1. Institut für Biologie und Umweltwissenschaften Carl von Ossietzky Univ. Oldenburg Germany
2. Department of Horticultural Science Univ. of Minnesota St Paul Minnesota USA
3. Fondazione Edmund Mach San Michele all'Adige TN Italy
4. Univ Angers, Institut Agro, INRAE, IRHS, SFR QuaSaV Angers France
5. School of Agriculture, Policy and Development University of Reading, Whiteknights Reading UK