Funding
This work was financially supported by
the
Heilongjiang Province Science Foundation for Youths
(Grant
No. QC2016018), the National Natural Science Foundation of China (Grant
No. 31600508), the Application Technology Research and Development
Projects of Heilongjiang Province (Grant No. WB13B104) and the Science
and Technology Project of Heilong jiang Farms & Land Reclamation
Administration (Grant No. HNK135-01-056). The authors also declare no
conflict of interest. The content of this article is the exclusive
responsibility of the authors.