1 Guangxi University for Nationalities, School of Marine Sciences and Biotechnology, Guangxi Key Laboratory of Polysaccharide Materials and Their Modification, Nanning 530007, China.
2 Guangxi Botanical Garden of Medicinal Plants, Nanning 530023, China.
3 Guangxi University for Nationalities, School of Marine Sciences and Biotechnology, Guangxi Key Laboratory of Polysaccharide Materials and Their Modification, Nanning 530007, China. Electronic address: liuhongquan@gxun.edu.cn.