江西石松类孢子形态的研究

应用扫描电子显微镜对江西产２科５属８种（含变型）石松类植物的孢子形态进行了观察,结果表明,２科植物孢子形态相似,但外壁纹饰有差别,所观察的各属间、种间在孢子形态上亦有差异。     

Variation in huperzine A and B in Australasian Huperzia species

Huperzine A (HupA) and huperzine B (HupB) are alkaloids with acetylcholine esterase inhibitory activity and potential applications in the treatment of Alzheimer's disease. Both alkaloids were isolated in the 1980s from the Chinese lycopod Huperzia serrata (Thunb. ex Murray) Trevis., which has been used since the Tang dynasty as a traditional Chinese medicine. Most of the HupA currently used in herbal supplements and medicines worldwide is sourced from H. serrata which on average contains only 0.18 mg g⁻¹ dry wt HupA and is experiencing a rapid decline in China due to over-harvesting. Eleven Australasian Huperzia species were surveyed and nine species were found to contain both alkaloids, with a significant positive relationship observed between HupA and the lower abundance HupB. An Australian Huperzia carinata plant had one of the highest HupA concentrations recorded for a plant (1.03 mg g⁻¹ dry wt) and an Huperzia phlegmaria plant had the highest HupB value of all species surveyed (0.23 mg g⁻¹ dry wt). Intra-specific variation in huperzine concentration was examined for H. phlegmaria and Huperzia phlegmarioides and both HupA and HupB varied substantially within each species, but this variation was unrelated to foliar nitrogen levels.     

中国东北石松孢子形态的研究

本文利用扫描电子显微镜对中国东北产的２科３属８种（含变种）石松植物的孢子进行了观察,对每个种的形态特征进行了描述。讨论了各属、种间的差异,为石松植物的系统分类及粉学研究提供资料。