Scientific Reports 5: Article number: 15184; published online 16 October 2015; updated: 27 January 2016

There is an error in the Acknowledgments section of this Article.

“This project was supported by the National Research Initiative Competitive Grant (No. USDA-NRI/NIFA 2010-65205-20588) from the USDA National Institute of Food and Agriculture and by the China National Science Foundations International Program Competitive Grant (No. 21023130).”

should read:

“This project was supported by the National Research Initiative Competitive Grant (No. USDA-NRI/NIFA 2010-65205-20588) from the USDA National Institute of Food and Agriculture and by the National Natural Science Foundation of China (No. 31320103905).”