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ARAGONITE CRYSTALS IN SPIROGYRA SP. (CHLOROPHYTA)
Author(s) -
Mann H.,
Mann S.,
Fyfe W. S.
Publication year - 1987
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.1529-8817.1987.tb02539.x
Subject(s) - spirogyra , aragonite , chlorophyta , biology , selected area diffraction , morphology (biology) , algae , botany , lamella (surface anatomy) , diffraction , paleontology , calcite , optics , physics
Intracellular crystals of aragonite have been identified by selected area electron diffraction (SAED) in a species of the freshwater filamentous alga Spirogyra from the Thames River, Ontario, Canada. The crystals are 2 to 24 μm in diameter, and characterized by a unique cross‐shaped morphology, in which needle‐like, or prismatic outgrowths develop from a common axis. Crystals may be dispersed throughout filaments, but tend to cluster as aggregates towards the centre .