Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
191265
Reference Type
Journal Article
Title
Changes in the community of ectomycorrhizal fungi and increased fine root number under adult beech trees chronically fumigated with double ambient ozone concentration
Author(s)
Grebenc, T; Kraigher, H
Year
2007
Is Peer Reviewed?
Yes
Journal
Plant Biology
ISSN:
1435-8603
EISSN:
1438-8677
Volume
9
Issue
2
Page Numbers
279-287
Language
English
PMID
17006801
DOI
10.1055/s-2006-924489
Web of Science Id
WOS:000245251400011
URL
http://doi.wiley.com/10.1055/s-2006-924489
Exit
Abstract
Forest soils are an important but under-studied part of forest ecosystems. The effects of O-3 on below-ground processes in a mature forest have only received limited attention so far. in our study, we have analysed the community of ectomy-corrhizal fungi and beech fine root dynamics over two growing seasons (2003-2004) in a 70-year old mixed spruce-beech forest stand, in which two groups of five adult beech trees were either fumigated by 2 x ambient ozone concentration or used as control. The main difference between previous studies and our approach was that previous studies were performed on seedlings in pot experiments or in closed or open top chambers, and not in situ, in a mature forest stand. Although beech is a relatively unresponsive species to tropospheric O-3, we found a pronounced effect of 2 x O-3 on the number of vital ectomycorrhizal root tips and non-turgescent fine roots. Both categories of roots were significantly increased when compared to controls in two consecutive years at each sampling event. The number of types of ectomycorrhizae and species richness increased in 2004, but not in the extremely dry year 2003. We hypothesised that the observed changes might be an expression of a transitional state in below-ground succession of niches caused by an O-3 induced effect on carbon allocation to roots and the rhizosphere. We have detected changes in ectomycorrhizal species level, however Shannon-Weavers species diversity index and percentage of types of ectomycorrhizae did not change significantly in any sampling year thus indicating our results cannot be unequivocally explained by summer drought in year 2003 or by O-3 exposure alone.
Keywords
Ectomycorrhizal community; fine root number; 2 × ambient ozone; beech
Tags
NAAQS
•
ISA-Ozone (2013 Final Project Page)
Considered
Cited
1st Draft
2nd Draft
3rd Draft
Final
Health Effects
Eco/Welfare
•
ISA-Ozone (2020 Final Project Page)
Full-Text Screening Included
References from Other Sources
Included in ISA First Draft
Appendix 8
Included in ISA Final Draft
Appendix 8
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity