Introduction The tuber of Ophiopogon japonicus ( L. f) Ker- Gawl, which is a Chinese traditional medicine named "maidong" have been recorded to have various medical functions for curing cardiovascular diseases an...Introduction The tuber of Ophiopogon japonicus ( L. f) Ker- Gawl, which is a Chinese traditional medicine named "maidong" have been recorded to have various medical functions for curing cardiovascular diseases and bacterial infections, especially heart diseases. Phytochemical studies on this plant were reported previously. In search of new and bioactive components from Chinese traditional medicines, the tubers of Ophiopogon japonicus have been investigated in this study. The present paper article covers the isolation and structure elucidation of a new furospirostanol saponin, namely, Ophiofurospiside B (compound 1 ) and two known steroidal saponins ( compounds 2 and 3).展开更多
Two new steroidal glucosides, 26-O-β-D-glucopyranosyl (25S)-furost-5-ene-1β,3β,22α,26-tetraol l-O-β-D-xylopyranosyl- (1 → 3)-[α-h-rhamnopyranosyl-(1 → 2)]-[β-D-fueopyranoside and (25R) spirost-5-ene-3...Two new steroidal glucosides, 26-O-β-D-glucopyranosyl (25S)-furost-5-ene-1β,3β,22α,26-tetraol l-O-β-D-xylopyranosyl- (1 → 3)-[α-h-rhamnopyranosyl-(1 → 2)]-[β-D-fueopyranoside and (25R) spirost-5-ene-3β,14α-diol-3-β-O-β-L-rhanmopyranosyl- (1 → 2)-[β-D-xylopyranosyl(1 → 4)]-[-β-D-glucopyranoside, were isolated from the Ophiopogon japonicus (L.f.) Ker-Gaw. Their structures were elucidated by spectroscopic methods.展开更多
用光镜和扫描电镜观察了麦冬〔Ophiopogon japonicus(L.f.)Ker-Gawl.〕、土麦冬(Liriope spicataLour.)和阔叶土麦冬(L.platyphyllaWang et Tang)叶表皮显微结构、亚显微结构和角质层内表面的形态结构。结果表明,气孔主要分布于麦冬、...用光镜和扫描电镜观察了麦冬〔Ophiopogon japonicus(L.f.)Ker-Gawl.〕、土麦冬(Liriope spicataLour.)和阔叶土麦冬(L.platyphyllaWang et Tang)叶表皮显微结构、亚显微结构和角质层内表面的形态结构。结果表明,气孔主要分布于麦冬、土麦冬和阔叶土麦冬叶片的下表皮,气孔密度分别为76.4、114.3和99.8个.mm-2;仅阔叶土麦冬叶片上表皮有少量气孔分布。3种植物的气孔器均不具有副卫细胞,并在叶脉间形成纵向气孔带。表皮细胞长方形,气孔带与非气孔带处表皮细胞的形态和大小差异较明显。麦冬气孔周围的表皮细胞平周壁具明显瘤状突起,导致气孔下陷;土麦冬气孔周围的表皮细胞平周壁呈波浪状突起,使气孔相对下陷;阔叶土麦冬气孔周围的表皮细胞平周壁基本无突起,气孔不下陷。3种植物的叶表皮均有发达的角质层和丰富的蜡质,且蜡质主要分布于下表皮气孔带处。这些结构特征可能与它们所具有的喜阳、耐阴和耐旱等特性有一定的相关性。展开更多
Five preparation methods were used to purify the crude polysaccharide which was the co\|products of preparation saponin from \%Ophiopogonis japonicus \%(Thunb.) Ker\|Gawl. The results indicate that the method of enzym...Five preparation methods were used to purify the crude polysaccharide which was the co\|products of preparation saponin from \%Ophiopogonis japonicus \%(Thunb.) Ker\|Gawl. The results indicate that the method of enzyme hydrolysis could purify the crude polysaccharide efficiently. The content of polysaccharide is more than 85% and could be used as the foods and medicine raw material. Advanced test showed that the polysaccharide is mainly consist of glucose, fructose, xylose,rhamnose and galactose.展开更多
基金Supported by Program for Changjiang ScholarsInnovative Research Team in University(No.IRT0413).
文摘Introduction The tuber of Ophiopogon japonicus ( L. f) Ker- Gawl, which is a Chinese traditional medicine named "maidong" have been recorded to have various medical functions for curing cardiovascular diseases and bacterial infections, especially heart diseases. Phytochemical studies on this plant were reported previously. In search of new and bioactive components from Chinese traditional medicines, the tubers of Ophiopogon japonicus have been investigated in this study. The present paper article covers the isolation and structure elucidation of a new furospirostanol saponin, namely, Ophiofurospiside B (compound 1 ) and two known steroidal saponins ( compounds 2 and 3).
基金the National Nature Science Foundation of China (No.30772890)the Program of Progressing Beijing New Medicine Subject Group (XK100270569)the Key Project of Chinese Ministry of Education (No.108132).
文摘Two new steroidal glucosides, 26-O-β-D-glucopyranosyl (25S)-furost-5-ene-1β,3β,22α,26-tetraol l-O-β-D-xylopyranosyl- (1 → 3)-[α-h-rhamnopyranosyl-(1 → 2)]-[β-D-fueopyranoside and (25R) spirost-5-ene-3β,14α-diol-3-β-O-β-L-rhanmopyranosyl- (1 → 2)-[β-D-xylopyranosyl(1 → 4)]-[-β-D-glucopyranoside, were isolated from the Ophiopogon japonicus (L.f.) Ker-Gaw. Their structures were elucidated by spectroscopic methods.
文摘从麦冬(Ophiopogon japonicus)和菊三七(Gynura japonica)2种药用植物根部共分离得到47株内生放线菌,其中分离自麦冬的有24株,分离自菊三七的有23株。对47菌株进行了分泌胞外淀粉酶、蛋白酶、脂肪酶和纤维素酶特性的研究。结果表明:从以上2种药用植物中分离得到的内生放线菌中具有产胞外淀粉酶活性的菌株39株,产纤维素酶活性的菌株17株,产蛋白酶活性的菌株36株,既能产淀粉酶,又能产纤维素酶和蛋白酶的菌种有15株,没有筛选到产脂肪酶的菌株。对其中部分菌株进行了16S r DNA序列系统发育分析,可知,绝大多数内生放线菌为链霉菌(Streptomyces),其次为小单孢菌属(Micromonospora)放线菌。
文摘用光镜和扫描电镜观察了麦冬〔Ophiopogon japonicus(L.f.)Ker-Gawl.〕、土麦冬(Liriope spicataLour.)和阔叶土麦冬(L.platyphyllaWang et Tang)叶表皮显微结构、亚显微结构和角质层内表面的形态结构。结果表明,气孔主要分布于麦冬、土麦冬和阔叶土麦冬叶片的下表皮,气孔密度分别为76.4、114.3和99.8个.mm-2;仅阔叶土麦冬叶片上表皮有少量气孔分布。3种植物的气孔器均不具有副卫细胞,并在叶脉间形成纵向气孔带。表皮细胞长方形,气孔带与非气孔带处表皮细胞的形态和大小差异较明显。麦冬气孔周围的表皮细胞平周壁具明显瘤状突起,导致气孔下陷;土麦冬气孔周围的表皮细胞平周壁呈波浪状突起,使气孔相对下陷;阔叶土麦冬气孔周围的表皮细胞平周壁基本无突起,气孔不下陷。3种植物的叶表皮均有发达的角质层和丰富的蜡质,且蜡质主要分布于下表皮气孔带处。这些结构特征可能与它们所具有的喜阳、耐阴和耐旱等特性有一定的相关性。
文摘Five preparation methods were used to purify the crude polysaccharide which was the co\|products of preparation saponin from \%Ophiopogonis japonicus \%(Thunb.) Ker\|Gawl. The results indicate that the method of enzyme hydrolysis could purify the crude polysaccharide efficiently. The content of polysaccharide is more than 85% and could be used as the foods and medicine raw material. Advanced test showed that the polysaccharide is mainly consist of glucose, fructose, xylose,rhamnose and galactose.