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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Identification of the meiotic toolkit in diatoms and exploration of meiosis-specific SPO11 and RAD51 homologs in the sexual species Pseudo-nitzschia multistriata and Seminavis robusta Patil, S.; Moeys, S.; von Dassow, P.; Huysman, M.J.J.; Mapleson, D.; De Veylder, L.; Sanges, R.; Vyverman, W.; Montresor, M.; Ferrante, M.I. (2015). Identification of the meiotic toolkit in diatoms and exploration of meiosis-specific SPO11 and RAD51 homologs in the sexual species Pseudo-nitzschia multistriata and Seminavis robusta. BMC Genom. 16: 21 pp. https://dx.doi.org/10.1186/s12864-015-1983-5 In: BMC Genomics. BioMed Central: London. e-ISSN 1471-2164, meer Is gerelateerd aan: Patil, S.; Moeys, S.; von Dassow, P.; Huysman, M.J.J.; Mapleson, D.; De Veylder, L.; Sanges, R.; Vyverman, W.; Montresor, M.; Ferrante, M.I. (2019). Correction to: identification of the meiotic toolkit in diatoms and exploration of meiosis-specific SPO11 and RAD51 homologs in the sexual species Pseudonitzschia multistriata and Seminavis robusta. BMC Genom. 20: 544. https://dx.doi.org/10.1186/s12864-019-5942-4, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 303294 [ download pdf ]

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Trefwoorden

Bacillariophyceae [WoRMS] Marien/Kust

Author keywords

Meiosis; Diatoms; Sexual reproduction; SPO11; RAD51

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Auteurs		Top
Patil, S. Moeys, S. von Dassow, P. Huysman, M.J.J., meer	Mapleson, D. De Veylder, L., meer Sanges, R.	Vyverman, W., meer Montresor, M. Ferrante, M.I.

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Abstract

BackgroundSexual reproduction is an obligate phase in the life cycle of most eukaryotes. Meiosis varies among organisms, which is reflected by the variability of the gene set associated to the process. Diatoms are unicellular organisms that belong to the stramenopile clade and have unique life cycles that can include a sexual phase.ResultsThe exploration of five diatom genomes and one diatom transcriptome led to the identification of 42 genes potentially involved in meiosis. While these include the majority of known meiosis-related genes, several meiosis-specific genes, including DMC1, could not be identified. Furthermore, phylogenetic analyses supported gene identification and revealed ancestral loss and recent expansion in the RAD51 family in diatoms. The two sexual species Pseudo-nitzschia multistriata and Seminavis robusta were used to explore the expression of meiosis-related genes: RAD21, SPO11-2, RAD51-A, RAD51-B and RAD51-C were upregulated during meiosis, whereas other paralogs in these families showed no differential expression patterns, suggesting that they may play a role during vegetative divisions. An almost identical toolkit is shared among Pseudo-nitzschia multiseries and Fragilariopsis cylindrus, as well as two species for which sex has not been observed, Phaeodactylum tricornutum and Thalassiosira pseudonana, suggesting that these two may retain a facultative sexual phase.ConclusionsOur results reveal the conserved meiotic toolkit in six diatom species and indicate that Stramenopiles share major modifications of canonical meiosis processes ancestral to eukaryotes, with important divergences in each Kingdom.

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