Apoplastic class III peroxidases PRX62 and PRX69 promote Arabidopsis root hair growth at low temperature.

ABSTRACT: Root Hairs (RHs) growth is influenced by endogenous and by external environmental signals that coordinately regulate its final cell size. We have recently determined that RH growth was unexpectedly boosted when Arabidopsis thaliana seedlings are cultivated at low temperatures. It was proposed that RH growth plasticity in response to low temperature was linked to a reduced nutrient availability in the media. Here, we explore the molecular basis of this RH growth response by using a Genome Wide Association Study (GWAS) approach using Arabidopsis thaliana natural accessions. We identify the poorly characterized PEROXIDASE 62 (PRX62) and a related protein PRX69 as key proteins under moderate low temperature stress. Strikingly, a cell wall protein extensin (EXT) reporter reveals the effect of p

SUBMITTER: Pacheco JM 

PROVIDER: S-EPMC8921275 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature