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Plessl, M.* ; Heller, W. ; Payer, H.-D. ; Elstner, E.F.* ; Habermeyer, J.* ; Heiser, I.*

Growth Parameters and Resistance against Drechslera teres of Spring barley (Hordeum vulgare L.cv.Scarlett) Grown at elevated Ozone and Carbon Dioxide Concentrations.

Plant Biol. 7, 694-705 (2005)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Spring barley ( Hordeum vulgare L. cv. Scarlett) was grown at two CO2 levels (400 vs. 700 ppm) combined with two ozone regimes (ambient vs. double ambient) in climate chambers for four weeks, beginning at seedling emergence. Elevated CO2 concentration significantly increased aboveground biomass, root biomass, and tiller number, whereas double ambient ozone significantly decreased these parameters. These ozone-induced reductions in growth parameters were strongly overridden by 700 ppm CO2. The elevated CO2 level increased C : N ratio of the leaf tissue and leaf starch content but decreased leaf protein levels. Exposure to double ambient ozone did not affect protein content and C : N ratio but dramatically increased leaf starch levels at 700 ppm CO2. Resistance against Drechslera teres (Sacc.) Shoemaker was increased in leaves grown at double ambient ozone but was less obvious at 700 ppm than at 400 ppm CO2. Constitutive activities of beta-1,3-glucanase and chitinase were significantly higher in leaves grown at double ambient ozone compared to ambient ozone levels. The sum of methanol-soluble and alkali-released cell wall-bound aromatic metabolites (i.e., C-glycosylflavones and several structurally unidentified metabolites) and lignin contents did not show any treatment-dependent differences.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Ascomycota/physiology*; Carbon Dioxide/pharmacology*; History, 21st Century; Hordeum/drug effects*; Hordeum/enzymology; Hordeum/growth & development*; Hordeum/microbiology Lignin/metabolism; Ozone/pharmacology*; Phenols/metabolism; Plant Diseases/microbiology*; Starch/metabolism; Time Factors
ISSN (print) / ISBN 1435-8603
e-ISSN 1438-8677
Journal Plant Biology
Quellenangaben Volume: 7, Issue: 6, Pages: 694-705 Article Number: , Supplement: ,
Publisher Wiley
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Research Unit Environmental Simulation (BIOP-EUS)
Institute of Biochemical Plant Pathology (BIOP)