Sammanfattning

Although hypothesized for many years, the involvement of ectomycorrhizal fungi in decomposition of soil organic matter remains controversial and has not yet been fully acknowledged as an important factor in the regulation of soil carbon (C) storage. Here, we review recent findings, which support the view that some ectomycorrhizal fungi have the capacity to oxidize organic matter, either by brown-rot' Fenton chemistry or using white-rot' peroxidases. We propose that ectomycorrhizal fungi benefit from organic matter decomposition primarily through increased nitrogen mobilization rather than through release of metabolic C and question the view that ectomycorrhizal fungi may act as facultative saprotrophs. Finally, we discuss how mycorrhizal decomposition may influence organic matter storage in soils and mediate responses of ecosystem C sequestration to environmental changes.

Nyckelord

carbon sequestration; decomposition; ectomycorrhiza; nitrogen cycling; organic matter oxidation; priming effect

Publicerad i

New Phytologist
2015, Volym: 205, nummer: 4, sidor: 1443-1447
Utgivare: WILEY-BLACKWELL

SLU författare

• Lindahl, Björn

  • Institutionen för mark och miljö, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Ekologi
Mikrobiologi


Publikationens identifierare

DOI: https://doi.org/10.1111/nph.13201

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/66280