Apoplastic class III peroxidases PRX62 and PRX69 promote Arabidopsis root hair growth at low temperature
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Fecha
2022-03
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
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Título del volumen
Editor
Nature Research
Nombre de Curso
Licencia CC
Attribution 4.0 International (CC BY 4.0)
Licencia CC
https://www.nature.com/ncomms/open-access
Resumen
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 peroxidase activity on EXT cell wall association at 10 °C in the RH apical zone. Collectively, our results indicate that PRX62, and to a lesser extent PRX69, are key apoplastic PRXs that modulate ROS-homeostasis and cell wall EXT-insolubilization linked to RH elongation at low temperature.
Notas
Indexación: Scopus.
Palabras clave
cell, enzyme activity, hair, herb, low temperature, molecular analysis, protein, seeding, Arabinogalactan Proteins, Extensin, Arabidopsis
Citación
Nature Communications, Volume 13, Issue 1, December 2022, Article number 1310.
DOI
10.1038/s41467-022-28833-4