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Deposition and organisation of cell wall polymers during maturation of poplar tension wood by FTIR microspectroscopy
Université Montpellier, France.
RISE, Innventia.ORCID iD: 0000-0003-3534-1107
RISE, Innventia.
Université Montpellier, France.
2014 (English)In: Planta, ISSN 0032-0935, E-ISSN 1432-2048, Vol. 239, no 1, p. 243-254Article in journal (Refereed) Published
Abstract [en]

To advance our understanding of the formation of tension wood, we investigated the macromolecular arrangement in cell walls by Fourier transform infrared microspectroscopy (FTIR) during maturation of tension wood in poplar (Populus tremula x P. alba, clone INRA 717-1B4). The relation between changes in composition and the deposition of the G-layer in tension wood was analysed. Polarised FTIR measurements indicated that in tension wood, already before G-layer formation, a more ordered structure of carbohydrates at an angle more parallel to the fibre axis exists. This was clearly different from the behaviour of opposite wood. With the formation of the S2 layer in opposite wood and the G-layer in tension wood, the orientation signals from the amorphous carbohydrates like hemicelluloses and pectins were different between opposite wood and tension wood. For tension wood, the orientation for these bands remains the same all along the cell wall maturation process, probably reflecting a continued deposition of xyloglucan or xylan, with an orientation different to that in the S2 wall throughout the whole process. In tension wood, the lignin was more highly oriented in the S2 layer than in opposite wood.

Place, publisher, year, edition, pages
2014. Vol. 239, no 1, p. 243-254
National Category
Wood Science
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URN: urn:nbn:se:ri:diva-9452DOI: 10.1007/s00425-013-1980-3OAI: oai:DiVA.org:ri-9452DiVA, id: diva2:968162
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2019-12-12Bibliographically approved

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Salmen, Lennart

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