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PIRIN2 suppresses S-type lignin accumulation in a noncell-autonomous manner in Arabidopsis xylem elements
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology.
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).ORCID iD: 0000-0001-7049-6978
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2019 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137Article in journal (Refereed) Epub ahead of print
Abstract [en]
  • PIRIN (PRN) genes encode cupin domain‐containing proteins that function as transcriptional co‐regulators in humans but that are poorly described in plants. A previous study in xylogenic cell cultures of Zinnia elegans suggested a role for a PRN protein in lignification. This study aimed to identify the function of Arabidopsis (Arabidopsis thaliana) PRN proteins in lignification of xylem tissues.
  • Chemical composition of the secondary cell walls was analysed in Arabidopsis stems and/or hypocotyls by pyrolysis–gas chromatography/mass spectrometry, 2D‐nuclear magnetic resonance and phenolic profiling. Secondary cell walls of individual xylem elements were chemotyped by Fourier transform infrared and Raman microspectroscopy.
  • Arabidopsis PRN2 suppressed accumulation of S‐type lignin in Arabidopsis stems and hypocotyls. PRN2 promoter activity and PRN2:GFP fusion protein were localised specifically in cells next to the vessel elements, suggesting a role for PRN2 in noncell‐autonomous lignification of xylem vessels. Accordingly, PRN2 modulated lignin chemistry in the secondary cell walls of the neighbouring vessel elements.
  • These results indicate that PRN2 suppresses S‐type lignin accumulation in the neighbourhood of xylem vessels to bestow G‐type enriched lignin composition on the secondary cell walls of the vessel elements. Gene expression analyses suggested that PRN2 function is mediated by regulation of the expression of the lignin‐biosynthetic genes.
Place, publisher, year, edition, pages
New Phytologist Trust , 2019.
Keywords [en]
Arabidopsis, lignification, noncell-autonomy, PIRIN, xylem vessel element
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:umu:diva-165740DOI: 10.1111/nph.16271ISI: 000495547800001PubMedID: 31625609OAI: oai:DiVA.org:umu-165740DiVA, id: diva2:1376691
Funder
Swedish Research Council, 232-2011-1312Swedish Research Council Formas, 232-2011-1312Swedish Foundation for Strategic Research , RBP14-0011Vinnova, 201600504Knut and Alice Wallenberg Foundation, 20160341Bio4EnergyAvailable from: 2019-12-10 Created: 2019-12-10 Last updated: 2019-12-10

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Zhang, BoSztojka, BernadetteEscamez, SachaHedenström, MattiasWang, YinGorzsás, AndrásTuominen, Hannele

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Zhang, BoSztojka, BernadetteEscamez, SachaHedenström, MattiasWang, YinGorzsás, AndrásTuominen, Hannele
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