The degree of acetylation affects the microbial degradability of mannans
2016 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 133, 36-46 p.Article in journal (Refereed) Published
Hemicelluloses as major components of plant cell walls are acetylated to different extents. The biologicalfunctions of acetylation are not completely understood but suggested that one reason is to decrease themicrobial degradability of cell walls. Model seed galactomannan and glucomannan, which are structurallysimilar to an abundant class of wood hemicelluloses, were acetylated to various degrees and usedas sole carbon source on agar plates for microbial growth. When soil samples were inoculated on theplates, significantly fewer strains grew on the agar plates with highly acetylated mannans than withslightly acetylated or non-acetylated mannans. One filamentous fungus isolated and identified as aPenicillium species was shown to grow faster and stronger on non-acetylated than on highly acetylatedmannan. The data therefore support the hypothesis that a high degree of acetylation (DSac) can decreasethe microbial degradability of hemicelluloses. Possible mechanisms and the technological significance ofthis are discussed.
Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 133, 36-46 p.
Wood biodegradation, Acetylation, Hemicellulose, Mannan, Microorganism, Biodegradability
IdentifiersURN: urn:nbn:se:kth:diva-192902DOI: 10.1016/j.polymdegradstab.2016.07.009OAI: oai:DiVA.org:kth-192902DiVA: diva2:972826
FunderKnut and Alice Wallenberg Foundation
QC 201609262016-09-222016-09-222016-09-27Bibliographically approved