Effects of high temperature stress on plasma membrane permeability and chloroplast structure of Huperzia serrata Advances in studies on chemical constituents of Huperzia serrata and their pharmacological effects Advances in studies on Huperzia serrata Conditional optimization and kinetic research on producing huperzine A using Huperzia serrata in vitro Effects of high temperature stress on physiological characteristics of Huperzia serrata Chemical constituents of Huperzia serrata Advances in study of hyperzine A Advances in studies on chemical constituents of Huperzia serrata and their pharmacological effects Chemical constituents of Huperzia serrata