Distinct role of AtCuAOβ- and RBOHD-driven H₂O₂ production in wound-induced local and systemic leaf-to-leaf and root-to-leaf stomatal closure.

ABSTRACT: Polyamines (PAs) are ubiquitous low-molecular-weight aliphatic compounds present in all living organisms and essential for cell growth and differentiation. The developmentally regulated and stress-induced copper amine oxidases (CuAOs) oxidize PAs to aminoaldehydes producing hydrogen peroxide (H₂O₂) and ammonia. The Arabidopsis thaliana CuAOβ (AtCuAOβ) was previously reported to be involved in stomatal closure and early root protoxylem differentiation induced by the wound-signal MeJA via apoplastic H₂O₂ production, suggesting a role of this enzyme in water balance, by modulating xylem-dependent water supply and stomata-dependent water loss under stress conditions. Furthermore, AtCuAOβ has been shown to mediate early differentiation o

SUBMITTER: Fraudentali I 

PROVIDER: S-EPMC10160378 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature