Funding for this research was provided by:
Anhui Province Nature Science Foundation (1408085MKL76)
Key projects of Anhui Province science and technology plan (15czz02074)
National Natural Science Foundation of China (>61672201)
Article History
Received: 14 July 2016
Revised: 26 November 2016
Accepted: 21 December 2016
First Online: 3 January 2017