title: Grain protein concentration and harvestable protein under future climate conditions. A study of 108 spring barley accessions.
abstract: 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.
authors.affiliation: Atmospheric Environment, DTU Environmental engineering, Technical University of Denmark, Building 115, DK - 2800 Kgs. Lyngby, Denmark cathrine.ingvordsen@csiro.au.
authors.forename: Cathrine H
authors.initials: CH
authors.lastname: Ingvordsen
authors.affiliation: Department of Agroecology, AU-Flakkebjerg, Aarhus University, Forsøgsvej 1, DK-4200 Slagelse, Denmark.
authors.forename: René
authors.initials: R
authors.lastname: Gislum
authors.affiliation: Department of Agroecology, AU-Flakkebjerg, Aarhus University, Forsøgsvej 1, DK-4200 Slagelse, Denmark.
authors.forename: Johannes R
authors.initials: JR
authors.lastname: Jørgensen
authors.affiliation: Atmospheric Environment, DTU Environmental engineering, Technical University of Denmark, Building 115, DK - 2800 Kgs. Lyngby, Denmark.
authors.forename: Teis N
authors.initials: TN
authors.lastname: Mikkelsen
authors.affiliation: Department of Applied Mathematics and Computer Science, Technical University of Denmark, Matematiktorvet, Bld. 324, 2800 Kgs. Lyngby, Denmark.
authors.forename: Anders
authors.initials: A
authors.lastname: Stockmarr
authors.affiliation: Atmospheric Environment, DTU Environmental engineering, Technical University of Denmark, Building 115, DK - 2800 Kgs. Lyngby, Denmark.
authors.forename: Rikke B
authors.initials: RB
authors.lastname: Jørgensen
mesh_terms: D001947:Breeding; D002245:Carbon Dioxide / Q000494:pharmacology; D057231:Climate Change; D060146:Ecotype; D001467:Hordeum / Q000187:drug effects / Q000378:metabolism*; D008954:Models, Biological; D010940:Plant Proteins / Q000378:metabolism*; D012621:Seasons; D012639:Seeds / Q000378:metabolism*; D019265:Spectroscopy, Near-Infrared
chemical_list: D010940:Plant Proteins; D002245:Carbon Dioxide
keywords: Climate change; elevated carbon dioxide; elevated temperature; grain protein harvested; near-infrared spectroscopy; two-factor treatment.