Polevova,
S.V. Sporoderm
ultrastructure in Anthoceros agrestis Paton
Arctoa (2012) 21: 63-69
The sporoderm ultrastructure in Anthoceros agrestis
Paton is unique. The wall of mature spores consists of granules varying in size
and shape, and does not have any homogenеous or lamellar layers. The electron-lucent
sporopollenin, which forms granules of the exosporium, is comparable to that in
other spore-bearing plants (mosses, liverworts and Pteridophyta) in its
electron density, while it is different in structure. Electron-dense substances
in the gaps between the exosporium granules are resistant to acetolysis and are
probably sporopolleninous.