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Impact of elevated ozone concentration on growth, physiology, and yield of wheat (Triticum aestivum L.): a meta-analysis

Feng, Zhaozhong ; Kobayashi, Kazuhiko ; Ainsworth, Elizabeth A

Global change biology, 2008-11, Vol.14 (11), p.2696-2708 [Periódico revisado por pares]

Oxford, UK: Oxford, UK : Blackwell Publishing Ltd

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  • Título:
    Impact of elevated ozone concentration on growth, physiology, and yield of wheat (Triticum aestivum L.): a meta-analysis
  • Autor: Feng, Zhaozhong ; Kobayashi, Kazuhiko ; Ainsworth, Elizabeth A
  • Assuntos: air pollution ; Animal and plant ecology ; Animal, plant and microbial ecology ; Applied ecology ; atmospheric change ; Biological and medical sciences ; biomass ; chlorophyll ; drought ; Ecotoxicology, biological effects of pollution ; elevated [CO2] ; elevated atmospheric gases ; Fundamental and applied biological sciences. Psychology ; gas exchange ; General aspects ; global change ; grain quality ; grain yield ; Meta-analysis ; Ozone ; photosynthesis ; Plant biology ; Plant growth ; protein content ; stomata ; stomatal conductance ; Terrestrial environment, soil, air ; Triticum aestivum ; Wheat ; wheat protein ; yield component
  • É parte de: Global change biology, 2008-11, Vol.14 (11), p.2696-2708
  • Notas: http://hdl.handle.net/10113/40974
    http://dx.doi.org/10.1111/j.1365-2486.2008.01673.x
    ark:/67375/WNG-VSR2FPLJ-J
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    ArticleID:GCB1673
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
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    content type line 23
  • Descrição: We quantitatively evaluated the effects of elevated concentration of ozone (O₃) on growth, leaf chemistry, gas exchange, grain yield, and grain quality relative to carbon-filtered air (CF) by means of meta-analysis of published data. Our database consisted of 53 peer-reviewed studies published between 1980 and 2007, taking into account wheat type, O₃ fumigation method, rooting environment, O₃ concentration ([O₃]), developmental stage, and additional treatments such as drought and elevated carbon dioxide concentration ([CO₂]). The results suggested that elevated [O₃] decreased wheat grain yield by 29% (CI: 24-34%) and aboveground biomass by 18% (CI: 13-24%), where CI is the 95% confidence interval. Even in studies where the [O₃] range was between 31 and 59 ppb (average 43 ppb), there was a significant decrease in the grain yield (18%) and biomass (16%) relative to CF. Despite the increase in the grain protein content (6.8%), elevated [O₃] significantly decreased the grain protein yield (-18%). Relative to CF, elevated [O₃] significantly decreased photosynthetic rates (-20%), Rubisco activity (-19%), stomatal conductance (-22%), and chlorophyll content (-40%). For the whole plant, rising [O₃] induced a larger decrease in belowground (-27%) biomass than in aboveground (-18%) biomass. There was no significant response difference between spring wheat and winter wheat. Wheat grown in the field showed larger decreases in leaf photosynthesis parameters than wheat grown in < 5 L pots. Open-top chamber fumigation induced a larger reduction than indoor growth chambers, when plants were exposed to elevated [O₃]. The detrimental effect was progressively greater as the average daily [O₃] increased, with very few exceptions. The impact of O₃ increased with developmental stages, with the largest detrimental impact during grain filling. Both drought and elevated [CO₂] significantly ameliorated the detrimental effects of elevated [O₃], which could be explained by a significant decrease in O₃ uptake resulting from decreased stomatal conductance.
  • Editor: Oxford, UK: Oxford, UK : Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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