1. Washington State University; Department of Horticulture and Landscape Architecture; Pullman WA USA
2. University of Florida; Department of Agronomy; Gainesville FL USA
3. Ludwig-Maximilians-Universität; Department Biologie I, Bereich Botanik Zellbiologie und Zellkultur; Munich Germany
4. Oregon State University; Department of Horticulture; Corvallis OR USA
5. Universite Paris-Sud; Institut de Biotechnologie des Plantes (IBP); Orsay Cedex France
6. University of Florida; Horticultural Sciences Department and the Graduate Program in Plant Molecular and Cellular Biology; Gainesville FL USA