ROS-derived lipid peroxidation is prevented in barley leaves during senescence.

ABSTRACT: Senescence in plants enables resource recycling from senescent leaves to sink organs. Under stress, increased production of reactive oxygen species (ROS) and associated signalling activates senescence. However, senescence is not always associated with stress since it has a prominent role in plant development, in which the role of ROS signalling is less clear. To address this, we investigated lipid metabolism and patterns of lipid peroxidation related to signalling during sequential senescence in first-emerging barley leaves grown under natural light conditions. Leaf fatty acid compositions were dominated by linolenic acid (75 % of total), the major poly-unsaturated fatty acid (PUFA) in galactolipids of thylakoid membranes, known to be highly sensitive to peroxidation. Lipid catabolism duri

SUBMITTER: Shimakawa G 

PROVIDER: S-EPMC9544269 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature