Class III Peroxidases PRX01, PRX44, and PRX73 Control Root Hair Growth in Arabidopsis Thaliana

    May 2022 in “ International journal of molecular sciences ”
    Eliana Marzol, Cecilia Borassi, Mariana Carignani Sardoy, Philippe Ranocha, Ariel A. Aptekmann, Mauro Bringas, Janice Pennington, Julio Paéz-Valencia, Javier Martínez Pacheco, Diana Rosa Rodríguez-Garcia, Yossmayer del Carmen Rondón Guerrero, Juan Manuel Peralta, Margaret B. Fleming, John W. Mishler‐Elmore, Silvina Mangano, Francisca Blanco‐Herrera, Patricia A. Bedinger, Christophe Dunand, Luciana Capece, Alejandro D. Nadra, Michael Held, Marisa S. Otegui, José M. Estevez
    TLDR PRX01, PRX44, and PRX73 are essential for root hair growth in Arabidopsis thaliana.
    The study investigates the role of Class III peroxidases PRX01, PRX44, and PRX73 in controlling root hair growth in Arabidopsis thaliana. The researchers found that these peroxidases are crucial for root hair elongation by regulating reactive oxygen species (ROS) levels and cell wall properties. The prx01,44,73 triple mutant exhibited shorter root hairs and reduced peroxidase activity, while overexpression of PRX44 and PRX73 led to longer root hairs and increased peroxidase activity. The findings suggest that PRX01, PRX44, and PRX73 function as apoplastic regulators of ROS-linked root hair cell elongation, with PRX44 playing a particularly significant role in rescuing root hair defects in the triple mutant.
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