Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex

Turnera sidoides is a complex of distylous perennial rhizomatous herbs that includes five subspecies. Since polyploidy has played a prominent role within this species (x = 7), ongoing studies in T. sidoides are focused on the understanding of the mechanisms involved in the origin and the establishm...

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Autores principales: Kovalsky, Evelin Ivana, Solís Neffa, Viviana Griselda
Formato: Artículo
Lenguaje:Inglés
Publicado: Sociedad Botánica de Japón 2025
Materias:
Autopolyploidy
Turnera sidoides
Unreduced microspores
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/59374
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-59374
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spelling I48-R184-123456789-593742025-12-15T12:04:04Z Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex Kovalsky, Evelin Ivana Solís Neffa, Viviana Griselda Autopolyploidy Turnera sidoides Unreduced microspores Turnera sidoides is a complex of distylous perennial rhizomatous herbs that includes five subspecies. Since polyploidy has played a prominent role within this species (x = 7), ongoing studies in T. sidoides are focused on the understanding of the mechanisms involved in the origin and the establishment of polyploids. Therefore, aiming to contribute to the understanding of the mode of polyploid formation, in this study we investigated the fre- quency of unreduced microspores in a natural diploid population of T. sidoides subsp. carnea by analyzing the size range of pollen and the constitution of the sporads. The results showed that some of the individuals studied produced 2n and 4n microspores, both in short- and long-styled floral morphs. The analysis performed documents the production of unreduced microspores in T. sidoides subsp. carnea and provides evidence that support the hypothesis of sexual polyploidization as one of the most probable mechanisms involved in the origin of polyploids within this species complex. The role of unreduced pollen in the establishment and persistence of newly formed polyploids in diploid populations of T. sidoides is also discussed. 2025-12-15T11:33:05Z 2025-12-15T11:33:05Z 2012-05-31 Artículo Kovalsky, Evelin Ivana y Solís Neffa, Viviana Griselda, 2012. Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex. Journal of Plant Research. Sakai: Sociedad Botánica de Japón, vol. 125, p. 725-734. E-ISSN 1618-0860. DOI https://doi.org/10.1007/s10265-012-0493-7 0918-9440 http://repositorio.unne.edu.ar/handle/123456789/59374 en https://doi.org/10.1007/s10265-012-0493-7 restrictedAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 725-734 application/pdf Sociedad Botánica de Japón Journal of Plant Research, 2012, vol. 125, p. 725-734.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Autopolyploidy
Turnera sidoides
Unreduced microspores
spellingShingle Autopolyploidy
Turnera sidoides
Unreduced microspores
Kovalsky, Evelin Ivana
Solís Neffa, Viviana Griselda
Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex
topic_facet Autopolyploidy
Turnera sidoides
Unreduced microspores
description Turnera sidoides is a complex of distylous perennial rhizomatous herbs that includes five subspecies. Since polyploidy has played a prominent role within this species (x = 7), ongoing studies in T. sidoides are focused on the understanding of the mechanisms involved in the origin and the establishment of polyploids. Therefore, aiming to contribute to the understanding of the mode of polyploid formation, in this study we investigated the fre- quency of unreduced microspores in a natural diploid population of T. sidoides subsp. carnea by analyzing the size range of pollen and the constitution of the sporads. The results showed that some of the individuals studied produced 2n and 4n microspores, both in short- and long-styled floral morphs. The analysis performed documents the production of unreduced microspores in T. sidoides subsp. carnea and provides evidence that support the hypothesis of sexual polyploidization as one of the most probable mechanisms involved in the origin of polyploids within this species complex. The role of unreduced pollen in the establishment and persistence of newly formed polyploids in diploid populations of T. sidoides is also discussed.
format Artículo
author Kovalsky, Evelin Ivana
Solís Neffa, Viviana Griselda
author_facet Kovalsky, Evelin Ivana
Solís Neffa, Viviana Griselda
author_sort Kovalsky, Evelin Ivana
title Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex
title_short Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex
title_full Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex
title_fullStr Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex
title_full_unstemmed Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex
title_sort evidence of 2n microspore production in a natural diploid population of turnera sidoides subsp. carnea and its relevance in the evolution of the t. sidoides (turneraceae) autopolyploid complex
publisher Sociedad Botánica de Japón
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/59374
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AT solisneffavivianagriselda evidenceof2nmicrosporeproductioninanaturaldiploidpopulationofturnerasidoidessubspcarneaanditsrelevanceintheevolutionofthetsidoidesturneraceaeautopolyploidcomplex
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