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J Exp Bot

Title:		S-Nitrosoglutathione is a component of wound- and salicylic acid-induced systemic responses in Arabidopsis thaliana
Author(s):		Espunya MC; De Michele R; Gomez-Cadenas A; Martinez MC;
Address:		"Departament de Bioquimica i Biologia Molecular, Facultat de Biociencies, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain"
Journal Title:		J Exp Bot
Year:		2012
Volume:		20120227
Issue:		8
Page Number:		3219 - 3227
DOI:		10.1093/jxb/ers043
ISSN/ISBN:		1460-2431 (Electronic) 0022-0957 (Print) 0022-0957 (Linking)
Abstract:		"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"
Keywords:		"Arabidopsis/drug effects/genetics/*immunology/*metabolism Arabidopsis Proteins/metabolism Cyclopentanes/metabolism/pharmacology Disease Resistance/drug effects/immunology Gene Expression Regulation, Plant/drug effects Glutathione Reductase/metabolism Oxyl;"
Notes:		"MedlineEspunya, M Carme De Michele, Roberto Gomez-Cadenas, Aurelio Martinez, M Carmen eng Research Support, Non-U.S. Gov't England 2012/03/01 J Exp Bot. 2012 May; 63(8):3219-27. doi: 10.1093/jxb/ers043. Epub 2012 Feb 27"