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

Cathrine Heinz Ingvordsen, René Gislum, Johannes Ravn Jørgensen, Teis Nørgaard Mikkelsen, Anders Stockmarr, Rikke Bagger Jørgensen

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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.
Original languageEnglish
JournalJournal of Experimental Botany
Issue number8
Pages (from-to)2151-2158
Number of pages8
Publication statusPublished - 2016


  • Climate change
  • Elevated carbon dioxide
  • Elevated temperature
  • Grain protein harvested
  • Near-infrared spectroscopy
  • Two-factor treatment

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