LSU network hubs integrate abiotic and biotic stress responses via interaction with the superoxide dismutase FSD2.

ABSTRACT: In natural environments, plants often experience different stresses simultaneously, and adverse abiotic conditions can weaken the plant immune system. Interactome mapping revealed that the LOW SULPHUR UPREGULATED (LSU) proteins are hubs in an Arabidopsis protein interaction network that are targeted by virulence effectors from evolutionarily diverse pathogens. Here we show that LSU proteins are up-regulated in several abiotic and biotic stress conditions, such as nutrient depletion or salt stress, by both transcriptional and post-translational mechanisms. Interference with LSU expression prevents chloroplastic reactive oxygen species (ROS) production and proper stomatal closure during sulphur stress. We demonstrate that LSU1 interacts with the chloroplastic superoxide dismutase FSD2 and st

SUBMITTER: Garcia-Molina A 

PROVIDER: S-EPMC5441861 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature