Grain protein concentration and harvestable protein under future climate conditions. A study of 108 spring barley accessions

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  • Cathrine Heinz Ingvordsen, Danmarks Tekniske Universitet
  • ,
  • René Gislum
  • Johannes Ravn Jørgensen
  • Teis Nørgaard Mikkelsen, Danmarks Tekniske Universitet
  • ,
  • Anders Stockmarr, Department of Applied Mathematics and Computer Science, Technical University of Denmark, 2800 Lyngby, Denmark, Danmark
  • Rikke Bagger Jørgensen, Danmarks Tekniske Universitet
In the present study a set of 108 spring barley (H. vulgare L.) accessions were cultivated under predicted future levels of temperature and [CO2] as single factors and in combination (IPCC, AR5, RCP8.5). Across all genotypes, elevated [CO2] (700 ppm day/night) slightly decreased protein concentration by 5%, while elevated temperature (+5 °C day/night) substantially increased protein concentration by 29%. The combined treatment increased protein concentration across accessions by 8%. This was an increase less than predicted from strictly additive effects of the individual treatments. Despite the increase in grain protein concentration, the decrease in grain yield at combined elevated temperature and elevated [CO2] resulted in 23% less harvestable protein. There was variation in the response of the 108 accessions, which might be exploited to at least maintain if not increase harvestable grain protein under future climate change conditions.
TidsskriftJournal of Experimental Botany
Sider (fra-til)2151-2158
Antal sider8
StatusUdgivet - mar. 2016

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