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KMID : 0364819660040010001
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Korean Journal of Microbiology
1966 Volume.4 No. 1 p.1 ~ p.13
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Electron microscopic studies on the ultrastrucure of pyrenoid and cell wall in Chlorella cells
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Abstract
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The author examined for observing the structures of pyrenoid and cell wall of three strains of Chlorella ellipsoidea and relation of pyrenoid to starch grain formation at the ultrastructure level. 1. The development of pyrenoid of Chlorella species from the time of its initiation and its subdetail sequent activities are described in some pictures. 2. Close correlation between the findings of light microscopy and electron microscopy is proved. 3. The pyrenoid is a dynamic organellae which continues to change its appearance thoughout the development of the Chlorella cell. 4. The starch grains are continously formed by deposition of carbohydrate within the chloroplast with the aid of pyrenoid factors. 5. Some parental starch grains are passed on the daughter cell during cell division. 6. The Da stage cells contain only chlaroplast without pyrenoid matrix. In Da stage a pyrenoid is surrounded by starch and starch grains appear in chloroplast lamellae. In L₁L₂stages, large starch grains of lens form accumulate in cell. In L₃stage pyrenoid disappears for a time and starch grains are scattered. In cell division stage starch grains are divided into four groups. In L₄stage, pyrenoid substance appears temporarily and disappears soon. At this stage the cell is constituted of Dn cell containing chloroplast only. 7. The cellular boundary of JE strain except Y 815 and Y 511 strain contains 250Å intermediate layer of unknown chemical composition between the fibrillar cellulose wall and the out capsule layer.
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