Observações anatômicas em plantas de Coffea arabica L. obtidas por enraizamento de estacas

Abstract

F1 hybrid cloning using rooting of cuttings is a way to achieve less expensive and quicker Coffea arabica improvement. Cloning is still a problem in Coffea arabica improvement and has been studied by different institutions to develop an efficient methodology. This work aimed to search for the presence of anatomical barriers to rooting of coffee stem cuttings and the origin of adventitious roots, comparing them with the structure of seedling tap roots. Anatomical analyses of young coffee plants were carried out at the Biology Department of the Universidade Federal de Lavras (UFLA), Lavras, MG. Plants of the cultivars Acaiá and Ruby obtained by rooting of cuttings and seedlings were analyzed. No anatomical barriers to adventitious rooting were found in the rooted cuttings. In the cloning plants the rooting arose in close to the vascular tissues. The anatomical study of adventitious roots in the rooted cuttings and seedlings showed the same primary structures.