About the Authors

Jing Xu

Affiliation State Key Laboratory of Grassland and Agroecosystems, School of Life Science, Lanzhou University, Lanzhou, P.R. China

Wenlong Li

Affiliation State Key Laboratory of Grassland and Agroecosystems, School of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, P.R. China

Chunhui Zhang

Affiliation State Key Laboratory of Grassland and Agroecosystems, School of Life Science, Lanzhou University, Lanzhou, P.R. China

Wei Liu

Affiliation State Key Laboratory of Grassland and Agroecosystems, School of Life Science, Lanzhou University, Lanzhou, P.R. China

Guozhen Du

guozhendu2013@gmail.com

Affiliation State Key Laboratory of Grassland and Agroecosystems, School of Life Science, Lanzhou University, Lanzhou, P.R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JX GD. Performed the experiments: JX WL GD. Analyzed the data: JX CZ. Contributed reagents/materials/analysis tools: JX CZ WL. Wrote the paper: JX WL CZ.