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

Ingvordsen, Cathrine Heinz; Gislum, René; Jørgensen, J.R.; Mikkelsen, Teis N and Jørgensen, R.B. (2016) Grain protein concentration and harvestable protein under future climate conditions. A study of 108 spring barley accessions. Journal of Experimental Botany, 67, pp. 2151-2158.

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Online at: http://jxb.oxfordjournals.org.proxy.findit.dtu.dk/content/67/8/2151.full.pdf+html

Summary

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.


EPrint Type:Journal paper
Subjects: Environmental aspects > Air and water emissions
Crop husbandry > Crop health, quality, protection
Research affiliation: European Union > CORE Organic II > COBRA
Denmark > DTU - Technical University of Denmark
DOI:10.1093/jxb/erw033
Deposited By: Jørgensen, Dr. Rikke Bagger
ID Code:30318
Deposited On:18 Aug 2016 08:35
Last Modified:18 Aug 2016 08:35
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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