About the Authors

Wenjie Wang

Affiliation The Key Laboratory of Forest Plant Ecology Ministry of Education, Harbin, Heilongjiang Province, P.R. China

Yanhong Li

Affiliation The Key Laboratory of Forest Plant Ecology Ministry of Education, Harbin, Heilongjiang Province, P.R. China

Huimei Wang

whm0709@hotmail.com

Affiliation The Key Laboratory of Forest Plant Ecology Ministry of Education, Harbin, Heilongjiang Province, P.R. China

Yuangang Zu

Affiliation The Key Laboratory of Forest Plant Ecology Ministry of Education, Harbin, Heilongjiang Province, P.R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WW YL HW YZ. Performed the experiments: WW YL. Analyzed the data: WW YL. Contributed reagents/materials/analysis tools: WW YL HW YZ. Wrote the paper: WW YL HW.