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Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies
Plants are exposed to various external stresses influencing physiology, anatomy, and morphology. Shape, geometry, and size of shoots and leaves are particularly affected. Among the latter, peltate leaves are not very common and so far, only few studies focused on their properties. In this case study...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738572/ https://www.ncbi.nlm.nih.gov/pubmed/36501333 http://dx.doi.org/10.3390/plants11233297 |
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author | Rjosk, Annabell Neinhuis, Christoph Lautenschläger, Thea |
author_facet | Rjosk, Annabell Neinhuis, Christoph Lautenschläger, Thea |
author_sort | Rjosk, Annabell |
collection | PubMed |
description | Plants are exposed to various external stresses influencing physiology, anatomy, and morphology. Shape, geometry, and size of shoots and leaves are particularly affected. Among the latter, peltate leaves are not very common and so far, only few studies focused on their properties. In this case study, four Begonia species with different leaf shapes and petiole attachment points were analyzed regarding their leaf morphology, anatomy, and biomechanical properties. One to two plants per species were examined. In all four species, the petiole showed differently sized vascular bundles arranged in a peripheral ring and subepidermal collenchyma. These anatomical characteristics, low leaf dry mass, and low amount of lignified tissue in the petiole point toward turgor pressure as crucial for leaf stability. The petiole-lamina transition zone shows a different organization in leaves with a more central (peltate) and lateral petiole insertion. While in non-peltate leaves simple fiber branching is present, peltate leaves show a more complex reticulate fiber arrangement. Tensile and bending tests revealed similar structural Young’s moduli in all species for intercostal areas and venation, but differences in the petiole. The analysis of the leaves highlights the properties of petiole and the petiole-lamina transition zone that are needed to resist external stresses. |
format | Online Article Text |
id | pubmed-9738572 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-97385722022-12-11 Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies Rjosk, Annabell Neinhuis, Christoph Lautenschläger, Thea Plants (Basel) Article Plants are exposed to various external stresses influencing physiology, anatomy, and morphology. Shape, geometry, and size of shoots and leaves are particularly affected. Among the latter, peltate leaves are not very common and so far, only few studies focused on their properties. In this case study, four Begonia species with different leaf shapes and petiole attachment points were analyzed regarding their leaf morphology, anatomy, and biomechanical properties. One to two plants per species were examined. In all four species, the petiole showed differently sized vascular bundles arranged in a peripheral ring and subepidermal collenchyma. These anatomical characteristics, low leaf dry mass, and low amount of lignified tissue in the petiole point toward turgor pressure as crucial for leaf stability. The petiole-lamina transition zone shows a different organization in leaves with a more central (peltate) and lateral petiole insertion. While in non-peltate leaves simple fiber branching is present, peltate leaves show a more complex reticulate fiber arrangement. Tensile and bending tests revealed similar structural Young’s moduli in all species for intercostal areas and venation, but differences in the petiole. The analysis of the leaves highlights the properties of petiole and the petiole-lamina transition zone that are needed to resist external stresses. MDPI 2022-11-29 /pmc/articles/PMC9738572/ /pubmed/36501333 http://dx.doi.org/10.3390/plants11233297 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Rjosk, Annabell Neinhuis, Christoph Lautenschläger, Thea Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies |
title | Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies |
title_full | Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies |
title_fullStr | Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies |
title_full_unstemmed | Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies |
title_short | Anatomy and Biomechanics of Peltate Begonia Leaves—Comparative Case Studies |
title_sort | anatomy and biomechanics of peltate begonia leaves—comparative case studies |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738572/ https://www.ncbi.nlm.nih.gov/pubmed/36501333 http://dx.doi.org/10.3390/plants11233297 |
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