State Key Laboratory of Grassland Agro-Ecosystems;
School of Life Sciences;
Lanzhou University;
College of Forestry Science;
Gansu Agricultural University;
Key Laboratory of Adaptation and Evolution of Plateau Biota;
Northwest Institute of Plateau Biology;
Chinese Academy of Sciences;
State Key Laboratory of Cryospheric Sciences;
Cold and Arid Regions Environmental and Engineering Research Institute;
Chinese Academy of Sciences;
Acclimation; Photosynthesis; Drought; High; temperature; Picea; crassifolia; Picea; wilsonii;