The Ability of Olive Rhizogenesis in Correlation with Vegetative Growth

The present study was carried out in a three–year period, to investigate olive varieties propagation (Kaninjot, Mixan, Bardhi Tiranes, Kryps Berati, Himara, and Frantoio), by treatment with indol-3 butyric acid (IBA), (IBA2gl¯¹, IBA5gl¯¹ and Control), in the typical vegetation phases: February, May, September and December, with mist-propagation method. After 70 days, the percentage of rooting of studied cultivars varies from 2 to 95%. The two IBA dosages have not affected rooting in the same way within each period. IBA at IBA2gl¯¹ and IBA5gl¯¹, gave high rooting percentages for Kaninjot, UBT and Mixan cultivars, respectively from 67 to 78%; 63 to 70%; and 56 to 77%. Leafage presence has been an important factor. Defoliation has varied between 8.3 and 44.1%. At high cambial activity, the IBA concentration of IBA2gl¯¹, resulted more effective; whereas under conditions of low cambial activity, high IBA concentrations yielded better results. At active vegetation stage the IBA in high concentrations shows inhibitory and toxic effect. The control gave low rooting percentage and with significantly highlighted changes compared to IBA treatments. Cultivars have their highest endogenous rhizogenic capacity in May and September, period which corresponds to the active cambium activity.Keywords: Olive, propagation, nebulization, IBA, culture, mist-propagation