1. Ministry of Education Key Laboratory for Biodiversity Science and Ecologic Engineering Institute of Biodiversity Science Fudan University Shanghai 200438China
2. Department of Plant Sciences Seed Biotechnology Center University of California Davis California 95616USA
3. State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing 100093China
4. Department of Ecology and Evolutionary Biology University of Arizona Tucson Arizona 85721USA