), ultrastructural (sites of NO synthesis, immunohistochemistry), and cell communication (co-culture of isolated symbionts, NO donors, c-PTIO) studies of NO, with the aim of clarifying the role of this multifaceted molecule. Acknowledgements This project was funded by the Spanish Ministry of Education and Science [project numbers
CGL2006-12917-C02-0 and CGL2009-13429-C02-01], project Prometeo 2008/174 of the Generalitat Valenciana and the project AECID PCI/A/024755/09 of the Spanish Ministry of Foreign Affaires. We are grateful to F. Gasulla, J. Gimeno-Romeu, E. Barreno, (ICBIBE, University of Valencia) and A. Guéra (Plant Biology, University of Alcalá) for communicating unpublished data, to Dr. R. Catalá (CIB, Madrid), Dr. P. D’Ocón (UVEG, Valencia) and Dr. J. Medina (INIA, Madrid) for critical revision of the manuscript, and J.L. Rodríguez Gil for MDA protocol optimization. English revision FHPI cost was done by Wendy Ran. References 1. Demmig-Adams B, Adams WW III: Harvesting sunlight safely. Nature 2000, 403:371–374.PubMedCrossRef 2. Kranner I, Beckett R, Hochman A, Nash TH: Desiccation-Tolerance in Lichens: A Review. The Bryologist 2008, 111:576–593.CrossRef 3. Kranner I:
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