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R. Soc. B."],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:p>\n                    In various animal species with distinct sexes, sequential hermaphroditism occurs whereby adults change their sex. The role of environmental factors in triggering sex change events is still relatively poorly understood, despite that climate-driven sex-ratio distortion may increase extinction risk. Here, we investigated the effect of seasonal temperature fluctuations on the expression of sex-related genes and sex change in the gonochoristic freshwater cnidarian, brown hydra (\n                    <jats:italic toggle=\"yes\">Hydra oligactis<\/jats:italic>\n                    ). Individuals of this species reproduce clonally throughout much of the year but switch to sexual reproduction when temperature decreases in autumn. After sexual reproduction, some individuals can revert back to clonality again. We found that clonal offspring derived from these individuals had a relatively high rate of female-to-male transition. The sexual stage was most differentiated in terms of gene expression, with a large number of genes involved in cellular differentiation and gametogenesis differentially expressed between males and females undergoing gamete production, while asexual individuals belonging to the male and female strain were transcriptomically nearly identical following sexual reproduction. These results show that seasonal environmental changes and associated life stage transitions \u2018homogenize\u2019 the gene expression profiles of males and females, ultimately enabling the emergence of alternative sexual phenotypes within strains with an otherwise stable sex.\n                  <\/jats:p>","DOI":"10.1098\/rspb.2024.2777","type":"journal-article","created":{"date-parts":[[2025,7,15]],"date-time":"2025-07-15T23:06:26Z","timestamp":1752620786000},"update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["Seasonal environmental change and sex change in a cnidarian"],"prefix":"10.1098","volume":"292","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3932-0776","authenticated-orcid":true,"given":"R\u00e9ka","family":"Gergely","sequence":"first","affiliation":[{"name":"MTA-DE \u2018Momentum\u2019 Ecology, Evolution and Developmental Biology Research Group, Department of Evolutionary Zoology, University of Debrecen","place":["Debrecen, Hungary"]},{"name":"P\u00e1l Juh\u00e1sz-Nagy Doctoral School, Faculty of Science and Technology, University of Debrecen","place":["Debrecen, Hungary"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2136-5346","authenticated-orcid":true,"given":"Veronika","family":"B\u00f3kony","sequence":"additional","affiliation":[{"name":"Department of Evolutionary Ecology, Plant Protection Institute, HUN-REN Centre for Agricultural Research","place":["Budapest, Hungary"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7121-9865","authenticated-orcid":true,"given":"Zoltan","family":"Barta","sequence":"additional","affiliation":[{"name":"HUN-REN-DE Behavioural Ecology Research Group, Department of Evolutionary Zoology and Human Biology, University of Debrecen","place":["Debrecen, Hungary"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6908-6493","authenticated-orcid":true,"given":"J\u00e1cint","family":"T\u00f6k\u00f6lyi","sequence":"additional","affiliation":[{"name":"MTA-DE \u2018Momentum\u2019 Ecology, Evolution and Developmental Biology Research Group, Department of Evolutionary Zoology, University of Debrecen","place":["Debrecen, Hungary"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"175","published-online":{"date-parts":[[2025,7,16]]},"reference":[{"key":"e_1_3_7_2_2","doi-asserted-by":"publisher","DOI":"10.1186\/s12862-017-1071-3"},{"key":"e_1_3_7_3_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.0014-3820.2006.tb00525.x"},{"key":"e_1_3_7_4_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-022-30419-z"},{"key":"e_1_3_7_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tree.2005.10.020"},{"key":"e_1_3_7_6_2","doi-asserted-by":"publisher","DOI":"10.1159\/000452362"},{"key":"e_1_3_7_7_2","doi-asserted-by":"publisher","DOI":"10.1159\/000450972"},{"key":"e_1_3_7_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/bies.202200039"},{"key":"e_1_3_7_9_2","doi-asserted-by":"publisher","DOI":"10.1111\/jeb.12333"},{"key":"e_1_3_7_10_2","doi-asserted-by":"publisher","DOI":"10.1111\/1365-2435.14420"},{"key":"e_1_3_7_11_2","doi-asserted-by":"publisher","DOI":"10.1159\/000515221"},{"key":"e_1_3_7_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tree.2019.02.012"},{"key":"e_1_3_7_13_2","doi-asserted-by":"publisher","DOI":"10.1071\/MF10269"},{"key":"e_1_3_7_14_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11160-021-09681-9"},{"key":"e_1_3_7_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/bies.202000050"},{"key":"e_1_3_7_16_2","doi-asserted-by":"publisher","DOI":"10.1002\/1097-010X(20000801)287:3<233::AID-JEZ5>3.0.CO;2-F"},{"key":"e_1_3_7_17_2","doi-asserted-by":"publisher","DOI":"10.1098\/rspb.2017.2869"},{"key":"e_1_3_7_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cbpa.2013.02.007"},{"key":"e_1_3_7_19_2","doi-asserted-by":"publisher","DOI":"10.1159\/000282494"},{"key":"e_1_3_7_20_2","doi-asserted-by":"publisher","DOI":"10.1186\/s12862-021-01747-3"},{"key":"e_1_3_7_21_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrd.22690"},{"key":"e_1_3_7_22_2","doi-asserted-by":"publisher","DOI":"10.1387\/ijdb.123509cf"},{"key":"e_1_3_7_23_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.83.24.9478"},{"key":"e_1_3_7_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/0012-1606(85)90100-9"},{"key":"e_1_3_7_25_2","doi-asserted-by":"publisher","DOI":"10.1016\/0012-1606(86)90311-8"},{"key":"e_1_3_7_26_2","doi-asserted-by":"publisher","DOI":"10.1111\/mec.15810"},{"key":"e_1_3_7_27_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ydbio.2013.01.016"},{"key":"e_1_3_7_28_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-4-431-56609-0_7"},{"key":"e_1_3_7_29_2","volume-title":"Ecology, biology of ydra","author":"Burnett A","year":"1973","unstructured":"Burnett A, Reisa JJ. 1973 Ecology, biology of ydra. 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