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Article Addendum

Wound healing in plants: Cooperation of copper amine oxidase and flavin-containing polyamine oxidase

Alessandra Tisi, Riccardo Angelini and Alessandra Cona

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Copper amine oxidases (CuAO) and flavin-containing amine oxidases (PAO) are hydrogen peroxide (H₂O₂)-producing enzymes responsible for the oxidative de-amination of polyamines. Currently, a key role has been ascribed to apoplastic amine oxidases in plants, i.e. to behave as H₂O₂-delivering systems in the cell wall during cell growth and differentiation as well as in the context of host-pathogen interactions. Indeed, H₂O₂ is the co-substrate for the peroxidase-driven reactions during cell-wall maturation and a key signalling molecule in defence mechanisms. We recently demonstrated the involvement of an apoplastic PAO in the wound-healing process of the Zea mays mesocotyl. Experimental evidence indicated a similar role for an apoplastic PAO in Nicotiana tabacum. In this addendum we suggest that a CuAO activity is also involved in this healing event.

Authors

Alessandra Tisi

Dipartimento di Biologia; Università %u201CRoma Tre;%u201D Rome, Italy

Riccardo Angelini

Dipartimento di Biologia; Università %u201CRoma Tre;%u201D Rome, Italy

Alessandra Cona

Dipartimento di Biologia; Università %u201CRoma Tre;%u201D Rome, Italy

Purchase article for $19

Subscribe to this journal for $79/year