Grassland species differentially regulate proline concentrations under future climate conditions: an integrated biochemical and modelling approach.

ABSTRACT: Proline (Pro) is a versatile metabolite playing a role in the protection of plants against environmental stresses. To gain a deeper understanding of the regulation of Pro metabolism under predicted future climate conditions, including drought stress, elevated temperature and CO2 , we combined measurements in contrasting grassland species (two grasses and two legumes) at multiple organisational levels, that is, metabolite concentrations, enzyme activities and gene expression. Drought stress (D) activates Pro biosynthesis and represses its catabolism, and elevated temperature (DT) further elevated its content. Elevated CO2 attenuated the DT effect on Pro accumulation. Computational pathway control analysis allowed a mechanistic understanding of the regulatory changes in Pro metabolism. This

SUBMITTER: AbdElgawad H 

PROVIDER: S-EPMC4744684 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature