S -Nitrosoglutathione is a component of wound- and salicylic acid-induced systemic responses in Arabidopsis thaliana
Espunya Prat, M. Carme (Universitat Autònoma de Barcelona. Departament de Bioquímica i de Biologia Molecular)
De Michele, Roberto (Universitat Autònoma de Barcelona. Departament de Bioquímica i de Biologia Molecular)
Gómez-Cadenas, Aurelio (Universitat Jaume I. Departament de Ciències Agràries i del Medi Natural)
Martínez, M. Carmen (María Carmen) (Universitat Autònoma de Barcelona. Departament de Bioquímica i de Biologia Molecular)

Fecha:	2012
Resumen:	S-Nitrosoglutathione (GSNO) is a bioactive, stable, and mobile reservoir of nitric oxide (NO), and an important player in defence responses to herbivory and pathogen attack in plants. It has been demonstrated previously that GSNO reductase (GSNOR) is the main enzyme responsible for the in vivo control of intracellular levels of GSNO. In this study, the role of S -nitrosothiols, in particular of GSNO, in systemic defence responses in Arabidopsis thaliana was investigated further. It was shown that GSNO levels increased rapidly and uniformly in injured Arabidopsis leaves, whereas in systemic leaves GSNO was first detected in vascular tissues and later spread over the parenchyma, suggesting that GSNO is involved in the transmission of the wound mobile signal through the vascular tissue. Moreover, GSNO accumulation was required to activate the jasmonic acid (JA)-dependent wound responses, whereas the alternative JA-independent wound-signalling pathway did not involve GSNO. Furthermore, extending previous work on the role of GSNOR in pathogenesis, it was shown that GSNO acts synergistically with salicylic acid in systemic acquired resistance activation. In conclusion, GSNOR appears to be a key regulator of systemic defence responses, in both wounding and pathogenesis.
Ayudas:	Ministerio de Ciencia e Innovación BFU2007-60569 Ministerio de Economía y Competitividad BFU2010-15090 Ministerio de Ciencia e Innovación CSD2007-00036 Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-0795
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Arabidopsis thaliana ; Jasmonic acid ; S-nitrosoglutathione reductase (GSNOR) ; S-nitrosothiols (SNOs) ; Systemic acquired resistance (SAR) ; Wounding
Publicado en:	Journal of experimental botany, Vol. 63, Issue 8 (May 2012) , p. 3219-3227, ISSN 1460-2431

DOI: 10.1093/jxb/ers043
PMID: 22371078

9 p, 899.3 KB

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