Will elevated CO2 concentrations protect the yield of wheat from O3 damage?

Authors

  • I. F. MCKEE,

    Corresponding author
    1. Department of Biological and Chemical Sciences, John Tabor Laboratories, University of Essex, Wivenhoe Park, Colchester Essex CO4 3SQ, UK
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  • J. F. BULLIMORE,

    1. Department of Biological and Chemical Sciences, John Tabor Laboratories, University of Essex, Wivenhoe Park, Colchester Essex CO4 3SQ, UK
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  • S. P. LONG

    1. Department of Biological and Chemical Sciences, John Tabor Laboratories, University of Essex, Wivenhoe Park, Colchester Essex CO4 3SQ, UK
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I.F. McKee, Department of Biological and Chemical Sciences, John Tabor Laboratories, University of Essex, Wivenhoe Park, Colchester, Essex CO4 3SQ, UK.

ABSTRACT

This study investigated the interacting effects of carbon dioxide and ozone concentrations on the growth and yield of spring whet (Triticum aestivum L. cv. Wembley). Plants were exposed from time of sowing to harvest to reciprocal combinations of two carbon dioxide and two ozone treatments: [CO2] at 350 or 700 μmol mol−1, and [O3] at < 5 or 60 nmol mol−1. Records of leaf emergence, leaf duration and tillering were taken throughout leaf development. At harvest, biomass, yield and partitioning were analysed. Our data showed that elevated [CO2] fully protected against the detrimental effect of elevated [O3] on biomass, but not yield.

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