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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1111/j.1469-8137.2010.03357.x
|2 doi
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|a eng
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|a Bothwell, John H
|e verfasserin
|4 aut
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|a Role of endoreduplication and apomeiosis during parthenogenetic reproduction in the model brown alga Ectocarpus
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|c 2010
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 05.01.2011
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|a Date Revised 09.01.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a • The filamentous brown alga Ectocarpus has a complex life cycle, involving alternation between independent and morphologically distinct sporophyte and gametophyte generations. In addition to this basic haploid-diploid life cycle, gametes can germinate parthenogenetically to produce parthenosporophytes. This article addresses the question of how parthenosporophytes, which are derived from a haploid progenitor cell, are able to produce meiospores in unilocular sporangia, a process that normally involves a reductive meiotic division. • We used flow cytometry, multiphoton imaging, culture studies and a bioinformatics survey of the recently sequenced Ectocarpus genome to describe its life cycle under laboratory conditions and the nuclear DNA changes which accompany key developmental transitions. • Endoreduplication occurs during the first cell cycle in about one-third of parthenosporophytes. The production of meiospores by these diploid parthenosporophytes involves a meiotic division similar to that observed in zygote-derived sporophytes. By contrast, meiospore production in parthenosporophytes that fail to endoreduplicate occurs via a nonreductive apomeiotic event. • Our results highlight Ectocarpus's reproductive and developmental plasticity and are consistent with previous work showing that its life cycle transitions are controlled by genetic mechanisms and are independent of ploidy
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a DNA
|2 NLM
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|a 9007-49-2
|2 NLM
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|a Marie, Dominique
|e verfasserin
|4 aut
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|a Peters, Akira F
|e verfasserin
|4 aut
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|a Cock, J Mark
|e verfasserin
|4 aut
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|a Coelho, Susana M
|e verfasserin
|4 aut
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|i Enthalten in
|t The New phytologist
|d 1979
|g 188(2010), 1 vom: 27. Okt., Seite 111-21
|w (DE-627)NLM09818248X
|x 1469-8137
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|g volume:188
|g year:2010
|g number:1
|g day:27
|g month:10
|g pages:111-21
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|u http://dx.doi.org/10.1111/j.1469-8137.2010.03357.x
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