Universität zu Köln

Rosinger, Christoph ORCID: 0000-0002-4973-3921, Sanden, Hans ORCID: 0000-0002-2496-6307 and Godbold, Douglas L. (2020). Non-structural carbohydrate concentrations of Fagus sylvatica and Pinus sylvestris fine roots are linked to ectomycorrhizal enzymatic activity during spring reactivation. Mycorrhiza, 30 (2-3). S. 197 - 211. NEW YORK: SPRINGER. ISSN 1432-1890

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Abstract

We evaluated whether changes in fine root non-structural carbohydrate reserves of Fagus sylvatica and Pinus sylvestris trees influence potential enzymatic activities of their ectomycorrhizal symbionts from winter towards spring reactivation, and whether these changes influence potential soil enzymatic activities. We analyzed sugar and starch concentrations in the fine roots of Fagus sylvatica and Pinus sylvestris and potential activities of ss-glucosidase, ss-xylosidase, and cellobiohydrolase (as proxies for carbon-degrading enzymes) as well as leucine aminopeptidase and chitinase (as proxies for nitrogen-degrading enzymes) of their dominant ectomycorrhizal symbionts as well as in the soil. Sugar concentrations in the fine roots were significantly positively correlated with enzymatic activities of the ectomycorrhizal symbionts. In Pinus sylvestris, both carbon- and nitrogen-degrading enzyme activities showed significant positive correlations with fine root sugar concentrations. In Fagus sylvatica, fine root sugar concentrations were explicitly positively correlated with the activity of nitrogen-degrading enzymes. The chitinase activity in the soil was found to be strongly positively correlated with the enzymatic activity of the ectomycorrhizal symbionts as well as with fine root sugar concentrations. Fine root carbohydrate concentrations of Fagus sylvatica and Pinus sylvestris trees and enzymatic activities of their associated ectomycorrhizal fungi are connected. The specific nutrient demand of the tree species during spring reactivation may affect ectomycorrhizal enzymatic activity via carbon mobilization in the fine roots of Fagus sylvatica and Pinus sylvestris. Moreover, our results suggest that trees indirectly contribute to the degradation of fungal necromass by stimulating ectomycorrhizal chitinase activity in the soil.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rosinger, Christoph UNSPECIFIED orcid.org/0000-0002-4973-3921 UNSPECIFIED Sanden, Hans UNSPECIFIED orcid.org/0000-0002-2496-6307 UNSPECIFIED Godbold, Douglas L. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-344456
DOI:	10.1007/s00572-020-00939-x
Journal or Publication Title:	Mycorrhiza
Volume:	30
Number:	2-3
Page Range:	S. 197 - 211
Date:	2020
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-1890
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TEMPERATE FOREST; MYCORRHIZAL FUNGI; CHITINOLYTIC ENZYMES; CENOCOCCUM-GEOPHILUM; SEASONAL-VARIATION; CARBON LIMITATION; SOIL FACTORS; NITROGEN; DYNAMICS; TREES Multiple languages Mycology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/34445