Leroux, O, Eder, M, Saxe, F et al. (4 more authors) (2018) Comparative in situ analysis reveals the dynamic nature of sclerenchyma cell walls of the fern Asplenium rutifolium. Annals of Botany, 121 (2). pp. 345-358. ISSN 0305-7364
Abstract
Background and Aims: A key structural adaptation of vascular plants was the evolution of specialized vascular and mechanical tissues, innovations likely to have generated novel cell wall architectures. While collenchyma is a strengthening tissue typically found in growing organs of angiosperms, a similar tissue occurs in the petiole of the fern Asplenium rutifolium. Methods: The in situ cell wall (ultra)structure and composition of this tissue was investigated and characterized mechanically as well as structurally through nano-indentation and wide-angle X-ray diffraction, respectively. Key Results: Structurally the mechanical tissue resembles sclerenchyma, while its biomechanical properties and molecular composition both share more characteristics with angiosperm collenchyma. Cell wall thickening only occurs late during cell expansion or after cell expansion has ceased. Conclusions: If the term collenchyma is reserved for walls that thicken during expansive growth, the mechanical tissue in A. rutifolium represents sclerenchyma that mimics the properties of collenchyma and has the ability to modify its mechanical properties through sclerification. These results support the view that collenchyma does not occur in ferns and most probably evolved in angiosperms.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017, The Author(s). Published by Oxford University Press on behalf of the Annals of Botany Company. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Annals of Botany following peer review. The version of record: Olivier Leroux, Michaela Eder, Friederike Saxe, John W C Dunlop, Zoë A Popper, Ronald L L Viane, J Paul Knox; Comparative in situ analysis reveals the dynamic nature of sclerenchyma cell walls of the fern Asplenium rutifolium, Annals of Botany, Volume 121, Issue 2, 12 February 2018, Pages 345–358, is available online at: https://doi.org/10.1093/aob/mcx167 |
Keywords: | Asplenium rutifolium; collenchyma; mannan; nano-indentation; primary cell wall; secondary cell wall; sclerenchyma; septate fibres; xyloglucan |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Biology (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Jan 2018 13:28 |
Last Modified: | 23 Dec 2018 01:38 |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/aob/mcx167 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125739 |