Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
The organelle genomes in the photosynthetic red algal parasite Pterocladiophila hemisphaerica (Florideophyceae, Rhodophyta) have elevated substitution rates and extreme gene loss in the plastid genome
Preuss, M.; Verbruggen, H.; Zuccarello, G.C. (2020). The organelle genomes in the photosynthetic red algal parasite Pterocladiophila hemisphaerica (Florideophyceae, Rhodophyta) have elevated substitution rates and extreme gene loss in the plastid genome. J. Phycol. 56(4): 1006-1018. https://dx.doi.org/10.1111/jpy.12996
In: Journal of Phycology. Blackwell Science: New York. ISSN 0022-3646; e-ISSN 1529-8817
|  |
| Trefwoorden |
Pterocladiophila hemisphaerica K.C.Fan & Papenfuss, 1959 [WoRMS]
Marien/Kust |
| Author keywords |
dN; dS; General Heterogenous Evolution On a Single Topology (GHOST)model; heterotachy; mitochondrial genome; parasitism; positive selection; reduced plastid genome; relaxed selection |
| Auteurs | | Top |
- Preuss, M.
- Verbruggen, H.
- Zuccarello, G.C.
|
|
|
| Abstract |
Comparative organelle genome studies of parasites can highlight genetic changes that occur during the transition from a free-living to a parasitic state. Our study focuses on a poorly studied group of red algal parasites, which are often closely related to their red algal hosts and from which they presumably evolved. Most of these parasites are pigmented and some show photosynthetic capacity. Here, we assembled and annotated the complete organelle genomes of the photosynthetic red algal parasite, Pterocladiophila hemisphaerica. The plastid genome is the smallest known red algal plastid genome at 68,701 bp. The plastid genome has many genes missing, including all photosynthesis-related genes. In contrast, the mitochondrial genome is similar in architecture to that of other free-living red algae. Both organelle genomes show elevated mutation rates and significant changes in patterns of selection, measured as dN/dS ratios. This caused phylogenetic analyses, even of multiple aligned proteins, to be unresolved or give contradictory relationships. Full plastid datasets interfered by selected best gene evolution models showed the supported relationship of P. hemisphaerica within the Ceramiales, but the parasite was grouped with support as sister to the Gracilariales when interfered under the GHOST model. Nuclear rDNA showed a supported grouping of the parasite within a clade containing several red algal orders including the Gelidiales. This photosynthetic parasite, which is unable to photosynthesize with its own plastid due to the total loss of all photosynthesis genes, raises intriguing questions on parasite–host organelle genome capabilities and interactions. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
