The Class III Peroxidase Encoding Gene AtPrx62 Positively and Spatiotemporally Regulates the Low pH-Induced Cell Death in Arabidopsisthaliana Roots.

ABSTRACT: Exogenous low pH stress causes cell death in root cells, limiting root development, and agricultural production. Different lines of evidence suggested a relationship with cell wall (CW) remodeling players. We investigated whether class III peroxidase (CIII Prx) total activity, CIII Prx candidate gene expression, and reactive oxygen species (ROS) could modify CW structure during low pH-induced cell death in Arabidopsis thaliana roots. Wild-type roots displayed a good spatio-temporal correlation between the low pH-induced cell death and total CIII Prx activity in the early elongation (EZs), transition (TZs), and meristematic (MZs) zones. In situ mRNA hybridization showed that AtPrx62 transcripts accumulated only in roots treated at pH 4.6 in the same zones where cell death was induced. Furth

SUBMITTER: Gracas JP 

PROVIDER: S-EPMC7582640 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature