Mechanisms of Transcriptional Regulation by Salicylic Acid Receptors.

Transcriptional activation of plant immunity by salicylic acid.

It is shown that SA stabilizes the SA-binding domain of NPR1 and allosterically promotes its interaction with MED15A, a subunit of the Mediator complex, which provides a mechanistic resolution to the longstanding question of how SA promotes transcriptional activation during plant immune responses.

Epigenetic mechanisms underlie anthocyanin homeostasis via R2R3-MYB-mediated transcriptional repression

It is reported that PpMYB308A, an R2R3-MYB repressor from peach, acts as an anthocyanin brake and an epigenetic mechanism behind the regulation of anthocyanin biosynthesis by R2R3-MYB repressors is uncovered.

Salicylic Acid Engages Central Metabolic Regulators SnRK1 and TOR to Govern Immunity by Differential Phosphorylation of NPR1

SUMMARY Immunity requires a delicate balance between combating infection and preserving metabolic functions. However, the mechanisms by which immune responses are coordinated with cellular metabolism remain largely unknown. Here, we show that NONEXPRESSER OF PR GENES 1 (NPR1), the central plant immune regulator of sali...

Molecular Mechanisms of Hormonal Regulation of Plant Immunity

The CPKs‐CBP60b positive feedback loop regulates immunity in Arabidopsis

It is demonstrated for the first time that CBP60b is post‐translationally regulated by CPKs via phosphorylation, while the pathogen‐induced expression of CPKs is dependent on CBP60b, which enables plants to mount a robust immune response against pathogens.

AtMPK1/AtMPK2 Interact with AtVQ25 to Enhance Its Protein Stability and Coordinately Regulate Salicylic Acid-Mediated Leaf Senescence

AtMPK1/AtMPK2 are established as upstream interactors of AtVQ25 that coordinate SA-mediated leaf senescence through phosphorylation-dependent enhancement of AtVQ25 protein stability, providing novel insights into the upstream regulatory circuitry of VQ proteins.