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Summary Studies on juvenile individuals under artificial environments dominate knowledge about the sensitivity of trees to O3. Field approaches based on free-air O3 fumigations of adult forest trees are a novel choice. Such a case study on beech and spruce (at the Kranzberg Forest near Munich, Germany) is used to address four long-standing issues in O3 research: (1) Can a “unifying theory” of O3 sensitivity...
•Increasing atmospheric concentrations of phytotoxic ozone (O3) can constrain growth and carbon sink strength of forest trees, potentially exacerbating global radiative forcing. Despite progress in the conceptual understanding of the impact of O3 on plants, it is still difficult to detect response patterns at the leaf level.
•Here, we employed principal component analysis (PCA) to analyse a database...
The response of antioxidative defence systems in flag leaf tissues of wheat to combinations of ozone and drought stress was investigated. Sensitive (Triticum aestivum Desf. cv. Nandu) and resistant (Triticum durum L. cv. Extradur) cultivars of wheat were grown in open-top chambers under two ozone (ambient; ambient plus 50 ppb) and two water regimes (well-watered and 40% of soil water capacity). Concentrations...
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