1. State Key Laboratory of Plant Physiology and Biochemistry College of Agronomy and Biotechnology China Agricultural University Beijing 100193 China
2. Department of Plant Pathology and Microbiology Institute for Plant Genomics & Biotechnology Texas A&M University College Station TX 77843 USA
3. Department of Biochemistry and Biophysics Institute for Plant Genomics & Biotechnology Texas A&M University College Station TX 77843 USA
4. National Engineering Research Center for Vegetables Beijing Academy of Agriculture and Forestry Sciences Beijing 100097 China
5. College of Science China Agricultural University Beijing 100193 China
6. Texas A&M AgriLife Research and Extension Center 1102 East FM 1294 Lubbock TX 79403 USA