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JXB Advance Access originally published online on January 22, 2008
Journal of Experimental Botany 2008 59(2):155-163; doi:10.1093/jxb/erm197
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© The Author [2008]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

FOCUS PAPER

Nitric oxide signalling in plants: interplays with Ca2+ and protein kinases

Cécile Courtois1 *, Angélique Besson1 *, Jennifer Dahan1, Stéphane Bourque1, Grazyna Dobrowolska2, Alain Pugin1 and David Wendehenne1,{dagger}

1Unité Mixte de Recherche INRA 1088/CNRS 5184/Université de Bourgogne, Plante-Microbe-Environnement, 17 rue Sully, BP 86510, F-21065 Dijon cedex, France
2Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland

{dagger} To whom correspondence should be addressed. E-mail: wendehen{at}dijon.inra.fr

Much attention has been paid to nitric oxide (NO) research since its discovery as a physiological mediator of plant defence responses. In recent years, newer roles have been attributed to NO, ranging from root development to stomatal closure. The molecular mechanisms underlying NO action in plants are just begun to emerge. The currently available data illustrate that NO can directly influence the activity of target proteins through nitrosylation and has the capacity to act as a Ca2+-mobilizing intracellular messenger. The interplay between NO and Ca2+ has important functional implications, expanding and enriching the possibilities for modulating transduction processes. Furthermore, protein kinases regulated through NO-dependent mechanisms are being discovered, offering fresh perspective on processes such as stress tolerance.

Key words: Ca2+, cADPR, nitric oxide, protein kinases, signalling, SnRK2

* Joint first author.

Received 14 June 2007; Revised 23 July 2007 Accepted 26 July 2007


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