Tree peony is well known and sought after for its large, colorful flowers. Its propagation is via vegetative methods. Mech-nisms of the adventitious rooting and the regulation of rooting processes are the principles a...Tree peony is well known and sought after for its large, colorful flowers. Its propagation is via vegetative methods. Mech-nisms of the adventitious rooting and the regulation of rooting processes are the principles and techniques of plant propagation and improvement. Microstructures and fluctuations of phytohormones in the adventitious rooting were studied with the etiolated softwood shoots of Paeonia suffruticosa 'Yinfen Jinlin'. There are no pre-primordia in the shoots of the cultivar. Adventitious roots are produced in five stages: shoot selection, primordium initiation, primordium growth, conducting tissue differentiation and root protrusion. Primordia initiated in the cortex. The contents of the endogenous hormones, IAA, ABA and GA, were 5.842, 0.873 and 1.043 nmol·g-1 FW on the bases of shoots, respectively. CTKs which included isopentenyl adenine (iPA), zeatin riboside (ZR) and dihy-drozeatin riboside (DHZR) were 0.949, 0.695 and 2.034 nmol·g-1 FW, respectively. DHZR is active among CTKs. The ratio of IAA to GA, CTK and ABA clearly increased at the stage of primordium initiation, while they showed low levels at the stages of primordium growth. The ratios were restored at the shoot levels at the stage of root protrusion. IBA provoked primordia initiation in the cortex, the vascular cambium, the pith and even in the callus induced on the base of shoots. IAA levels in the treated shoots increased gradually to its highest level (three times of control) at the stage of conducting tissue differentiation. The ratios of IAA to GA, CTK and ABA clearly decreased at the stage of primordium initiation. The ratio of IAA to ABA is regulated at 10:1.展开更多
通过查阅历代本草医籍文献和现代文献,对酸枣仁的名称、基原、产地、用药部位、炮制及功效进行考证。经考证,酸枣仁原植物最早以“棘”记载于《诗经·凯风》,《尔雅》中开始出现“酸枣”之称,明代及以后均以“酸枣仁”作为独立中药...通过查阅历代本草医籍文献和现代文献,对酸枣仁的名称、基原、产地、用药部位、炮制及功效进行考证。经考证,酸枣仁原植物最早以“棘”记载于《诗经·凯风》,《尔雅》中开始出现“酸枣”之称,明代及以后均以“酸枣仁”作为独立中药名称记载;酸枣仁的历代主流基原为鼠李科植物酸枣Ziziphus jujuba Mill.var.spinosa(Bunge)Hu ex H.F.Chou,药用部位为干燥成熟种子;其产地主要集中在太行山附近,宋明推崇陕西临潼为道地,现主产于河北、陕西、山西等地;酸枣仁的炮制方法多以炒制为主;其功效最早为主心腹寒热、补中益气,唐代以后主治不得眠。酸枣仁作为一种药食同源的中药材,该文的考证结果可以为其开发提供文献支撑。展开更多
文摘Tree peony is well known and sought after for its large, colorful flowers. Its propagation is via vegetative methods. Mech-nisms of the adventitious rooting and the regulation of rooting processes are the principles and techniques of plant propagation and improvement. Microstructures and fluctuations of phytohormones in the adventitious rooting were studied with the etiolated softwood shoots of Paeonia suffruticosa 'Yinfen Jinlin'. There are no pre-primordia in the shoots of the cultivar. Adventitious roots are produced in five stages: shoot selection, primordium initiation, primordium growth, conducting tissue differentiation and root protrusion. Primordia initiated in the cortex. The contents of the endogenous hormones, IAA, ABA and GA, were 5.842, 0.873 and 1.043 nmol·g-1 FW on the bases of shoots, respectively. CTKs which included isopentenyl adenine (iPA), zeatin riboside (ZR) and dihy-drozeatin riboside (DHZR) were 0.949, 0.695 and 2.034 nmol·g-1 FW, respectively. DHZR is active among CTKs. The ratio of IAA to GA, CTK and ABA clearly increased at the stage of primordium initiation, while they showed low levels at the stages of primordium growth. The ratios were restored at the shoot levels at the stage of root protrusion. IBA provoked primordia initiation in the cortex, the vascular cambium, the pith and even in the callus induced on the base of shoots. IAA levels in the treated shoots increased gradually to its highest level (three times of control) at the stage of conducting tissue differentiation. The ratios of IAA to GA, CTK and ABA clearly decreased at the stage of primordium initiation. The ratio of IAA to ABA is regulated at 10:1.
文摘通过查阅历代本草医籍文献和现代文献,对酸枣仁的名称、基原、产地、用药部位、炮制及功效进行考证。经考证,酸枣仁原植物最早以“棘”记载于《诗经·凯风》,《尔雅》中开始出现“酸枣”之称,明代及以后均以“酸枣仁”作为独立中药名称记载;酸枣仁的历代主流基原为鼠李科植物酸枣Ziziphus jujuba Mill.var.spinosa(Bunge)Hu ex H.F.Chou,药用部位为干燥成熟种子;其产地主要集中在太行山附近,宋明推崇陕西临潼为道地,现主产于河北、陕西、山西等地;酸枣仁的炮制方法多以炒制为主;其功效最早为主心腹寒热、补中益气,唐代以后主治不得眠。酸枣仁作为一种药食同源的中药材,该文的考证结果可以为其开发提供文献支撑。
