目的:研究凤尾草的化学成分。方法:通过硅胶柱色谱、硅胶薄层制备以及凝胶柱色谱的方法分离纯化化合物,利用质谱、核磁共振等现代波谱技术解析化合物结构。结果:从凤尾草(Pteris multifidaPolir.)甲醇提取物中分离得到7种化合物:经波谱...目的:研究凤尾草的化学成分。方法:通过硅胶柱色谱、硅胶薄层制备以及凝胶柱色谱的方法分离纯化化合物,利用质谱、核磁共振等现代波谱技术解析化合物结构。结果:从凤尾草(Pteris multifidaPolir.)甲醇提取物中分离得到7种化合物:经波谱鉴定为1个倍半萜苷:pterosin C 3-O-β-D-glucoside(1)和6个黄酮类化合物:芹菜素(2)、木犀草素(3)、芹菜素-7-O-β-D-葡萄糖苷(4)、芹菜素-7-O-β-D-葡萄糖-4′-O-α-L-鼠李糖苷(5)、芹菜素-4′-O-α-L-鼠李糖苷(6)、木犀草素-7-O-β-D-葡萄糖苷(7)。结论:化合物(2)、(3)和(5)、(6)为首次从该植物中分离得到。展开更多
Doryopteris triphylla (Pteridaceae-Cheilanthoideae) grows in xeric habitats in Brazil, Paraguay, Uruguay and Argentina. The aim of this study was to characterize D. triphylla anatomically, histochemically and cytogene...Doryopteris triphylla (Pteridaceae-Cheilanthoideae) grows in xeric habitats in Brazil, Paraguay, Uruguay and Argentina. The aim of this study was to characterize D. triphylla anatomically, histochemically and cytogenetically. For anatomical characterization, rhizomes, roots, petioles and leaves were made and then stained using Safranine-Astra Blue for further observations. Leaf blades were also cleared. For histochemical analysis, leaf cross sections were stained with different reagents to identify glandular trichomes compounds. For cytogenetic characterization, a karyogram was performed using laboratory cultivated roots. Results show a dictyostelic rhizome covered with scales with apical secreting gland;diarch roots;petiole cross-sections show thick cuticle, uniseriate epidermis, parenchymatic cortex cells with thick walls and a vascular bundle with two xylem groups;and hypostomatic fronds with glandular trichomes. Histochemical studies of secretion products of the glandular trichomes were positive for polysaccharides, pectins, lipids, acid lipids, dihydroxyphenols, phenols and flavonoids. Cytogenetically, D. triphylla is described as a diploid species (2n = 60), with chromosomes gradually decreasing in size. The apical glands in scales of rhizomes, the presence of two xylem groups in the vascular bundle in the petiole and the glandular trichomes on the abaxial surface are new contributions to the species. The type of chemical products secreted by glandular leaf trichomes and karyotype estimation is shown for the first time in this species.展开更多
文摘目的:研究凤尾草的化学成分。方法:通过硅胶柱色谱、硅胶薄层制备以及凝胶柱色谱的方法分离纯化化合物,利用质谱、核磁共振等现代波谱技术解析化合物结构。结果:从凤尾草(Pteris multifidaPolir.)甲醇提取物中分离得到7种化合物:经波谱鉴定为1个倍半萜苷:pterosin C 3-O-β-D-glucoside(1)和6个黄酮类化合物:芹菜素(2)、木犀草素(3)、芹菜素-7-O-β-D-葡萄糖苷(4)、芹菜素-7-O-β-D-葡萄糖-4′-O-α-L-鼠李糖苷(5)、芹菜素-4′-O-α-L-鼠李糖苷(6)、木犀草素-7-O-β-D-葡萄糖苷(7)。结论:化合物(2)、(3)和(5)、(6)为首次从该植物中分离得到。
文摘Doryopteris triphylla (Pteridaceae-Cheilanthoideae) grows in xeric habitats in Brazil, Paraguay, Uruguay and Argentina. The aim of this study was to characterize D. triphylla anatomically, histochemically and cytogenetically. For anatomical characterization, rhizomes, roots, petioles and leaves were made and then stained using Safranine-Astra Blue for further observations. Leaf blades were also cleared. For histochemical analysis, leaf cross sections were stained with different reagents to identify glandular trichomes compounds. For cytogenetic characterization, a karyogram was performed using laboratory cultivated roots. Results show a dictyostelic rhizome covered with scales with apical secreting gland;diarch roots;petiole cross-sections show thick cuticle, uniseriate epidermis, parenchymatic cortex cells with thick walls and a vascular bundle with two xylem groups;and hypostomatic fronds with glandular trichomes. Histochemical studies of secretion products of the glandular trichomes were positive for polysaccharides, pectins, lipids, acid lipids, dihydroxyphenols, phenols and flavonoids. Cytogenetically, D. triphylla is described as a diploid species (2n = 60), with chromosomes gradually decreasing in size. The apical glands in scales of rhizomes, the presence of two xylem groups in the vascular bundle in the petiole and the glandular trichomes on the abaxial surface are new contributions to the species. The type of chemical products secreted by glandular leaf trichomes and karyotype estimation is shown for the first time in this species.
