ELECTRON MICROSCOPY OF THE LICHEN PHYSCZA AZPOLIA (EHRH.) NYL.1,2
- 1 September 1968
- journal article
- Published by Wiley in Journal of Phycology
- Vol. 4 (3), 230-240
- https://doi.org/10.1111/j.1529-8817.1968.tb04720.x
Abstract
The ultrastructure of the lichen Physcia aipolia was studied in the desiccated and hydrated states. No significant structural variation between these 2 states was noted for the fungus. The fungus contains unusual ellipsoidal structures heretofore unobserved. Their possible role in the formation of membrane is discussed. The plasmalemma of the fungus is convoluted while that of the alga is smooth. The convoluted projections have a "double-unit membrane" structure similar to fingerlike projections of the ellipsoidal bodies. With Os O4 fixation crystals are pre-served, enclosed in unit membrane sacs which extend to the convoluted surface. The pyrenoid of the associated alga does not produce starch in the desiccated condition, and electron-dense granules are present in the matrix associated with chloroplast lamellae which enter this area. In the hydrated condition, the alga contains abundant starch in the pyrenoid region, and the electron-dense granules are displaced to the preriphery of the pyrenoid starch. Mitochondria, endo-plasmic reticulum, and ribosomes are not clearly defined in the desiccated state while they are more so in the hydrated condition. Golgi bodies were not observed in the either lichen component. Finally, no fine structural basis for indicating an exchanged of materials between the alga and fungus was observed except, possibly, the convoluted plasmalemma of the fungus and the smooth plasmalemma of the alga.Keywords
This publication has 11 references indexed in Scilit:
- Sporobolomyces Roseus. I. UltrastructureMycologia, 1967
- Electron Microscope Studies of Lichen Reproductive Structures in Physcia aipoliaMycologia, 1966
- Artificial Reestablishment of the Lichen Cladonia cristatellaScience, 1966
- LichensAnnual Review of Microbiology, 1965
- FINE STRUCTURE OF FUNGI AS REVEALED BY ELECTRON MICROSCOPYBiological Reviews, 1965
- Microfibrillar structure in the fungal portions of the lichen Xanthoria parietina (L.) th. frExperimental Cell Research, 1964
- THE CYTOPLASMIC FINE STRUCTURE OF THE DIATOM, NITZSCHIA PALEA The Journal of cell biology, 1963
- Über die Beziehungen von Haustorientypus und Organisationshöhe bei FlechtenÖsterreichische botanische Zeitschrift, 1963
- Licht- und elektronenmikroskopische Untersuchungen an Polystictus versicolorArchiv für Mikrobiologie, 1961
- Fine Structure of mycota: 2. Demonstration of the Haustoria of LichensMycologia, 1960