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Journal of Experimental Botany, Vol. 57, No. 11, pp. 2795-2804, 2006

Karoliina Niemi
Department of Applied Biology
Univeristy of Helsinki
PO Box 27
00014 University of Helsinki, Finland

Suvi Sutela
Department of Biology
University of Oulu
PO Box 3000
90014 University of Oulu, Finland

Hely Haggman
Department of Biology
University of Oulu
PO Box 3000
90014 University of Oulu, Finland

Carolyn Scagel
USDA-ARS
Horticultural Crops Research Laboratory
Corvallis, OR 97330, USA

Jaana Vuosku
Department of Biology
University of Oulu
PO Box 3000
90014 University of Oulu, Finland

Anne Jokela
Department of Biology
University of Oulu
PO Box 3000
90014 University of Oulu, Finland

Tytti Sarjala
Finnish Forest Research Institute
Parkano Research Unit
39700 Parkano, Finland