Morphological evaluation of olive plants propagated in vitro culture through axillary buds and somatic embryogenesis methods

Abstract

The morphological fidelity of the olive plants propagated through axillary buds, microplants and somatic
embryogenesis, somatic plants was evaluated. Thirty-two morphological traits were used to characterize the
tissue culture propagated olive plants. The microplants showed very high phenotypic similarity compared to
plants produced by conventional cutting propagation method. The somatic plants exhibited variant
morphological stable phenotypes, among somaclonal population two variant phenotypes were studied: BOS
(bush-olive somaclone) and COS (columnar-olive somaclone) . A wide range of plant traits were differently
involved in somaclonal variation as plant height, canopy dimensions, leaf, inflorescence and fruit dimensions in
respect to the putative control plants. The present study has established that the morphological stability of
tissue culture-derived olive plants is strictly related with the in vitro propagation method used.