green-house (in different periods of the year).Based on proliferation rates, the most suitable multiplication medium was selected for each clone. As to rooting, data were analysed with SAS software, providing the most suitable rooting medium for each clone. Observations during acclimatization trials pointed out the requirement of a conditioned environment (either growth chamber or green-house) in allowing an effective survival of plantlets fromin vitrotoin vivoconditions.