1. Key Laboratory of Crop Ecophysiology and Farming System in Southwest China; Institute of Ecological Agriculture; Sichuan Agricultural University; Chengdu 611130 China
2. State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; Beijing 100101 China
3. University of Chinese Academy of Sciences; Beijing 100049 China
4. Department of Biology and Biotechnology ‘Charles Darwin’; Sapienza University; Rome 00185 Italy