Photorespiration differs among Arabidopsis thaliana ecotypes and is correlated with photosynthesis.

ABSTRACT: A greater understanding of natural variation in photosynthesis will inform strategies for crop improvement by revealing overlooked opportunities. We use Arabidopsis thaliana ecotypes as a model system to assess (i) how photosynthesis and photorespiration covary and (ii) how mesophyll conductance influences water use efficiency (WUE). Phenotypic variation in photorespiratory CO2 efflux was correlated with assimilation rates and two metrics of photosynthetic capacity (i.e. VCmax and Jmax); however, genetic correlations were not detected between photosynthesis and photorespiration. We found standing genetic variation-as broad-sense heritability-for most photosynthetic traits, including photorespiration. Genetic correlation between photosynthetic electron transport and carboxylation capacities

SUBMITTER: Tomeo NJ 

PROVIDER: S-EPMC6184796 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature