1. Siberian Institute of Plant Physiology and Biochemistry of the Siberian Branch of the Russian Academy of Sciences, 132, Lermontov Str., Irkutsk 664033, Russia
2. Department of Plant Breeding, Swedish University of Agricultural Sciences, P.O. Box 190, SE 23422 Lomma, Sweden
3. Vinogradov Institute of Geochemistry of the Siberian Branch of the Russian Academy of Sciences, 1 A Favorsky Str., Irkutsk 664033, Russia
4. A.E. Favorsky Irkutsk Institute of Chemistry of the Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russia