Leaf anatomy plasticity of Acca sellowiana (O. Berg) Burret in vitro cultured in natural ventilation system and ex vitro acclimatized

Acca sellowiana (Berg) Burret is a fruit species native to southern Brazil and Uruguay. Micropropagation techniques have been developed in order scale-up the mass propagation of new varieties. Micropropagated plants display anatomical, morphological physiological changes, which may negativelly affect their initial development acclimatization phase. The objective this work was compare morphometric characteristics leaf tissues vitro culture system with natural conventional ventilation, as well during Stomatal density, stomatal length, pore length chlorophyll contente were enhanced ventilation system. xylem area perimeter, mesophyll, palisade spongy parenchyma showed plasticity indicating greater adaptability water light relationships transition from ex culture. Index terms: Feijoa; gas exchange; micropropagation; histology; stomata.