A belt for the cell: cellulosic wall thickenings and their role in morphogenesis of the 3D puzzle cells in walnut shells.

Szczegóły
Abstrakt

Tytuł:: A belt for the cell: cellulosic wall thickenings and their role in morphogenesis of the 3D puzzle cells in walnut shells.
Autorzy:: Antreich SJ; Department of Nanobiotechnology, Institute of Biophysics, University of Natural Resources and Life Sciences, Vienna, Austria.
Xiao N; Department of Nanobiotechnology, Institute of Biophysics, University of Natural Resources and Life Sciences, Vienna, Austria.
Huss JC; Department of Nanobiotechnology, Institute of Biophysics, University of Natural Resources and Life Sciences, Vienna, Austria.
Gierlinger N; Department of Nanobiotechnology, Institute of Biophysics, University of Natural Resources and Life Sciences, Vienna, Austria.
Źródło:: Journal of experimental botany [J Exp Bot] 2021 Jun 22; Vol. 72 (13), pp. 4744-4756.
Typ publikacji:: Journal Article; Research Support, Non-U.S. Gov't
Język:: English
Imprint Name(s):: Original Publication: Oxford, UK : Oxford University Press,
MeSH Terms:: Juglans*
Cell Wall ; Microscopy, Electron, Scanning ; Morphogenesis ; Pectins
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Grant Information:: 681885 International ERC_ European Research Council
Contributed Indexing:: Keywords: 3D imaging; 3D puzzle cells; Juglandaceae; Raman; SBF-SEM; interlocking; morphogenesis; nutshell; primary cell wall; sclerenchyma
Substance Nomenclature:: 89NA02M4RX (Pectins)
Entry Date(s):: Date Created: 20210508 Date Completed: 20210809 Latest Revision: 20210924
Update Code:: 20240105
PubMed Central ID:: PMC8219037
DOI:: 10.1093/jxb/erab197
PMID:: 33963747
: Czasopismo naukowe

Walnut (Juglans regia) kernels are protected by a tough shell consisting of polylobate sclereids that interlock into a 3D puzzle. The shape transformations from isodiametric to lobed cells is well documented for 2D pavement cells, but not for 3D puzzle sclereids. Here, we study the morphogenesis of these cells by using a combination of different imaging techniques. Serial face-microtomy enabled us to reconstruct tissue growth of whole walnut fruits in 3D, and serial block face-scanning electron microscopy exposed cell shapes and their transformation in 3D during shell tissue development. In combination with Raman and fluorescence microscopy, we revealed multiple loops of cellulosic thickenings in cell walls, acting as stiff restrictions during cell growth and leading to the lobed cell shape. Our findings contribute to a better understanding of the 3D shape transformation of polylobate sclereids and the role of pectin and cellulose within this process.
(© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology.)

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