Chinese Science Bulletin

, Volume 54, Issue 2, pp 249–255 | Cite as

A meta-analysis of responses of wheat yield formation to elevated ozone concentration

  • ZhaoZhong FengEmail author
  • Kazuhiko Kobayashi
  • XiaoKe Wang
  • ZongWei Feng


The meta-analysis method was applied to quantitatively investigate effects of the elevated ozone concentration ([O3]) on chlorophyll concentration, gas exchange and yield components of wheat. There were 39 effective references through Web of Science (ISI, USA) and Chinese journal full-text database (CNKI, China). The results of meta-analysis indicated that elevated [O3] decreased grain yield, grain weight, grain number per ear, ear number per plant and harvest index by 26%, 18%, 11%, 5% and 11%, respectively, relative to ambient air. The decrease in leaf physiological characters was much greater than that in yield when wheat was expose to elevated [O3], while light-saturated photosynthetic rate (Asat), stomatal conductance (Gs) and chlorophyll content (Chl) decreased by 40%, 31%, and 46%, respectively. The responses to elevated [O3] between spring wheat and winter wheat were similar. Most of the variables showed a linear decrease trend with an increase of [O3]. The most significant decrease for Asat, Gs and Chl was found in grain filling stage. Elevated [CO2] could significantly ameliorated or offset the detrimental effects caused by elevated [O3].


meta-analysis elevated [CO2wheat ozone gas exchange yield 


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Copyright information

© Science in China Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • ZhaoZhong Feng
    • 1
    • 2
    Email author
  • Kazuhiko Kobayashi
    • 2
  • XiaoKe Wang
    • 1
  • ZongWei Feng
    • 1
  1. 1.State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina
  2. 2.Department of Global Agricultural Sciences, Graduate School of Agricultural and Life SciencesThe University of TokyoTokyoJapan

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