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

Javier Martínez Pacheco, Philippe Ranocha, Luciana Kasulin, Corina M. Fusari, Lucas Servi, Ariel. A. Aptekmann, Victoria Berdion Gabarain, Juan Manuel Peralta, Cecilia Borassi, Eliana Marzol, Diana Rosa Rodríguez-Garcia, Yossmayer Carmen Rondón Guerrero, Mariana Carignani Sardoy, Lucía Ferrero, Javier F. Botto, Claudio Meneses, Federico Ariel, Alejandro D. Nadra, Ezequiel Petrillo, Christophe Dunand and José M. Estevez ()
Additional contact information
Javier Martínez Pacheco: Fundación Instituto Leloir and IIBBA-CONICET
Philippe Ranocha: Université de Toulouse, UPS, UMR 5546, Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Toulouse INP
Luciana Kasulin: Fundación Instituto Leloir and IIBBA-CONICET
Corina M. Fusari: Universidad Nacional de Rosario, 2000, Rosario
Lucas Servi: Universidad de Buenos Aires, Ciudad Universitaria
Ariel. A. Aptekmann: Universidad de Buenos Aires, Ciudad Universitaria
Victoria Berdion Gabarain: Fundación Instituto Leloir and IIBBA-CONICET
Juan Manuel Peralta: Fundación Instituto Leloir and IIBBA-CONICET
Cecilia Borassi: Fundación Instituto Leloir and IIBBA-CONICET
Eliana Marzol: Fundación Instituto Leloir and IIBBA-CONICET
Diana Rosa Rodríguez-Garcia: Fundación Instituto Leloir and IIBBA-CONICET
Yossmayer Carmen Rondón Guerrero: Fundación Instituto Leloir and IIBBA-CONICET
Mariana Carignani Sardoy: Fundación Instituto Leloir and IIBBA-CONICET
Lucía Ferrero: Universidad Nacional del Litoral, CONICET, FBCB, Centro Científico Tecnológico CONICET Santa Fe, Colectora Ruta Nacional No 168km. 0, Paraje El Pozo
Javier F. Botto: Universidad de Buenos Aires, C1417DSE Ciudad Autónoma de Buenos Aires
Claudio Meneses: Universidad Andres Bello
Federico Ariel: Universidad Nacional del Litoral, CONICET, FBCB, Centro Científico Tecnológico CONICET Santa Fe, Colectora Ruta Nacional No 168km. 0, Paraje El Pozo
Alejandro D. Nadra: Universidad de Buenos Aires, Ciudad Universitaria
Ezequiel Petrillo: Universidad de Buenos Aires, Ciudad Universitaria
Christophe Dunand: Université de Toulouse, UPS, UMR 5546, Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Toulouse INP
José M. Estevez: Fundación Instituto Leloir and IIBBA-CONICET

Nature Communications, 2022, vol. 13, issue 1, 1-14

Abstract: 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.

Date: 2022
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DOI: 10.1038/s41467-022-28833-4

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