Objective:To evaluate the antiasthmatic and antitussive properties of the aqueous leaf extract of Bryophyilum pinnatum {B.pinnatum)(BP) Lam.Methods:Ovalbiunin-sensilized guinea pigs which were treated with BP for 21 c...Objective:To evaluate the antiasthmatic and antitussive properties of the aqueous leaf extract of Bryophyilum pinnatum {B.pinnatum)(BP) Lam.Methods:Ovalbiunin-sensilized guinea pigs which were treated with BP for 21 consecutive days were exposed to 0.2%histamine aerosol in a glass chamber.Mucus viscosity,white blood cell and lymphocyte counts and tracheal wall morphometry were measured.Bouts of cough were counted pre and post acute exposure of extract-treated(X7 d) guinea pigs to 7.5%citric acid aerosol in a chamber.Phenol red expectoration was estimated in mice after 7 d of daily administration of BP.Results:Doses of 200 and 400 mg/kg/day(×21 d) BP significantly increased the time for guinea pigs to experience preconvulsive dyspnoea.BP and salbutamol(0.5 mg/kg/day×21 d) reduced mucus viscosity in the sensitized group to values comparable with controls.White blood cell,lymphocyte counts and tracheal morphometry were not significantly altered.Both doses of BP also significantly reduced the bouts of cough but only 400 mg/kg/day significantly inhibited the amount of phenol red secreted.Conclusions:BP has demonstrated antiasthmatic and antitussive properties in these rodent models.These properties may underscore its use in Nigerian ethnomedicine.展开更多
A potent cytotoxic bufadienolide orthoacetate has been Isolated from Bryophyllum pinnatum. Baaed on spectral study methods, its structure was identified as bersaldegenin 1,3, 5-orthoacetate.
采用石蜡制片法对落地生根B.daigremontianum(Lam.)Oken in Allg的叶片、根和茎的结构进行了解剖学观察.结果表明:每一个叶缘凹陷处的复表皮里面都有一个不定芽,在芽原基的上部有一个明显的生长点,生长点的细胞经过生长发育形成新的植...采用石蜡制片法对落地生根B.daigremontianum(Lam.)Oken in Allg的叶片、根和茎的结构进行了解剖学观察.结果表明:每一个叶缘凹陷处的复表皮里面都有一个不定芽,在芽原基的上部有一个明显的生长点,生长点的细胞经过生长发育形成新的植株个体;解剖还发现叶片的每一个叶缘凹陷处都有一个小维管束,距叶缘凹陷处90~115 μm.叶肉细胞栅栏组织和海绵组织不明显,细胞形状类似于同化薄壁组织和储水组织,细胞大小不规则、壁薄、富含黏液,表皮细胞柱型、有复表皮2~3层.根的初生构造主根、侧根的木质部多数均为六原型,少数四原型.茎的构造与其它双子叶植物相比,落地生根的韧皮部发达,木质部退化,有髓.展开更多
伽蓝菜属(Kalanchoe)植物在园艺观赏和传统医药领域具有重要的应用价值,而且为基础理论的研究,特别是在景天科代谢途径和体细胞胚发生的分子机制探讨方面,提供了非常理想的模式系统。遗传转化方法是关系到植物性状定向改良和基因功能研...伽蓝菜属(Kalanchoe)植物在园艺观赏和传统医药领域具有重要的应用价值,而且为基础理论的研究,特别是在景天科代谢途径和体细胞胚发生的分子机制探讨方面,提供了非常理想的模式系统。遗传转化方法是关系到植物性状定向改良和基因功能研究的核心技术,能极大加速育种进程和机制挖掘。本综述系统讲述了多种伽蓝菜属植物(K. laciniata, K. blossfeldiana, K daigremontiana, K.×houghtonii, K. pinnata, K.fedtschenkoi)的遗传转化方法,并且探讨了这些方法在改造花色、叶型、株型、花期、抗衰老等应用方面以及在景天科代谢途径和细胞命运转变的机理方面的研究进展,以期为进一步开发和利用伽蓝菜属植物提供比较全面的信息资源。展开更多
文摘Objective:To evaluate the antiasthmatic and antitussive properties of the aqueous leaf extract of Bryophyilum pinnatum {B.pinnatum)(BP) Lam.Methods:Ovalbiunin-sensilized guinea pigs which were treated with BP for 21 consecutive days were exposed to 0.2%histamine aerosol in a glass chamber.Mucus viscosity,white blood cell and lymphocyte counts and tracheal wall morphometry were measured.Bouts of cough were counted pre and post acute exposure of extract-treated(X7 d) guinea pigs to 7.5%citric acid aerosol in a chamber.Phenol red expectoration was estimated in mice after 7 d of daily administration of BP.Results:Doses of 200 and 400 mg/kg/day(×21 d) BP significantly increased the time for guinea pigs to experience preconvulsive dyspnoea.BP and salbutamol(0.5 mg/kg/day×21 d) reduced mucus viscosity in the sensitized group to values comparable with controls.White blood cell,lymphocyte counts and tracheal morphometry were not significantly altered.Both doses of BP also significantly reduced the bouts of cough but only 400 mg/kg/day significantly inhibited the amount of phenol red secreted.Conclusions:BP has demonstrated antiasthmatic and antitussive properties in these rodent models.These properties may underscore its use in Nigerian ethnomedicine.
文摘A potent cytotoxic bufadienolide orthoacetate has been Isolated from Bryophyllum pinnatum. Baaed on spectral study methods, its structure was identified as bersaldegenin 1,3, 5-orthoacetate.
文摘采用石蜡制片法对落地生根B.daigremontianum(Lam.)Oken in Allg的叶片、根和茎的结构进行了解剖学观察.结果表明:每一个叶缘凹陷处的复表皮里面都有一个不定芽,在芽原基的上部有一个明显的生长点,生长点的细胞经过生长发育形成新的植株个体;解剖还发现叶片的每一个叶缘凹陷处都有一个小维管束,距叶缘凹陷处90~115 μm.叶肉细胞栅栏组织和海绵组织不明显,细胞形状类似于同化薄壁组织和储水组织,细胞大小不规则、壁薄、富含黏液,表皮细胞柱型、有复表皮2~3层.根的初生构造主根、侧根的木质部多数均为六原型,少数四原型.茎的构造与其它双子叶植物相比,落地生根的韧皮部发达,木质部退化,有髓.
文摘伽蓝菜属(Kalanchoe)植物在园艺观赏和传统医药领域具有重要的应用价值,而且为基础理论的研究,特别是在景天科代谢途径和体细胞胚发生的分子机制探讨方面,提供了非常理想的模式系统。遗传转化方法是关系到植物性状定向改良和基因功能研究的核心技术,能极大加速育种进程和机制挖掘。本综述系统讲述了多种伽蓝菜属植物(K. laciniata, K. blossfeldiana, K daigremontiana, K.×houghtonii, K. pinnata, K.fedtschenkoi)的遗传转化方法,并且探讨了这些方法在改造花色、叶型、株型、花期、抗衰老等应用方面以及在景天科代谢途径和细胞命运转变的机理方面的研究进展,以期为进一步开发和利用伽蓝菜属植物提供比较全面的信息资源。