{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T07:03:08Z","timestamp":1791270188535,"version":"4.1.0"},"reference-count":199,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2024,3,18]],"date-time":"2024-03-18T00:00:00Z","timestamp":1710720000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["HO 4395\/10-2"],"award-info":[{"award-number":["HO 4395\/10-2"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,6,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>The predominance of sex in eukaryotes, despite the high costs of meiosis and mating, remains an evolutionary enigma. Many theories have been proposed, none of them being conclusive on its own, and they are, in part, not well applicable to land plants. Sexual reproduction is obligate in embryophytes for the great majority of species.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Scope<\/jats:title>\n                  <jats:p>This review compares the main forms of sexual and asexual reproduction in ferns and angiosperms, based on the generation cycling of sporophyte and gametophyte (leaving vegetative propagation aside). The benefits of sexual reproduction for maintenance of genomic integrity in comparison to asexuality are discussed in the light of developmental, evolutionary, genetic and phylogenetic studies.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>Asexual reproduction represents modifications of the sexual pathway, with various forms of facultative sexuality. For sexual land plants, meiosis provides direct DNA repair mechanisms for oxidative damage in reproductive tissues. The ploidy alternations of meiosis\u2013syngamy cycles and prolonged multicellular stages in the haploid phase in the gametophytes provide a high efficiency of purifying selection against recessive deleterious mutations. Asexual lineages might buffer effects of such mutations via polyploidy and can purge the mutational load via facultative sexuality. The role of organelle\u2013nuclear genome compatibility for maintenance of genome integrity is not well understood. In plants in general, the costs of mating are low because of predominant hermaphroditism. Phylogenetic patterns in the archaeplastid clade suggest that high frequencies of sexuality in land plants are concomitant with a stepwise increase of intrinsic and extrinsic stress factors. Furthermore, expansion of genome size in land plants would increase the potential mutational load. Sexual reproduction appears to be essential for keeping long-term genomic integrity, and only rare combinations of extrinsic and intrinsic factors allow for shifts to asexuality.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/aob\/mcae044","type":"journal-article","created":{"date-parts":[[2024,3,18]],"date-time":"2024-03-18T14:29:23Z","timestamp":1710772163000},"page":"1-18","source":"Crossref","is-referenced-by-count":32,"title":["Apomixis and the paradox of sex in plants"],"prefix":"10.1093","volume":"134","author":[{"given":"Elvira","family":"H\u00f6randl","sequence":"first","affiliation":[{"name":"Department of Systematics, Biodiversity and Evolution of Plants (with herbarium), University of G\u00f6ttingen , G\u00f6ttingen , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2024,3,18]]},"reference":[{"key":"2024060805053629700_CIT0001","doi-asserted-by":"crossref","first-page":"4","DOI":"10.1111\/jeu.12691","article-title":"Revisions to the classification, nomenclature, and diversity of eukaryotes","volume":"66","author":"Adl","year":"2019","journal-title":"The Journal of Eukaryotic Microbiology"},{"key":"2024060805053629700_CIT0002","doi-asserted-by":"crossref","first-page":"1719","DOI":"10.3732\/ajb.1000188","article-title":"Quantitative variation for apomictic reproduction in the genus Boechera (Brassicaceae)","volume":"97","author":"Aliyu","year":"2010","journal-title":"American Journal of Botany"},{"key":"2024060805053629700_CIT0003","doi-asserted-by":"crossref","first-page":"423","DOI":"10.1038\/nature15205","article-title":"Gene transfer in complex 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