Unknown

Dataset Information

0

The Copper Amine Oxidase AtCuAOδ Participates in Abscisic Acid-Induced Stomatal Closure in Arabidopsis.


ABSTRACT: Plant copper amine oxidases (CuAOs) are involved in wound healing, defense against pathogens, methyl-jasmonate-induced protoxylem differentiation, and abscisic acid (ABA)-induced stomatal closure. In the present study, we investigated the role of the Arabidopsis thaliana CuAOδ (AtCuAOδ; At4g12290) in the ABA-mediated stomatal closure by genetic and pharmacological approaches. Obtained data show that AtCuAOδ is up-regulated by ABA and that two Atcuaoδ T-DNA insertional mutants are less responsive to this hormone, showing reduced ABA-mediated stomatal closure and H2O2 accumulation in guard cells as compared to the wild-type (WT) plants. Furthermore, CuAO inhibitors, as well as the hydrogen peroxide (H2O2) scavenger N,N1-dimethylthiourea, reversed most of the ABA-induced stomatal closure in WT plants. Consistently, AtCuAOδ over-expressing transgenic plants display a constitutively increased stomatal closure and increased H2O2 production compared to WT plants. Our data suggest that AtCuAOδ is involved in the H2O2 production related to ABA-induced stomatal closure.

SUBMITTER: Fraudentali I 

PROVIDER: S-EPMC6630932 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC8699484 | biostudies-literature
| S-EPMC3207813 | biostudies-literature
| S-EPMC6589527 | biostudies-literature
| S-EPMC3602010 | biostudies-literature
| S-EPMC312738 | biostudies-literature
| S-EPMC5181576 | biostudies-literature
| S-EPMC1914098 | biostudies-literature
| S-EPMC5700692 | biostudies-literature
| S-EPMC6771588 | biostudies-literature
| S-EPMC8227765 | biostudies-literature