Paige E. Panter
MUR1-mediated cell-wall fucosylation is required for freezing tolerance in Arabidopsis thaliana
Panter, Paige E.; Kent, Olivia; Dale, Maeve; Smith, Sarah J.; Skipsey, Mark; Thorlby, Glenn; Cummins, Ian; Ramsay, Nathan; Begum, Rifat A.; Sanhueza, Dayan; Fry, Stephen C.; Knight, Marc R.; Knight, Heather
Authors
Dr Olivia Kent olivia.v.kent@durham.ac.uk
Post Doctoral Research Associate
Maeve Dale
Sarah J. Smith
Mark Skipsey
Glenn Thorlby
Ian Cummins
Nathan Ramsay nathan.ramsay@durham.ac.uk
PGR Student Doctor of Philosophy
Rifat A. Begum
Dayan Sanhueza
Stephen C. Fry
Professor Marc Knight m.r.knight@durham.ac.uk
Professor
Professor Heather Knight p.h.knight@durham.ac.uk
Professor
Abstract
1.Forward genetic screens play a key role in the identification of genes contributing to plant stress tolerance. Using a screen for freezing sensitivity, we have identified a novel freezing tolerance gene, SENSITIVE TO FREEZING8, in Arabidopsis thaliana. 2.We identified SFR8 using recombination‐based mapping and whole‐genome sequencing. As SFR8 was predicted to have an effect on cell wall composition, we used GC‐MS and polyacrylamide gel electrophoresis to measure cell‐wall fucose and boron (B)‐dependent dimerisation of the cell‐wall pectic domain rhamnogalacturonan II (RGII) in planta. After treatments to promote borate‐bridging of RGII, we assessed freeze‐induced damage in wild‐type and sfr8 plants by measuring electrolyte leakage from freeze‐thawed leaf discs. 3.We mapped the sfr8 mutation to MUR1, a gene encoding the fucose biosynthetic enzyme GDP‐d‐mannose‐4,6‐dehydratase. sfr8 cell walls exhibited low cell‐wall fucose levels and reduced RGII bridging. Freezing sensitivity of sfr8 mutants was ameliorated by B supplementation, which can restore RGII dimerisation. B transport mutants with reduced RGII dimerisation were also freezing‐sensitive. 4.Our research identifies a role for the structure and composition of the plant primary cell wall in determining basal plant freezing tolerance and highlights the specific importance of fucosylation, most likely through its effect on the ability of RGII pectin to dimerise.
Citation
Panter, P. E., Kent, O., Dale, M., Smith, S. J., Skipsey, M., Thorlby, G., …Knight, H. (2019). MUR1-mediated cell-wall fucosylation is required for freezing tolerance in Arabidopsis thaliana. New Phytologist, 224(4), 1518-1531. https://doi.org/10.1111/nph.16209
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 28, 2019 |
Online Publication Date | Nov 7, 2019 |
Publication Date | Dec 1, 2019 |
Deposit Date | Aug 6, 2019 |
Publicly Available Date | Nov 7, 2019 |
Journal | New Phytologist |
Print ISSN | 0028-646X |
Electronic ISSN | 1469-8137 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 224 |
Issue | 4 |
Pages | 1518-1531 |
DOI | https://doi.org/10.1111/nph.16209 |
Public URL | https://durham-repository.worktribe.com/output/1291013 |
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Copyright Statement
© 2019 The Authors New Phytologist © 2019 New Phytologist Trust. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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