Temperature-respiration relationships differ in mycorrhizal and non-mycorrhizal root systems of Picea abies (L.) Karst.

N. Koch, C. P. Andersen, S. Raidl, R. Agerer, R. Matyssek, T. E.E. Grams

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Root respiration has been shown to increase with temperature, but less is known about how this relationship is affected by the fungal partner in mycorrhizal root systems. In order to test respiratory temperature dependence, in particular Q10 of mycorrhizal and non-mycorrhizal root systems, seedlings of Picea abies (L.) Karst. (Norway spruce) were inoculated with the ectomycorrhizal fungus Piloderma croceum (Eriksson and Hjortstam, SR430; synonym: Piloderma fallax: [Libert] Stalpers) and planted in soil respiration cuvettes (mycocosms). Temperature dependence of hyphal respiration in sterile cultures was determined and compared with respiration of mycorrhizal roots. Respiration rates of mycorrhizal and non-mycorrhizal root systems as well as sterile cultures were sensitive to temperature. Q10 of mycorrhizal root systems of 3.0±0.1 was significantly higher than that of non-mycorrhizal systems (2.5±0.2). Q10 of P. croceum in sterile cultures (older than 2 months) was similar to that of mycorrhizal root systems, suggesting that mycorrhizae may have a large influence on the temperature sensitivity of roots in spite of their small biomass. Our results stress the importance of considering mycorrhization when modeling the temperature sensitivity of spruce roots.

Original languageEnglish
Pages (from-to)545-549
Number of pages5
JournalPlant Biology
Volume9
Issue number4
DOIs
StatePublished - Jul 2007

Keywords

  • Mycorrhizal respiration
  • Picea abies (L.) Karst. (Norway spruce)
  • Piloderma croceum
  • Q
  • Root respiration
  • Temperature dependence

Fingerprint

Dive into the research topics of 'Temperature-respiration relationships differ in mycorrhizal and non-mycorrhizal root systems of Picea abies (L.) Karst.'. Together they form a unique fingerprint.

Cite this