About the Authors

Fenghui Qi, Yaguang Zhan
School of Life Sciences, Northeast Forestry University, Harbin, China

Tianzhong Jing
School of Forestry, Northeast Forestry University, Harbin, China

Corresponding Author

yaguangz@yahoo.com

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.