Abstract
SummaryJuvenility effects and genetic differences in relation to rooting have been investigated by testing extractable substances obtained from Pistacia vera (in which the rooting ability is highly age-dependent) and Prunus avium (cvs Colt and F12/1, easy and difficult-to-root, respectively, which are genetic effects). Mungbean cuttings, as well as pistachio and cherry themselves, were used in the rooting bioassays. No inhibitory effect could be detected in extracts of difficult-to-root mature pistachio, extracts of both juvenile and mature pistachio having a promoting effect on rooting of mungbean, which was enhanced by oxidation (addition of H2O2) especially in the presence of IBA. However, in the cherry cvs transferrable, promoting and inhibiting effects on rooting could be demonstrated. In this study the mungbean rooting bioassay showed marked inconsistency which somewhat undermines the validity of this test. A technique of shoot/root grafting resulted in root formation on cuttings of pistachio.
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