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A flat petal as ancestral state for Ranunculaceae

Ranunculaceae comprise ca. 2,500 species (ca. 55 genera) that display a broad range of floral diversity, particularly at the level of the perianth. Petals, when present, are often referred to as “elaborate” because they have a complex morphology. In addition, the petals usually produce and store nec...

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Autores principales: Delpeuch, Pauline, Jabbour, Florian, Damerval, Catherine, Schönenberger, Jürg, Pamperl, Susanne, Rome, Maxime, Nadot, Sophie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9532948/
https://www.ncbi.nlm.nih.gov/pubmed/36212342
http://dx.doi.org/10.3389/fpls.2022.961906
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author Delpeuch, Pauline
Jabbour, Florian
Damerval, Catherine
Schönenberger, Jürg
Pamperl, Susanne
Rome, Maxime
Nadot, Sophie
author_facet Delpeuch, Pauline
Jabbour, Florian
Damerval, Catherine
Schönenberger, Jürg
Pamperl, Susanne
Rome, Maxime
Nadot, Sophie
author_sort Delpeuch, Pauline
collection PubMed
description Ranunculaceae comprise ca. 2,500 species (ca. 55 genera) that display a broad range of floral diversity, particularly at the level of the perianth. Petals, when present, are often referred to as “elaborate” because they have a complex morphology. In addition, the petals usually produce and store nectar, which gives them a crucial functional role in the interaction with pollinators. Its morphological diversity and species richness make this family a particularly suitable model group for studying the evolution of complex morphologies. Our aims are (1) to reconstruct the ancestral form of the petal and evolutionary stages at the scale of Ranunculaceae, (2) to test the hypothesis that there are morphogenetic regions on the petal that are common to all species and that interspecific morphological diversity may be due to differences in the relative proportions of these regions during development. We scored and analyzed traits (descriptors) that characterize in detail the complexity of mature petal morphology in 32 genera. Furthermore, we described petal development using high resolution X-Ray computed tomography (HRX-CT) in six species with contrasting petal forms (Ficaria verna, Helleborus orientalis, Staphisagria picta, Aconitum napellus, Nigella damascena, Aquilegia vulgaris). Ancestral state reconstruction was performed using a robust and dated phylogeny of the family, allowing us to produce new hypotheses for petal evolution in Ranunculaceae. Our results suggest a flat ancestral petal with a short claw for the entire family and for the ancestors of all tribes except Adonideae. The elaborate petals that are present in different lineages have evolved independently, and similar morphologies are the result of convergent evolution.
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spelling pubmed-95329482022-10-06 A flat petal as ancestral state for Ranunculaceae Delpeuch, Pauline Jabbour, Florian Damerval, Catherine Schönenberger, Jürg Pamperl, Susanne Rome, Maxime Nadot, Sophie Front Plant Sci Plant Science Ranunculaceae comprise ca. 2,500 species (ca. 55 genera) that display a broad range of floral diversity, particularly at the level of the perianth. Petals, when present, are often referred to as “elaborate” because they have a complex morphology. In addition, the petals usually produce and store nectar, which gives them a crucial functional role in the interaction with pollinators. Its morphological diversity and species richness make this family a particularly suitable model group for studying the evolution of complex morphologies. Our aims are (1) to reconstruct the ancestral form of the petal and evolutionary stages at the scale of Ranunculaceae, (2) to test the hypothesis that there are morphogenetic regions on the petal that are common to all species and that interspecific morphological diversity may be due to differences in the relative proportions of these regions during development. We scored and analyzed traits (descriptors) that characterize in detail the complexity of mature petal morphology in 32 genera. Furthermore, we described petal development using high resolution X-Ray computed tomography (HRX-CT) in six species with contrasting petal forms (Ficaria verna, Helleborus orientalis, Staphisagria picta, Aconitum napellus, Nigella damascena, Aquilegia vulgaris). Ancestral state reconstruction was performed using a robust and dated phylogeny of the family, allowing us to produce new hypotheses for petal evolution in Ranunculaceae. Our results suggest a flat ancestral petal with a short claw for the entire family and for the ancestors of all tribes except Adonideae. The elaborate petals that are present in different lineages have evolved independently, and similar morphologies are the result of convergent evolution. Frontiers Media S.A. 2022-09-21 /pmc/articles/PMC9532948/ /pubmed/36212342 http://dx.doi.org/10.3389/fpls.2022.961906 Text en Copyright © 2022 Delpeuch, Jabbour, Damerval, Schönenberger, Pamperl, Rome and Nadot. 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
Delpeuch, Pauline
Jabbour, Florian
Damerval, Catherine
Schönenberger, Jürg
Pamperl, Susanne
Rome, Maxime
Nadot, Sophie
A flat petal as ancestral state for Ranunculaceae
title A flat petal as ancestral state for Ranunculaceae
title_full A flat petal as ancestral state for Ranunculaceae
title_fullStr A flat petal as ancestral state for Ranunculaceae
title_full_unstemmed A flat petal as ancestral state for Ranunculaceae
title_short A flat petal as ancestral state for Ranunculaceae
title_sort flat petal as ancestral state for ranunculaceae
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9532948/
https://www.ncbi.nlm.nih.gov/pubmed/36212342
http://dx.doi.org/10.3389/fpls.2022.961906
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