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Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress

Susceptibility of the reproductive system to temperature fluctuations is a recurrent problem for crop production under a changing climate. The damage is complex as multiple processes in male and female gamete formation are affected, but in general, particularly pollen production is impaired. Here, t...

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Autores principales: Schindfessel, Cédric, De Storme, Nico, Trinh, Hoang Khai, Geelen, Danny
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10373595/
https://www.ncbi.nlm.nih.gov/pubmed/37521921
http://dx.doi.org/10.3389/fpls.2023.1210092
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author Schindfessel, Cédric
De Storme, Nico
Trinh, Hoang Khai
Geelen, Danny
author_facet Schindfessel, Cédric
De Storme, Nico
Trinh, Hoang Khai
Geelen, Danny
author_sort Schindfessel, Cédric
collection PubMed
description Susceptibility of the reproductive system to temperature fluctuations is a recurrent problem for crop production under a changing climate. The damage is complex as multiple processes in male and female gamete formation are affected, but in general, particularly pollen production is impaired. Here, the impact of short periods of elevated temperature on male meiosis of tomato (Solanum lycopersicon L.) is reported. Meiocytes in early stage flower buds exposed to heat stress (>35°C) exhibit impaired homolog synapsis resulting in partial to complete omission of chiasmata formation. In the absence of chiasmata, univalents segregate randomly developing unbalanced tetrads and polyads resulting in aneuploid spores. However, most heat-stressed meiotic buds primarily contain balanced dyads, indicating a propensity to execute meiotic restitution. With most meiocytes exhibiting a complete loss of chiasma formation and concomitantly showing a mitotic-like division, heat stress triggers first division restitution resulting in clonal spores. These findings corroborate with the plasticity of male meiosis under heat and establish a natural route for the induction of sexual polyploidization in plants and the engineering of clonal seed.
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spelling pubmed-103735952023-07-28 Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress Schindfessel, Cédric De Storme, Nico Trinh, Hoang Khai Geelen, Danny Front Plant Sci Plant Science Susceptibility of the reproductive system to temperature fluctuations is a recurrent problem for crop production under a changing climate. The damage is complex as multiple processes in male and female gamete formation are affected, but in general, particularly pollen production is impaired. Here, the impact of short periods of elevated temperature on male meiosis of tomato (Solanum lycopersicon L.) is reported. Meiocytes in early stage flower buds exposed to heat stress (>35°C) exhibit impaired homolog synapsis resulting in partial to complete omission of chiasmata formation. In the absence of chiasmata, univalents segregate randomly developing unbalanced tetrads and polyads resulting in aneuploid spores. However, most heat-stressed meiotic buds primarily contain balanced dyads, indicating a propensity to execute meiotic restitution. With most meiocytes exhibiting a complete loss of chiasma formation and concomitantly showing a mitotic-like division, heat stress triggers first division restitution resulting in clonal spores. These findings corroborate with the plasticity of male meiosis under heat and establish a natural route for the induction of sexual polyploidization in plants and the engineering of clonal seed. Frontiers Media S.A. 2023-07-13 /pmc/articles/PMC10373595/ /pubmed/37521921 http://dx.doi.org/10.3389/fpls.2023.1210092 Text en Copyright © 2023 Schindfessel, De Storme, Trinh and Geelen https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Schindfessel, Cédric
De Storme, Nico
Trinh, Hoang Khai
Geelen, Danny
Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress
title Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress
title_full Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress
title_fullStr Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress
title_full_unstemmed Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress
title_short Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress
title_sort asynapsis and meiotic restitution in tomato male meiosis induced by heat stress
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10373595/
https://www.ncbi.nlm.nih.gov/pubmed/37521921
http://dx.doi.org/10.3389/fpls.2023.1210092
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