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- Title
Apoplastic class III peroxidases PRX62 and PRX69 promote Arabidopsis root hair growth at low temperature.
- Authors
Pacheco, Javier Martínez; Ranocha, Philippe; Kasulin, Luciana; Fusari, Corina M.; Servi, Lucas; Aptekmann, Ariel. A.; Gabarain, Victoria Berdion; Peralta, Juan Manuel; Borassi, Cecilia; Marzol, Eliana; Rodríguez-Garcia, Diana Rosa; del Carmen Rondón Guerrero, Yossmayer; Sardoy, Mariana Carignani; Ferrero, Lucía; Botto, Javier F.; Meneses, Claudio; Ariel, Federico; Nadra, Alejandro D.; Petrillo, Ezequiel; Dunand, Christophe
- 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 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. Arabidopsis root hair growth is enhanced at low temperatures. Here the authors show that the class III peroxidases PRX62 and PRX69 modulate ROS homeostasis and cell wall characteristics, and promote root hair elongation at low temperature.
- Subjects
HAIR growth; LOW temperatures; GENOME-wide association studies; PEROXIDASE; ARABIDOPSIS
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-28833-4