Patellin1 Negatively Modulates Salt Tolerance by Regulating PM Na+/H+ Antiport Activity and Cellular Redox Homeostasis in Arabidopsis.

Soil salinity significantly represses plant development and growth. Mechanisms involved sodium (Na+) extrusion and compartmentation, intracellular membrane trafficking as well as redox homeostasis regulation play important roles in plant salt tolerance. In this study, we report that Patellin1 (PATL1), a membrane trafficking-related protein, modulates salt tolerance in Arabidopsis.

UBIQUITIN-SPECIFIC PROTEASES function in plant development and stress responses.

UBIQUITIN-SPECIFIC PROTEASES play important roles in plant development and stress responses. Protein ubiquitination and deubiquitination are reversible processes, which can modulate the stability, activity as well as subcellular localization of the substrate proteins. UBIQUITIN-SPECIFIC PROTEASE (UBP) protein family participates in protein deubiquitination.

Stability and localization of 14-3-3 proteins are involved in salt tolerance in Arabidopsis.

Salt stress induces the degradation of 14-3-3 proteins, and affects the localization of 14-3-3 λ. Both the modulation of 14-3-3 protein stability and the subcellular localization of these proteins are involved in salt tolerance in plants. Salt tolerance in plants is regulated by multiple signaling pathways, including the salt overly sensitive (SOS) pathway, of which the SOS2 protein is a key component.