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CRYPTOGLENA PIGRA: A EUGLENOID WITH ONE CHLOROPLAST 1 2
Author(s) -
Rosowski James R.,
Lee Kit W.
Publication year - 1978
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.1529-8817.1978.tb02442.x
Subject(s) - flagellum , chloroplast , biology , cytoplasm , nucleus , thylakoid , microtubule , biophysics , botany , microbiology and biotechnology , biochemistry , bacteria , paleontology , gene
The taxonomic status of Cryptoglena pigra Ehrb., interpreted from observations based on bright‐field microscopy, has been uncertain. Examination with the electron microscope of a clone of C pigra isolated by E. G. Pringsheim reveals certain features which, collectively, are distinctly euglenoid: periplast associated with muciferous bodies and subpellicular microtubules; canal and reservoir with microtubules; one flagellum with a swelling and emergent through a canal, and a second flagellum without a swelling and nonremergent; stigma (eyetpot) closely apprrssed to but not part of the chloroplast; nucleus with permanently condensed chromosomes attached to the inner nuclrar membrane; mitochondria with disc‐shaped cristae constricted at the base; chloroplast with thylakoids often in triplets; and paramylon grains in the cytoplasm. Unlike most euglenoids , C. pigra possesses a single chloroplast that in transverse thin sections is U‐shaped .