Fig. 1From: Cryopreservation of Abies alba × A. numidica and Pinus nigra embryogenic tissues by stepwise dehydration methodViable cells of embryogenic regions of early-stage somatic embryos of P. nigra visible after staining the cryostored tissues based on the fluorescein diacetate (FDA) test (a). Early-stage somatic embryos of P. nigra (b) observed after acetocarmine staining (ERembryogenic region; Ssuspensor). Bars = 200 µmBack to article page