1. State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences; Northwest A&F University; Yangling Shaanxi 712100 China
2. State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection; Northwest A&F University; Yangling Shaanxi 712100 China
3. Fachgebiet Phytopathologie; Fakultt Agrarwissenschaften; Institut für Phytomedizin; Universitt Hohenheim; Stuttgart 70593 Germany