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ULTRASTRUCTURE OF THE LICHEN COENOGONIUM INTERPLEXUM NYL.
Author(s) -
Meier Judy L.,
Chapman Russell L.
Publication year - 1983
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1983.tb06407.x
Subject(s) - lichen , biology , ultrastructure , haustorium , hypha , botany , fungus , thallus , ecology , host (biology)
Coenogonium interplexum Nyl. is a green to yellow‐orange filamentous lichen commonly found on tree bark, rocks, and soil. The mycobiont is the ascomycetous fungus Coenogonium . The ultrastructure of the lichenized phycobiont, Trentepohlia , closely resembles that of the non‐lichenized form, a filamentous subaerial green alga. The mycobiont has a typical fungal ultrastructure, and the cell wall sometimes appears thinner at points of contact with the phycobiont wall. Several branched fungal hyphae are usually randomly arranged around a Trentepohlia filament, and may in some cases completely ensheath the alga. Although no haustoria were observed, this relationship may still be termed a lichen since there is some modification of the alga and the lichen is structurally distinct from the two symbionts.