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Cellular level chemical changes in Scots pine heartwood during incipient brown rot decay

Belt, Tiina and Altgen, Michael and Mäkelä, Mikko and Hanninen, Tuomas and Rautkari, Lauri (2019). Cellular level chemical changes in Scots pine heartwood during incipient brown rot decay. Scientific Reports. 9 , 5188
[Research article]

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Abstract

The heartwoods of many wood species have natural resistance to wood decay due to the accumulation of antifungal heartwood extractives. The natural durability of heartwoods has been extensively investigated, yet very little information is available on the initiation of heartwood decay. This experiment examined the onset of Rhodonia placenta brown rot decay in Scots pine heartwood in order to identify the key changes leading to heartwood decay. An imaging approach based on Raman imaging and multivariate image analysis revealed that the degradation of heartwood began in the innermost cell wall layers and then spread into the remaining cell walls and the middle lamella. Pinosylvins were extensively degraded in the cell walls, middle lamella and extractive deposits, while unidentified material most likely consisting of hemicelluloses and/or lipophilic extractives was removed from the inner cell wall layers. Changes similar to inner cell wall degradation were seen in the remaining cell walls in more advanced decay. The results indicate that the key change in incipient heartwood decay is the degradation of antifungal heartwood extractives. The inner cell wall degradation seen in this experiment may serve a nutritive purpose or facilitate the penetration of degradative agents into the cell walls and middle lamella.

Authors/Creators:Belt, Tiina and Altgen, Michael and Mäkelä, Mikko and Hanninen, Tuomas and Rautkari, Lauri
Title:Cellular level chemical changes in Scots pine heartwood during incipient brown rot decay
Series Name/Journal:Scientific Reports
Year of publishing :2019
Volume:9
Article number:5188
Number of Pages:10
Publisher:NATURE PUBLISHING GROUP
ISSN:2045-2322
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
URN:NBN:urn:nbn:se:slu:epsilon-p-112407
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112407
Additional ID:
Type of IDID
DOI10.1038/s41598-019-41735-8
Web of Science (WoS)000462298600075
ID Code:24556
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:17 Jun 2021 10:43
Metadata Last Modified:17 Jun 2021 10:51

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