国家"973项目"2011CBl11680;国家自然科学基金31070006;高校博士学科点专项科研基金20124306110006;湖南省高校科技成果产业化培育项目基金10CY013Supported by the Key Project of China National Programs for Fundamental Research and Development2011 CB111680;by the National Natural Science Foundation of China31070006;by the Research Fund for the Doctoral Program of Higher Education20124306110006;by the Science and Technology Achievements Breeding Program of Hunan Province University10CY013