1. Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
2. Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China
3. Department of Plant Biology, School of Integrative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
4. Max-Planck-Institute of Molecular Plant Physiology, Am Muhlenberg 1, Potsdam-Golm 14476, Germany
5. National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, P.R. China
6. School of Environmental & Life Sciences, The University of Newcastle, Callaghan NSW 2308, Australia