1. USDA-ARS; Appalachian Fruit Research Station; Kearneysville WV USA
2. State Key Laboratory of Crop Stress Biology in Arid Areas; College of Horticulture, Northwest A&F University; Yangling Shaanxi China
3. College of Life Sciences; Shaanxi Normal University; Xi'an Shaanxi China
4. Department of Agricultural; Food and Nutritional Science; University of Alberta; Edmonton AB Canada
5. Department of Cell Biology and Molecular Genetics; University of Maryland; College Park MD USA
6. College of Forestry; Henan University of Science and Technology; Luoyang Henan China
7. The Institute of Forestry and Pomology; Beijing Academy of Agriculture and Forestry Sciences; Beijing China