About the Authors
Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, PR China
National Agricultural Research Center, Tsukuba, Ibaraki, Japan
The authors have declared that no competing interests exist.
Conceived and designed the experiments: TW QC HC. Performed the experiments: QC HC QM QL TS TU. Analyzed the data: TW TO QC. Contributed reagents/materials/analysis tools: QC HC QM QL TS TU ZW LX. Wrote the paper: TW TO.