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Preliminaries histological studies from the micrografting of tissue cultured apple

The modern fruitculture needs to introduce techniques that allow a less expensive production of high quality fruits. The micropropagation associate to micrografting provides high average of plant multiplication and disease free material. In addition it provides studies of grafting compatibilities. The present work aim to study the process of the micrografting union of tissue cultured apple (Malus domestica. Borkh). The scions were cleft-grafted on the rootstocks, under aseptic conditions. For histological studies specimens were trimmed down to 4mm above and below the graft union (longitudinal cuts). The graft union development resulted in the generation of meristem tissue, originating parenchymatous cells at the graft interface, and a cambial tissue proliferation from the scion. This procedure allows the vascular system connection between the scion and the rootstock, resulting on micrograft viability.

Malus sp.; micropropagation; micrografting; histology


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