Class III Peroxidases in Response to Multiple Abiotic Stresses in Arabidopsis thaliana Pyrenean Populations

Ali Eljebbawi (1) , Bruno Savelli (1) , Cyril Libourel (1) , José Manuel Estevez (2, 3, 4, 5) , Christophe Dunand (6)

1 LRSV - Laboratoire de Recherche en Sciences Végétales
2 Fundación Instituto Leloir [Buenos Aires]
3 Centro de Biotecnología Vegetal - CBV (Santiago, Chile)
4 IIBBA - Instituto de Investigaciones Bioquímicas [Buenos Aires]
5 iBio - Instituto Milenio de Biología Integrativa = Millennium Institute for Integrative Biology
6 Dynamique et Evolution des Parois cellulaires végétales

Class III peroxidases constitute a plant-specific multigene family, where 73 genes have been identified in Arabidopsis thaliana. These genes are members of the reactive oxygen species (ROS) regulatory network in the whole plant, but more importantly, at the root level. In response to abiotic stresses such as cold, heat, and salinity, their expression is significantly modified. To learn more about their transcriptional regulation, an integrative phenotypic, genomic, and transcriptomic study was executed on the roots of A. thaliana Pyrenean populations. Initially, the root phenotyping highlighted 3 Pyrenean populations to be tolerant to cold (Eaux), heat (Herr), and salt (Grip) stresses. Then, the RNA-seq analyses on these three populations, in addition to Col-0, displayed variations in CIII Prxs expression under stressful treatments and between different genotypes. Consequently, several CIII Prxs were particularly upregulated in the tolerant populations, suggesting novel and specific roles of these genes in plant tolerance against abiotic stresses.

Mots clés: class III peroxidases; abiotic stress; natural populations; root development; RNA-seq; ROS

Domaines: Biologie végétale

Ali Eljebbawi, Bruno Savelli, Cyril Libourel, José Manuel Estevez, Christophe Dunand. Class III Peroxidases in Response to Multiple Abiotic Stresses in Arabidopsis thaliana Pyrenean Populations. International Journal of Molecular Sciences, 2022, 23 (7), pp.3960. ⟨10.3390/ijms23073960⟩. ⟨hal-03652538⟩