On Relationships between Endosymbiosis and the Origin of Plastids and Mitochondria

Schnepf, E.; BrownJr., R. Malcolm

doi:10.1007/978-3-540-36396-5_10

Cited by 56 publications

(25 citation statements)

References 104 publications

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“…The rhizopod amoeba Paulinella chromatophora contains a cyanelle similar in appearance to the glaucocystophytes but, based on all available evidence, the host cell is derived from a nonphotosynthetic protist line that is unrelated to any other group containing primary plastids (54). An analogous situation appears to be true for species of the dinoflagellate genus Dinophysis (55). † Although molecular analyses have suggested a single, primary origin for plastids (refs.…”

Section: Discussionmentioning

confidence: 99%

The origin of red algae: Implications for plastid evolution

Stiller

Hall

1997

Proc. Natl. Acad. Sci. U.S.A.

333

157

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The origin of the red algae has remained an enigma. Historically the Rhodophyta were classified first as plants and later as the most ancient eukaryotic organisms. Recent molecular studies have indicated similarities between red and green plastids, which suggest that there was a single endosymbiotic origin for these organelles in a common ancestor of the rhodophytes and green plants. Previous efforts to confirm or reject this effort by analyses of nuclear DNA have been inconclusive; thus, additional molecular markers are needed to establish the relationship between the host cell lineages, independent of the evolutionary history of their plastids. To furnish such a data set we have sequenced the largest subunit of RNA polymerase II from two red algae, a green alga and a relatively derived amoeboid protist. Phylogenetic analyses provide strong statistical support for an early evolutionary emergence of the Rhodophyta that preceded the origin of the line that led to plants, animals, and fungi. These data, which are congruent with results from extensive analyses of nuclear rDNA, argue for a reexamination of current models of plastid evolution.

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Section: Discussionmentioning

confidence: 99%

The origin of red algae: Implications for plastid evolution

Stiller

Hall

1997

Proc. Natl. Acad. Sci. U.S.A.

333

157

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“…From an evolutionary point of view, the inner membrane of the chloroplast envelope is homologous to the cytoplasmic membrane of cyanobacteria (Schnepf and Brown 1971). We therefore investigated whether the NDH-H subunit is also present on both membrane systems in plastids.…”

Section: Discussionmentioning

confidence: 99%

Studies on the expression of NDH-H, a subunit of the NAD(P)H-plastoquinone-oxidoreductase of higher-plant chloroplasts

Berger

Ellersiek

Westhoff

et al. 1993

Planta

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Abstract. The plastid genomes of higher plants contain eleven reading frames (ndhA-K) that are homologous to genes encoding subunits of the mitochondrial NADHubiquinone-oxidoreductase (complex I). The carboxyterminal end of the NDH-H subunit from rice (Oryza sativa L.) was expressed as a fusion protein in Escherichia coli and antibodies against the fusion protein were generated in rabbits. The antibody was used to study the expression of NDH-H, and the following results were obtained: (i) NDH-H is expressed in mono-and dicotyledonous plants, (ii) NDH-H is localized on the stroma lamellae of the thylakoid membrane and (iii) NDH-H is expressed in etioplasts. Together with the finding that two other ndh genes (ndhI and ndhK) are expressed in plastids, these results point to the existence of an NAD(P)H-plastoquinone-oxidoreductase on the thylakoid membrane. The possible function of the enzyme in plastids is discussed and it is suggested that it works in balancing the ATP/ADP and the NADPH/NADP ratios during changing external (i.e. light) or internal (i.e. ATP and NADPH demands of biosynthetic pathways of the plastid) conditions.

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“…The single envelope of a symbiotic cyanelle is naturally identical with a cell membrane, since the cell wall of the symbiont presumably would be digested during symbiosis in a host cell (Schnepf and Brown 1971). There are different opinions on the origin of the double envelope of eucaryotic chloroplasts.…”

Section: Discussionmentioning

confidence: 99%

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

1980

CYTOLOGIA

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On Relationships between Endosymbiosis and the Origin of Plastids and Mitochondria

Cited by 56 publications

References 104 publications

The origin of red algae: Implications for plastid evolution

The origin of red algae: Implications for plastid evolution

Studies on the expression of NDH-H, a subunit of the NAD(P)H-plastoquinone-oxidoreductase of higher-plant chloroplasts

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.

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