Valladares, F/ Ascaso, C 1992: Three-dimensional quantitative description of symbiont ultrastructure within the algal layer of two members of the lichen family Umbilicariaceae. - Lichenologist24(3): 281-297. [RLL List # 149 / Rec.# 19230] Keywords: CHLOROPLASTS/ LASALLIA/ MYCOBIONT/ PHOTOBIONT/ PYRENOIDS/ STEREOLOGY/ SYMBIONT VOLUME/ ULTRASTRUCTURE/ UMBILICARIA/ UMBILICARIACEAE
Abstract: 5 fig. 3 tab. ["The ultrastructure of the symbionts within the algal layer of Lasallia hispanica and Umbilicaria spodochroa has been investigated by applying stereological techniques to quantify cellular organelles and structures. The stereological parameters calculated were volume density (Vv) and surface density (Sv)....Significant differences between the two lichen species with respect to both symbionts were observed."