Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/ijms23073960
Keywords
class III peroxidases; abiotic stress; natural populations; root development; RNA-seq; ROS
Funding
- French Laboratory of Excellence project TULIP [ANR10-LABX-41, ANR-11-IDEX-0002-02]
- ANPCyT [PICT2017-0066, PICT2019-0015]
- ANID-Programa Iniciativa Cientifica Milenio [ICN17_022, NCN2021_010]
- Fondo Nacional de Desarrollo Cientifico y Tecnologico [1200010]
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Class III peroxidases play important roles in the reactive oxygen species (ROS) regulatory network in plants, particularly in response to cold, heat, and salt stresses. A study on Pyrenean populations revealed that certain CIII Prxs were significantly upregulated in tolerant populations, suggesting their specific roles in plant tolerance against abiotic stresses.
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.
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