Electron microscope studies on the morphogenesis of plastids. VIII. Further studies on the fine structure of Cyanidium caldarium with special regard to the photosynthetic apparatus.

Toyama, Shigehiro

doi:10.1508/cytologia.45.779

Cited by 17 publications

(4 citation statements)

References 39 publications

(7 reference statements)

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“…Cyanidium shares several properties with the unicellular red algae of the genus Porphyridium (10,23,26). But in contrast to red algae, Cyanidium can exist in a hot and acidic environment and furthermore, it is able to grow heterotrophically in the dark with glucose as carbon source.…”

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confidence: 99%

Photo- and Metabolite Regulation of the Synthesis of Ribulose Bisphosphate Carboxylase/Oxygenase and the Phycobiliproteins in the Alga Cyanidium caldarium

Steinmüller¹,

Zetsche²

1984

Plant Physiol.

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Hitherto, the regulation of the synthesis of plastid proteins has mainly been studied in green algae and higher plants. For these plants it is now well established that the synthesis of plastid proteins is under the control of light and phytohormones and in the case of several algae under the control of a metabolizable carbon source in the culture medium (5,8,20,27). The enzyme RuBPCase3 is one ofthe most thoroughly studied plastid proteins in green algae and higher plants.It is composed of eight large and eight small subunits. In green algae and higher plants the LSU is encoded by plastid DNA and synthesized on 70 S ribosomes, while the SSU is encoded in nuclear genes and is synthesized on the 80 S ribosomes of the cytoplasm as a precursor polypeptide (11,13,17,22).In a previous paper (25) we have demonstrated that in the unicellular eukaryotic alga Cyanidium caldarium, the SSU of RuBPCase is synthesized together with the LSU of the enzyme by poly(A)-RNA. Both subunits are synthesized in the size of the mature subunits. These findings suggest that the gene for the SSU of RuBPCase may be encoded in the plastid DNA of this 1 Supported by the Deutsche Forschungsgemeinschaft, Bad Godesberg.

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confidence: 99%

Photo- and Metabolite Regulation of the Synthesis of Ribulose Bisphosphate Carboxylase/Oxygenase and the Phycobiliproteins in the Alga Cyanidium caldarium

Steinmüller¹,

Zetsche²

1984

Plant Physiol.

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“…This alga was also believed to possess neither Golgi bodies nor microbodies (Toyama, 1980). However, Ueda & Yokochi (1981) showed the presence of a doublemembrane chloroplast envelope, Golgi bodies and microbodies resembling those in red algae.…”

Section: Discussionmentioning

confidence: 99%

“…The chloroplast envelope was reported as the most conspicuous morphological feature of Cyanidium caldarium and assumed to be composed of a single envelope membrane instead of the double membranes in all other plants (Rosen & Siegesmund, 1961;Toyama, 1974Toyama, , 1980De Luca, Raffaele & Merola, 1979). This alga was also believed to possess neither Golgi bodies nor microbodies (Toyama, 1980).…”

Section: Discussionmentioning

confidence: 99%

Chloroplast structure ofCyanidium caldariumshown by freeze-substitution

Ueda

Chida

1987

British Phycological Journal

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“…For example, the inner membrane is resis tant to KMnO4 fixation even when the fixation degrades the structure of outer membrane (Toyama 1980). Besides, the difference between the two membrane is indicated in their permeability, i.e.…”

Section: Discussionmentioning

confidence: 99%