About the Authors

Fang Xu

Affiliations Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada, Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada

Paul Kapos

Affiliation Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada

Yu Ti Cheng

Affiliation Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada

Meng Li

Affiliation Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada

Yuelin Zhang

Affiliations Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada, National Institute of Biological Sciences, Beijing, People's Republic of China

Xin Li

xinli@msl.ubc.ca

Affiliations Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada, Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: FX YZ XL. Performed the experiments: FX PK ML YTC. Analyzed the data: FX PK ML YZ XL. Contributed reagents/materials/analysis tools: YZ XL. Wrote the paper: FX XL.