Scots pine (Pinus sylvestris) bark composition and degradation by fungi: Potential substrate for bioremediation

Lara Valentín*, Beata Kluczek-Turpeinen, Stefan Willför, Jarl Hemming, Annele Hatakka, Kari Steffen, Marja Tuomela

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

56 Citations (Scopus)

Abstract

The composition of Scots pine bark, its degradation, and the production of hydrolytic and ligninolytic enzymes were evaluated during 90 days of incubation with Phanerochaete velutina and Stropharia rugosoannulata. The aim was to evaluate if pine bark can be a suitable fungal substrate for bioremediation applications. The original pine bark contained 45% lignin, 25% cellulose, and 15% hemicellulose. Resin acids were the most predominant lipophilic extractives, followed by sitosterol and unsaturated fatty acids, such as linoleic and oleic acids. Both fungi degraded all main components of bark, specially cellulose (79% loss by P. velutina). During cultivation on pine bark, fungi also degraded sitosterol, produced malic acid, and oxidated unsaturated fatty acids. The most predominant enzymes produced by both fungi were cellulase and manganese peroxidase. The results indicate that Scots pine bark supports enzyme production and provides nutrients to fungi, thus pine bark may be suitable fungal substrate for bioremediation.

Original languageEnglish
Pages (from-to)2203-2209
Number of pages7
JournalBioresource Technology
Volume101
Issue number7
DOIs
Publication statusPublished - Apr 2010
MoE publication typeA1 Journal article-refereed

Keywords

  • Extractives
  • Hydrolytic enzymes
  • Manganese peroxidase
  • Phanerochaete velutina
  • Stropharia rugosoannulata

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