Huperzzia serrata(Thunb.)Trev,with its name of Qiancengta in China,is one of the traditional medicines.Many alkaloids were isolated from H.serrata,in which the main composition huperzine A(HupA)has been shown to treat Alzheimer's clinically.However,because of strict requirements on growing environment and long growth cycle(6-15 years),the natural resources of H.serrata is scarce.Many scientists are trying to relieve market demand on HupA in the way of chemical synthesis of HupA and tissue culture of H.serra...