Singchia Z. J. Liu ＆ L. J. Chen, a new orchid genus, is established based on the new species S. malipoensis Z. J. Liu ＆ L. J. Chen found in southeast Yunnan, China. The new genus is related to Pteroceras, from which...Singchia Z. J. Liu ＆ L. J. Chen, a new orchid genus, is established based on the new species S. malipoensis Z. J. Liu ＆ L. J. Chen found in southeast Yunnan, China. The new genus is related to Pteroceras, from which it differs by having a lip with its basal margins immovably adnate to the lower part of the pendent column foot, a thin-walled spur, and very unequally and deeply split pollinia, each with a distinct caudicle. In addition to a discussion on Ascocentrum pusillum, a species of questionable placement, another new genus, namely Gunnaria S. C. Chen ex Z. J. Liu ＆ L. J. Chen, is set up and a new combination, namely G. pusilla （Aver.） Z. J. Liu ＆ L. J. Chen, is made. The new genus Gunnaria differs from its allyAscocentrum by having a cross-shaped pollinarium, sulcate or split pollinia, each with a distinct caudicle attached to a common linear stipe much longer than either pollinia or viscidium, and strongly incurved side lobes of the lip.展开更多
目的:采用PMP(1-苯基-3-甲基-5-吡唑啉酮)柱前衍生化-HPCE法测定多糖的单糖组成,探讨不同种源霍山石斛、铜皮石斛及野生河南石斛药效物质基础的相似性。方法:采用石英毛细管柱(100 cm×50μm),350mmol/L硼酸溶液(以1.0 mol/L Na OH...目的:采用PMP(1-苯基-3-甲基-5-吡唑啉酮)柱前衍生化-HPCE法测定多糖的单糖组成,探讨不同种源霍山石斛、铜皮石斛及野生河南石斛药效物质基础的相似性。方法:采用石英毛细管柱(100 cm×50μm),350mmol/L硼酸溶液(以1.0 mol/L Na OH溶液调至p H 10)为缓冲液,运行电压20 k V,柱温为25℃,检测波长250 nm,运行时间34 min。结果:5种石斛样品共检出木糖、葡萄糖、甘露糖、半乳糖、半乳糖醛酸和核糖6种单糖。相似度评价显示,同一种源石斛样品10个批次间的相似度均在0.98以上,但不同种源的霍山石斛、铜皮石斛及野生河南石斛单糖组成及含量明显不同。结论:多糖部位PMP柱前衍生化-HPCE法具有简单、快速、准确、重现性好等优点,为不同种源的霍山石斛、铜皮石斛与野生河南石斛的定性鉴别及药材内在质量评价提供新的参考依据。展开更多
石斛属(D end robium Sw.)为兰科植物,约有1 500种。我国有80种,其中药用石斛有51种。在我国传统医学中,石斛为常用药材,现代药理研究证明石斛具有抗肿瘤、抗衰老、降血糖等作用。霍山石斛是安徽省特产的药用石斛,为石斛中的上品。综述...石斛属(D end robium Sw.)为兰科植物,约有1 500种。我国有80种,其中药用石斛有51种。在我国传统医学中,石斛为常用药材,现代药理研究证明石斛具有抗肿瘤、抗衰老、降血糖等作用。霍山石斛是安徽省特产的药用石斛,为石斛中的上品。综述了霍山石斛的生理生化、生物学特性、有效成分等方面的研究现状。展开更多
基金supported financially by the National Program for Wild Life Conservation and Nature Reserve Construction,China,and by the Science & Technology Plan of Shenzhen,China (SYF 200646408).
文摘Singchia Z. J. Liu ＆ L. J. Chen, a new orchid genus, is established based on the new species S. malipoensis Z. J. Liu ＆ L. J. Chen found in southeast Yunnan, China. The new genus is related to Pteroceras, from which it differs by having a lip with its basal margins immovably adnate to the lower part of the pendent column foot, a thin-walled spur, and very unequally and deeply split pollinia, each with a distinct caudicle. In addition to a discussion on Ascocentrum pusillum, a species of questionable placement, another new genus, namely Gunnaria S. C. Chen ex Z. J. Liu ＆ L. J. Chen, is set up and a new combination, namely G. pusilla （Aver.） Z. J. Liu ＆ L. J. Chen, is made. The new genus Gunnaria differs from its allyAscocentrum by having a cross-shaped pollinarium, sulcate or split pollinia, each with a distinct caudicle attached to a common linear stipe much longer than either pollinia or viscidium, and strongly incurved side lobes of the lip.
文摘目的:采用PMP(1-苯基-3-甲基-5-吡唑啉酮)柱前衍生化-HPCE法测定多糖的单糖组成,探讨不同种源霍山石斛、铜皮石斛及野生河南石斛药效物质基础的相似性。方法:采用石英毛细管柱(100 cm×50μm),350mmol/L硼酸溶液(以1.0 mol/L Na OH溶液调至p H 10)为缓冲液,运行电压20 k V,柱温为25℃,检测波长250 nm,运行时间34 min。结果:5种石斛样品共检出木糖、葡萄糖、甘露糖、半乳糖、半乳糖醛酸和核糖6种单糖。相似度评价显示,同一种源石斛样品10个批次间的相似度均在0.98以上,但不同种源的霍山石斛、铜皮石斛及野生河南石斛单糖组成及含量明显不同。结论:多糖部位PMP柱前衍生化-HPCE法具有简单、快速、准确、重现性好等优点,为不同种源的霍山石斛、铜皮石斛与野生河南石斛的定性鉴别及药材内在质量评价提供新的参考依据。
文摘石斛属(D end robium Sw.)为兰科植物,约有1 500种。我国有80种,其中药用石斛有51种。在我国传统医学中,石斛为常用药材,现代药理研究证明石斛具有抗肿瘤、抗衰老、降血糖等作用。霍山石斛是安徽省特产的药用石斛,为石斛中的上品。综述了霍山石斛的生理生化、生物学特性、有效成分等方面的研究现状。
