[en] The barley breeding programmes seek for varieties with better adaptation to climate change.
The aim of this study was to characterize the G132 mutant, selected in earlier studies on barley adaptation to high CO2 concentration environments, as compared to the Graphic wild type throughout development.
At early growth stages, photosynthesis measured with ambient and saturating atmospheric CO2 was lower in G132 than in Graphic, but recovered later in development. The results show that genotypic differences in photosynthesis were not due to limitations in CO2 diffusion into leaves caused by stomatal closure. It was concluded that the low photosynthesis rate in G132 was due to a decrease in content of ribulose-1,5-bisphosphate carboxylase–oxygenase (Rubisco), which catalyzes the CO2 fixation reaction. The low enzyme content was partly due to enhanced degradation.
Research Center/Unit :
Institute of Natural Resources and Agrobiology of Salamanca, CSIC, Cordel de Merinas, 40-52, 37008 Salamanca, Spain
Disciplines :
Biotechnology
Author, co-author :
Valeros, Fatima; Institute of Natural Resources and Agrobiology of Salamanca, CSIC > Abiotic Stress
Martinez-Carrasco, Rafael; Institute of Natural Resources and Agrobiology of Salamanca, CSIC > Abiotic Stress
Morcuende, Rosa; Institute of Natural Resources and Agrobiology of Salamanca, CSIC > Abiotic Stress
Córdoba Jacoste, Francisco Javier ; Université de Liège - ULiège > Département des sciences de la vie > Génétique et physiologie des microalgues
Perez, Pilar; Institute of Natural Resources and Agrobiology of Salamanca, CSIC > Abiotic Stress
Language :
English
Title :
Characterization of the G132 mutant barley with potential adaptation to climate change
