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Morphology and ultrastructure of multiple life cycle stages of the photosynthetic relative of apicomplexa, Chromera velia.

Morphology and ultrastructure of multiple life cycle stages of the photosynthetic relative of apicomplexa, Chromera velia.
Morphology and ultrastructure of multiple life cycle stages of the photosynthetic relative of apicomplexa, Chromera velia.
Chromera velia is a photosynthetic alga with a secondary plastid that represents the closest known photosynthetic relative of the apicomplexan parasites. The original description of this organism was based on brownish, immotile coccoid cells, which is the predominating stage of C. velia in the culture. Here we provide a detailed light and electron microscopy description of coccoid cells of C. velia and a previously undocumented bi-flagellated stage that is highly motile and moves in a characteristic zig-zag pattern. Transformation from a coccoid into a flagellate stage occurs in exponentially growing cultures, and is accelerated by exposure to light. The C. velia cells contain a pseudoconoid, which is likely homologous to the corresponding structure in the apical complex of Apicomplexa, cortical alveoli subtended by subpellicular microtubules, mitochondrion with tubular cristae, a micropyle, and a distinctive chromerosome, an apparently novel type of extrusion organelle. Ultrastructural analysis of the flagellate supports its close association with colpodellids and apicomplexans and provides important insight into their evolution.

1434-4610
115-130
Oborník, M
2f082ea3-20ab-4cdf-b931-be97d5b3156e
Vancová, M
e8da6667-ca48-40e5-b912-e89f6f173d32
Lai, De-Hua
da8ca99a-82a8-4be1-945f-47142be1af58
Janouškovec, J
fbaa4a5d-872e-465b-b2c3-bb35df455cc6
Keeling, PJ
fd51c2ef-1daa-442d-b186-71001aa7ca7d
Lukeš, J
69d956b0-f0d2-4990-9468-a0793c4a7141
Oborník, M
2f082ea3-20ab-4cdf-b931-be97d5b3156e
Vancová, M
e8da6667-ca48-40e5-b912-e89f6f173d32
Lai, De-Hua
da8ca99a-82a8-4be1-945f-47142be1af58
Janouškovec, J
fbaa4a5d-872e-465b-b2c3-bb35df455cc6
Keeling, PJ
fd51c2ef-1daa-442d-b186-71001aa7ca7d
Lukeš, J
69d956b0-f0d2-4990-9468-a0793c4a7141

Oborník, M, Vancová, M, Lai, De-Hua, Janouškovec, J, Keeling, PJ and Lukeš, J (2011) Morphology and ultrastructure of multiple life cycle stages of the photosynthetic relative of apicomplexa, Chromera velia. Protist, 162 (1), 115-130. (doi:10.1016/j.protis.2010.02.004).

Record type: Article

Abstract

Chromera velia is a photosynthetic alga with a secondary plastid that represents the closest known photosynthetic relative of the apicomplexan parasites. The original description of this organism was based on brownish, immotile coccoid cells, which is the predominating stage of C. velia in the culture. Here we provide a detailed light and electron microscopy description of coccoid cells of C. velia and a previously undocumented bi-flagellated stage that is highly motile and moves in a characteristic zig-zag pattern. Transformation from a coccoid into a flagellate stage occurs in exponentially growing cultures, and is accelerated by exposure to light. The C. velia cells contain a pseudoconoid, which is likely homologous to the corresponding structure in the apical complex of Apicomplexa, cortical alveoli subtended by subpellicular microtubules, mitochondrion with tubular cristae, a micropyle, and a distinctive chromerosome, an apparently novel type of extrusion organelle. Ultrastructural analysis of the flagellate supports its close association with colpodellids and apicomplexans and provides important insight into their evolution.

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More information

Published date: 1 January 2011
Additional Information: Copyright © 2010 Elsevier GmbH. All rights reserved.

Identifiers

Local EPrints ID: 467575
URI: http://eprints.soton.ac.uk/id/eprint/467575
ISSN: 1434-4610
PURE UUID: b7b60ccd-b534-447b-a02f-8dbc92155275
ORCID for J Janouškovec: ORCID iD orcid.org/0000-0001-6547-749X

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Date deposited: 14 Jul 2022 17:03
Last modified: 19 Jul 2022 02:13

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Contributors

Author: M Oborník
Author: M Vancová
Author: De-Hua Lai
Author: J Janouškovec ORCID iD
Author: PJ Keeling
Author: J Lukeš

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