国家自然科学基金31460409;广西科学研究与技术开发计划项目重大专项桂科重14122003-5;广西植物研究所基本业务费项目桂植业 12003;广西矿冶与环境科学实验中心资助项目 KH2013YB013 [ Supported by the National Natural Science Foundation of China31460409;Major Program of Science and Technology of Guangxi14122003-5;Fundamental Research Funds of Guangxi Institute of Botany12003;Funds of Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment KH2013YB013 ]