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Do chronic aboveground O₃ exposure and belowground pathogen stress affect growth and belowground biomass partitioning of juvenile beech trees (Fagus sylvatica L.)?
Plant Soil 332, (Sp. Iss. SI), 31-44 (2009)
The impact of chronic free air ozone (O-3) exposure and belowground pathogen stress on growth and total biomass development of young beech trees (Fagus sylvatica L.) was investigated in a lysimeter study. Plants were growing during four years under ambient or elevated atmospheric O-3 concentrations. Additionally, in the last vegetation period the root rot pathogen Phytophthora citricola was introduced to study the interaction of ozone exposure and pathogen stress in the soil-plant system. A complete harvest at the end of the experiment enabled for the first time the assessment of fine and coarse root biomass of individual trees with a high vertical resolution down to two meter depth. Plant growth was significantly reduced by elevated ozone but not affected by P. citricola. Biomass partitioning between fine and coarse roots as well as vertical root distribution were significantly affected by both factors, whereas changes in root/shoot biomass ratio were not observed.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Free air ozone enrichment; Beech; Plant growth; Root biomass; FINE-ROOT BIOMASS; ELEVATED ATMOSPHERIC CO-2; PHYTOPHTHORA-CITRICOLA; TROPOSPHERIC O-3; EUROPEAN BEECH; YOUNG BEECH; CHANGING ENVIRONMENT; ECOSYSTEM-LEVEL; GROWING SEASONS; TREMBLING ASPEN
ISSN (print) / ISBN
0032-079X
e-ISSN
1573-5036
Journal
Plant and Soil
Quellenangaben
Volume: 332,
Issue: 1-2,
Pages: 31-44,
Supplement: (Sp. Iss. SI)
Publisher
Springer
Publishing Place
Dordrecht, NL
Reviewing status
Peer reviewed