The Pea Inner Nuclear Membrane SUN Domain Protein Modulates Plant (a)biotic Stress Responses by Regulating Nuclear Dynamics.

ABSTRACT: Plant inner nuclear membrane (INM) Sad1/UNC-84 (SUN) proteins are essential for maintaining nuclear morphology, positioning and gene expression during development and environmental stress conditions. Recent studies suggest their involvement in symbiosis and pathogen defence, but their precise role in plant immunity remains unclear. Given the importance of nuclear dynamics during plant-pathogen interactions, understanding the function of SUN proteins in immune signalling is essential. Here, we identify and characterise the pea (Pisum sativum) C-terminal SUN. Using knockdown (KD) and overexpression (OE) strategies in pea and/or Arabidopsis, we demonstrate that PsSUN localises to the INM and regulates pathogen-induced nuclear positioning, nuclear morphology and defence gene expression. PsSUN-

SUBMITTER: Sharma A 

PROVIDER: S-EPMC12528000 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature