Ectomycorrhizal diversity, taxon-specific traits and root N uptake in temperate beech forests

© 2023 The Authors New Phytologist © 2023 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 239(2023), 2 vom: 25. Juli, Seite 739-751
1. Verfasser: Khokon, Anis Mahmud (VerfasserIn)
Weitere Verfasser: Janz, Dennis, Polle, Andrea
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Fagus sylvatica biodiversity ectomycorrhiza mineral nitrogen nutrition stable isotopes Nitrogen N762921K75
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520 |a Roots of forest trees are colonized by a diverse spectrum of ectomycorrhizal (EM) fungal species differing in their nitrogen (N) acquisition abilities. Here, we hypothesized that root N gain is the result of EM fungal diversity or related to taxon-specific traits for N uptake. To test our hypotheses, we traced 15 N enrichment in fine roots, coarse roots and taxon-specific ectomycorrhizas in temperate beech forests in two regions and three seasons, feeding 1 mM NH4 NO3 labelled with either 15 NH4 + or 15 NO3 - . We morphotyped > 45 000 vital root tips and identified 51 of 53 detected EM species by sequencing. EM root tips exhibited strong, fungal taxon-specific variation in 15 N enrichment with higher NH4 + than NO3 - enrichment. The translocation of N into the upper parts of the root system increased with increasing EM fungal diversity. Across the growth season, influential EM species predicting root N gain were not identified, probably due to high temporal dynamics of the species composition of EM assemblages. Our results support that root N acquisition is related to EM fungal community-level traits and highlight the importance of EM diversity for tree N nutrition 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Fagus sylvatica 
650 4 |a biodiversity 
650 4 |a ectomycorrhiza 
650 4 |a mineral nitrogen 
650 4 |a nutrition 
650 4 |a stable isotopes 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Janz, Dennis  |e verfasserin  |4 aut 
700 1 |a Polle, Andrea  |e verfasserin  |4 aut 
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