Dataset Information

Comparative analysis of PAD4 and SAG101 interactors upon activation of NLR immunity in Arabidopsis thaliana

ABSTRACT: Intracellular NLR receptors with a central nucleotide-binding domain allow plants to detect specific pathogen-secreted proteins and initiate immune signaling. A family of conserved Enhanced disease susceptibility 1 proteins with a lipase-like and the EP domain transduces the signal from activated NLRs downstream. This family includes EDS1, PAD4 and SAG101 that form mutually exclusive heterodimers EDS1-PAD4 and EDS1-SAG101. Despite sequence similarities, PAD4 and SAG101 control different aspects of NLR immune signaling. More specifically, PAD4 and SAG101 regulate resistance and cell death outputs of the NLR receptor pair RRS1-RPS4, respectively. Also, PAD4 and SAG101 genetically cooperate with distinct downstream signaling NLRs - ADR1 and NRG1. The main aim of this IP-LC/MS project is to assess whether PAD4 and SAG101 form complexes with ADR1 and NRG1 and to gain insight into mechanisms of the genetically established functional links between EDS1 family proteins and downstream signaling NLRs.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Arabidopsis Thaliana (mouse-ear Cress)

SUBMITTER: Sara Christina Stolze

LAB HEAD: Hirofumi Nakagami

PROVIDER: PXD021301 | Pride | 2021-04-06

REPOSITORIES: Pride

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Publications

Pathogen effector recognition-dependent association of NRG1 with EDS1 and SAG101 in TNL receptor immunity.

Sun Xinhua X Lapin Dmitry D Feehan Joanna M JM Stolze Sara C SC Kramer Katharina K Dongus Joram A JA Rzemieniewski Jakub J Blanvillain-Baufumé Servane S Harzen Anne A Bautor Jaqueline J Derbyshire Paul P Menke Frank L H FLH Finkemeier Iris I Nakagami Hirofumi H Jones Jonathan D G JDG Parker Jane E JE

Nature communications 20210607 1

Plants utilise intracellular nucleotide-binding, leucine-rich repeat (NLR) immune receptors to detect pathogen effectors and activate local and systemic defence. NRG1 and ADR1 "helper" NLRs (RNLs) cooperate with enhanced disease susceptibility 1 (EDS1), senescence-associated gene 101 (SAG101) and phytoalexin-deficient 4 (PAD4) lipase-like proteins to mediate signalling from TIR domain NLR receptors (TNLs). The mechanism of RNL/EDS1 family protein cooperation is not understood. Here, we present g ...[more]

PMID: 34099661

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Project description:There is growing evidence that for a comprehensive insight into the function of plant genes it is crucial to assess their functionalities under a wide range of conditions. In this study we examined the role of LESION SIMULATING DISEASE1 (LSD1), ENHANCED DISEASE SUSCEPTIBILITY1 (EDS1) and PHYTOALEXIN DEFICIENT4 (PAD4) in the regulation of photosynthesis, water use efficiency (WUE), ROS/hormonal homeostasis and seed yield in Arabidopsis thaliana grown in the laboratory and in the field. We demonstrate that the LSD1 null mutant (lsd1), which is known to exhibit a runaway cell death in non-permissive conditions, proves to be more tolerant to combined drought and high-light stress than the wild type. Moreover, depending on growing conditions, it shows variations in WUE, salicylic acid and hydrogen peroxide concentrations, photosystem II maximum efficiency and in transcription profiles. However, despite these changes, lsd1 demonstrates similar seed yield under all tested conditions. All of these traits depend on EDS1 and PAD4. The differences in the pathways prevailing in the lsd1 in various growing environments are manifested by the significantly smaller number of transcripts deregulated in the field compared to the laboratory, with only 43 commonly regulated genes. Our data indicate that LSD1, EDS1 and PAD4 participate in the regulation of various molecular and physiological processes that influence Arabidopsis fitness. On the basis of these results we emphasize that the function of such important regulators as LSD1, EDS1 and PAD4 should be studied not only under stable laboratory conditions, but also in the environment abounding in multiple stresses. Six genotypes x two conditions experiment including five-week-old WT (Ws), lsd1, pad4, eds1, eds1lsd1, and pad4lsd1 plants grown in laboratory or field conditions, hybridized in two loop-designs (lab and field). Two biological replicates. In total, 2 x 12 samples were hybridized on 24 Arabidopsis Gene Expression microarrays V4 (Agilent, two-color array) including color swap of replicate samples.

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