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ULTRASTRUCTURE OF A FRESHWATER BROWN ALGA FROM WESTERN CANADA 1
Author(s) -
Pueschel Curt M.,
Stein Janet R.
Publication year - 1983
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.0022-3646.1983.00209.x
Subject(s) - ultrastructure , biology , chloroplast , botany , plasmodesma , thylakoid , brown algae , centriole , algae , biochemistry , gene
Heribaudiella fluviatilis (Aresch.) Sved. is a freshwater brown alga distributed in Europe and Japan, but known only from one questionable record in eastern North America. It is now reported as present in western Canada, approximately 250 km from any marine water. Ultrastructural features prove its phaeophycean character. Each cell contains several discoid chloroplasts with thylakoids in triplets and an encircling triplet adjacent to the chloroplast envelope. Voluminous osmiophilic substances presumed to be physodes (phenolics) are present, as well as a single nucleus associated with dictyosomes and a pair of centrioles. The cell walls are perforated by plasmodesmata, which are considered of importance in cohesion of filaments.