Cell Wall Amine Oxidases: New Players in Root Xylem Differentiation under Stress Conditions
AbstractPolyamines (PAs) are aliphatic polycations present in all living organisms. A growing body of evidence reveals their involvement as regulators in a variety of physiological and pathological events. They are oxidatively deaminated by amine oxidases (AOs), including copper amine oxidases (CuAOs) and flavin adenine dinucleotide (FAD)-dependent polyamine oxidases (PAOs). The biologically-active hydrogen peroxide (H2O2) is a shared compound in all of the AO-catalyzed reactions, and it has been reported to play important roles in PA-mediated developmental and stress-induced processes. In particular, the AO-driven H2O2 biosynthesis in the cell wall is well known to be involved in plant wound healing and pathogen attack responses by both triggering peroxidase-mediated wall-stiffening events and signaling modulation of defense gene expression. Extensive investigation by a variety of methodological approaches revealed high levels of expression of cell wall-localized AOs in root xylem tissues and vascular parenchyma of different plant species. Here, the recent progresses in understanding the role of cell wall-localized AOs as mediators of root xylem differentiation during development and/or under stress conditions are reviewed. A number of experimental pieces of evidence supports the involvement of apoplastic H2O2 derived from PA oxidation in xylem tissue maturation under stress-simulated conditions. View Full-Text
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Ghuge, S.A.; Tisi, A.; Carucci, A.; Rodrigues-Pousada, R.A.; Franchi, S.; Tavladoraki, P.; Angelini, R.; Cona, A. Cell Wall Amine Oxidases: New Players in Root Xylem Differentiation under Stress Conditions. Plants 2015, 4, 489-504.
Ghuge SA, Tisi A, Carucci A, Rodrigues-Pousada RA, Franchi S, Tavladoraki P, Angelini R, Cona A. Cell Wall Amine Oxidases: New Players in Root Xylem Differentiation under Stress Conditions. Plants. 2015; 4(3):489-504.Chicago/Turabian Style
Ghuge, Sandip A.; Tisi, Alessandra; Carucci, Andrea; Rodrigues-Pousada, Renato A.; Franchi, Stefano; Tavladoraki, Paraskevi; Angelini, Riccardo; Cona, Alessandra. 2015. "Cell Wall Amine Oxidases: New Players in Root Xylem Differentiation under Stress Conditions." Plants 4, no. 3: 489-504.