Validation of micrografting to analyze compatibility, shoot growth, and root formation in micrografts of kiwifruit (Actinidia spp.)

The present study described a micrografting method for kiwifruits and evaluated graft-compatibility, shoot growth, and root formation and growth of the micrografts. Although time durations of callus formation and initiation of new cambial cells varied with the scion cultivars, vascular bundles were established at about day 21 of micrografting in the four kiwifruit scion cultivars tested. Early callus formation and initiation of new cambial cells promoted bud break in the scions and root formation in rootstocks. These promotive effects enhanced shoot growth, and root formation and growth of the micrografts. This micrografting method has potential for micropropagation of kiwifruit.