Front Plant Sci. 2016 Jul 25;7:1063. doi: 10.3389/fpls.2016.01063. eCollection 2016.
Water Deficit Affects Primary Metabolism Differently in Two Lolium multiflorum/Festuca arundinacea Introgression Forms with a Distinct Capacity for Photosynthesis and Membrane Regeneration.
Frontiers in plant science
Dawid Perlikowski, Mariusz Czyżniejewski, Łukasz Marczak, Adam Augustyniak, Arkadiusz Kosmala
Affiliations
Affiliations
- Institute of Plant Genetics, Polish Academy of Science Pozna?, Poland.
- Institute of Bioorganic Chemistry, Polish Academy of Sciences Pozna?, Poland.
PMID: 27504113
PMCID: PMC4958636 DOI: 10.3389/fpls.2016.01063
Abstract
Understanding how plants respond to drought at different levels of cell metabolism is an important aspect of research on the mechanisms involved in stress tolerance. Furthermore, a dissection of drought tolerance into its crucial components by the use of plant introgression forms facilitates to analyze this trait more deeply. The important components of plant drought tolerance are the capacity for photosynthesis under drought conditions, and the ability of cellular membrane regeneration after stress cessation. Two closely related introgression forms of Lolium multiflorum/Festuca arundinacea, differing in the level of photosynthetic capacity during stress, and in the ability to regenerate their cellular membranes after stress cessation, were used as forage grass models in a primary metabolome profiling and in an evaluation of chloroplast 1,6-bisphosphate aldolase accumulation level and activity, during 11 days of water deficit, followed by 10 days of rehydration. It was revealed here that the introgression form, characterized by the ability to regenerate membranes after rehydration, contained higher amounts of proline, melibiose, galactaric acid, myo-inositol and myo-inositol-1-phosphate involved in osmoprotection and stress signaling under drought. Moreover, during the rehydration period, this form also maintained elevated accumulation levels of most the primary metabolites, analyzed here. The other introgression form, characterized by the higher capacity for photosynthesis, revealed a higher accumulation level and activity of chloroplast aldolase under drought conditions, and higher accumulation levels of most photosynthetic products during control and drought periods. The potential impact of the observed metabolic alterations on cellular membrane recovery after stress cessation, and on a photosynthetic capacity under drought conditions in grasses, are discussed.
Keywords: chloroplast aldolase; drought; forage grasses; membrane regeneration; photosynthetic activity; primary metabolites
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