The class III peroxidase PRX17 is a direct target of the MADS-box transcription factor AGAMOUS-LIKE15 (AGL15) and participates in lignified tissue formation

Claudia Cosio (1) , Philippe Ranocha (2) , Edith Francoz (3) , Vincent Burlat (2) , Yumei Zheng (4) , Sharyn Perry (4) , Juan-Jose Ripoll (1) , Martin Yanofsky (1) , Christophe Dunand (2)

1 UC San Diego - School of Biological Sciences [Univ California San Diego]
2 Dynamique et Evolution des Parois cellulaires végétales
3 LRSV - Laboratoire de Recherche en Sciences Végétales
4 UK - University of Kentucky

Several physiological functions have been attributed to class III peroxidases (PRXs) in plants, but the in planta role of most members of this family still remains undetermined. Here, we report the first functional characterization of PRX17 (At2g22420), one of the 73 members of this family in Arabidopsis thaliana. Localization of PRX17 was examined by transient expression in Nicotiana benthamiana. Loss- and gain-of-function mutants in A. thaliana were studied. Regulation at the gene and protein levels was analyzed using β-glucuronidase (GUS) activity, quantitative reverse transcriptase (qRT)-PCR, zymography, and chromatin immunoprecipitation. Phenotypes were characterized including lignin and xylan contents.

Mots clés: Arabidopsisthaliana; chromatin immunoprecipitation-withDNAmicroarray (ChIP-chip); development; flower; isoelectric focusing (IEF); peroxidase; silique; stem.

Domaines: Ecotoxicologie

Claudia Cosio, Philippe Ranocha, Edith Francoz, Vincent Burlat, Yumei Zheng, et al.. The class III peroxidase PRX17 is a direct target of the MADS-box transcription factor AGAMOUS-LIKE15 (AGL15) and participates in lignified tissue formation. New Phytologist, 2017, 213 (1), pp.250-263. ⟨10.1111/nph.14127⟩. ⟨hal-01997900⟩