CYTOLOGIA
Online ISSN : 1348-7019
Print ISSN : 0011-4545
Structure of Plant Cells with Special Reference to Lower Plants
III. A cytological study of Euglena gracilis
Katsumi Ueda
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JOURNAL FREE ACCESS

1958 Volume 23 Issue 1 Pages 56-67

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Abstract

1. Structures of pure cultured Euglena were studied with an optical and an electron microscope. A cytochemical test was carried out with the Feulgen and the pyronin-methyl green staining.
2. a. A chromonema in resting stage is composed of several thin threads, 10mμ in thickness.
b. A chloroplast has many lamellae and usually one pyrenoid in which several lamellae are observed.
c. In the mitochondria which reduce Janus green B, cristae mitochondriales are observed.
d. A flagellum is composed of several threads running lengthwise.
e. An eye spot is constructed with many spherical bodies.
f. An endoplasmic reticulum seems to be constructed with complicated membranes or tubes
g. On the cell surface there are many grooves surrounding the cell surface.
3. Chromosomal behaviors in mitotic cycle are similar to those in mitosis observed in higher plants.
4. Polynucleate cells, which seem to be somewhat abnormal, are observed sometimes.
5. The results of the cytochemical tests showed that the chromonemata contained DNA and the nucleoli contained RNA.

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© The Japan Mendel Society
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