1. Inst. of Ecology and Biological Resources, Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Cau Giay, Ha Noi Vietnam
2. Inst. de Hortofruticultura Subtropical ‘La Mayora’, Consejo Superior de Investigaciones Científicas; Spain
3. Quang Tri Center of Science and Technology, Mientrung Inst. for Scientific Research; 121 Ly Thuong Kiet Dong Ha, Quang Tri Vietnam
4. Komarov Botanical Inst., Russian Academy of Sciences; Prof. Papov Srt 2 RU-197376 St Petersburg Russia