About the Authors

Fenghui Qi

Contributed equally to this work with: Fenghui Qi, Tianzhong Jing

Affiliation School of Life Sciences, Northeast Forestry University, Harbin, China

Tianzhong Jing

Contributed equally to this work with: Fenghui Qi, Tianzhong Jing

Affiliation School of Forestry, Northeast Forestry University, Harbin, China

Yaguang Zhan

yaguangz@yahoo.com

Affiliation School of Life Sciences, Northeast Forestry University, Harbin, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YZ FQ TJ. Performed the experiments: FQ. Analyzed the data: TJ. Contributed reagents/materials/analysis tools: YZ FQ TJ. Wrote the paper: TJ.