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000003492 0247_ $$2DOI$$a10.1093/treephys/tpp009
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000003492 084__ $$2WoS$$aForestry
000003492 1001_ $$0P:(DE-HGF)0$$aBehnke, K.$$b0
000003492 245__ $$aRNAi-mediated suppression of isoprene biosynthesis in hybrid poplar impacts ozone tolerance
000003492 260__ $$aVictoria, BC$$bHeron$$c2009
000003492 300__ $$a725 - 736
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000003492 440_0 $$016581$$aTree Physiology$$v29$$x0829-318X$$y5
000003492 500__ $$aThe authors thank Ursula Scheerer for ascorbate and glutathione analyses and Sandrine Louis for helpful comments on the manuscript. This work was supported by the German Science Foundation (DFG) (SCHN653/4 to J.-P.S., RE515/20 to H.R.) within the German joint research group 'Poplar - A Model to Address Tree-Specific Questions'.
000003492 520__ $$aIsoprene is the most abundant volatile compound emitted by vegetation. It influences air chemistry and is thought to take part in plant defense reactions against abiotic stress such as high temperature or ozone. However, whether or not isoprene emission impacts ozone tolerance of plants is still in discussion. In this study, we exploited the transgenic non-isoprene emitting grey poplar (Populus x canescens (Aiton) Sm.) in a biochemical and physiological model study to investigate the effect of acute ozone stress on the elicitation of defense-related emissions of plant volatiles, on photosynthesis and on the antioxidative system. We recorded that non-isoprene emitting poplars were more resistant to ozone as indicated by less damaged leaf area and higher assimilation rates compared to ozone-exposed wild-type (WT) plants. The integral of green leaf volatile emissions was different between the two poplar phenotypes and was a reliable early marker for subsequent leaf damage. For other stress-induced volatiles, such as mono-, homo- and sesquiterpenes and methyl salicylate, similar time profiles, pattern and emission intensities were observed in both transgenic and WT plants. However, unstressed non-isoprene emitting poplars are characterized by elevated levels of ascorbate and alpha-tocopherol as well as by a more effective de-epoxidation ratio of xanthophylls than the WT. Since ozone quenching properties of ascorbate are much higher than those of isoprene and furthermore alpha-tocopherol is also an essential antioxidant, non-isoprene emitting poplars might benefit from changes within the antioxidative system by providing them with enhanced ozone tolerance.
000003492 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
000003492 588__ $$aDataset connected to Web of Science, Pubmed
000003492 65320 $$2Author$$aantioxidants
000003492 65320 $$2Author$$aascorbate
000003492 65320 $$2Author$$abiogenic volatile organic compounds
000003492 65320 $$2Author$$agreen leaf volatiles
000003492 65320 $$2Author$$aphotosynthesis
000003492 65320 $$2Author$$aalpha-tocopherol
000003492 650_2 $$2MeSH$$aAntioxidants: metabolism
000003492 650_2 $$2MeSH$$aButadienes
000003492 650_2 $$2MeSH$$aCarbon Dioxide: metabolism
000003492 650_2 $$2MeSH$$aHemiterpenes: biosynthesis
000003492 650_2 $$2MeSH$$aHemiterpenes: genetics
000003492 650_2 $$2MeSH$$aHybridization, Genetic
000003492 650_2 $$2MeSH$$aModels, Biological
000003492 650_2 $$2MeSH$$aOxidative Stress
000003492 650_2 $$2MeSH$$aOzone: pharmacology
000003492 650_2 $$2MeSH$$aPentanes
000003492 650_2 $$2MeSH$$aPlant Leaves: drug effects
000003492 650_2 $$2MeSH$$aPlant Leaves: genetics
000003492 650_2 $$2MeSH$$aPlant Leaves: metabolism
000003492 650_2 $$2MeSH$$aPlant Stomata: metabolism
000003492 650_2 $$2MeSH$$aPlant Transpiration: drug effects
000003492 650_2 $$2MeSH$$aPlants, Genetically Modified: drug effects
000003492 650_2 $$2MeSH$$aPlants, Genetically Modified: metabolism
000003492 650_2 $$2MeSH$$aPopulus: drug effects
000003492 650_2 $$2MeSH$$aPopulus: genetics
000003492 650_2 $$2MeSH$$aPopulus: metabolism
000003492 650_2 $$2MeSH$$aRNA Interference
000003492 650_7 $$00$$2NLM Chemicals$$aAntioxidants
000003492 650_7 $$00$$2NLM Chemicals$$aButadienes
000003492 650_7 $$00$$2NLM Chemicals$$aHemiterpenes
000003492 650_7 $$00$$2NLM Chemicals$$aPentanes
000003492 650_7 $$010028-15-6$$2NLM Chemicals$$aOzone
000003492 650_7 $$0124-38-9$$2NLM Chemicals$$aCarbon Dioxide
000003492 650_7 $$078-79-5$$2NLM Chemicals$$aisoprene
000003492 650_7 $$2WoSType$$aJ
000003492 7001_ $$0P:(DE-Juel1)129345$$aKleist, E.$$b1$$uFZJ
000003492 7001_ $$0P:(DE-Juel1)VDB56253$$aUerlings, R.$$b2$$uFZJ
000003492 7001_ $$0P:(DE-Juel1)VDB1780$$aWildt, J.$$b3$$uFZJ
000003492 7001_ $$0P:(DE-HGF)0$$aRennenberg, H.$$b4
000003492 7001_ $$0P:(DE-Juel1)VDB4703$$aSchnitzler, J.-P.$$b5$$uFZJ
000003492 773__ $$0PERI:(DE-600)1473475-8$$a10.1093/treephys/tpp009$$gVol. 29, p. 725 - 736$$p725 - 736$$q29<725 - 736$$tTree physiology$$v29$$x0829-318X$$y2009
000003492 8567_ $$uhttp://dx.doi.org/10.1093/treephys/tpp009
000003492 8564_ $$uhttps://juser.fz-juelich.de/record/3492/files/FZJ-3492.pdf$$yRestricted$$zPublished final document.
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