[1] CEA, DSV, Dept Ecophysiol Vegetale & Microbiol, Lab Radiobiol Vegetale, F-13108 St Paul Les Durance, France
[2] CEA, Dept Rech Fondamentale Mat Condensee, Unite Mixte Rech E3, CEA,UJF,DSM,Serv Chim Inorgan & Biol,Lab Les Acid, F-38054 Grenoble 9, France
[3] Fac Sci & Tech St Jerome, CNRS, UMR 6517, Case 432,Lab Bioinorgan Struct, F-13397 Marseille 20, France