{{'Search' | translate}}
 

Iron(III) chloride hexahydrate

氯化铁(III)六水合物

Company: Sigma-Aldrich
Catalog#: 31232
Bio-protocol()
Company-protocol()
Other protocol()

A Modified Approach for Axenic Cultivation of Spores of Fern Adiantum capillus-veneris L. with High Germination Rate
Author:
Date:
2018-07-05
[Abstract]  Spores are the primary way of spread and reproduction for ferns, a clade of seed-free vascular plants. However, no detailed protocol for ferns spore cultivation has been reported yet. Here we provide a modified approach for axenic cultivation of fern Adiantum capillus-veneris L., based on Cao’s and Li’s method (Cao, et al., 2010; Li, et al., 2013).

Our approach can be briefly divided into four steps: 1) collect spores; 2) sterilize the spores with 5% sodium hypochlorite solution and wash twice; 3) incubate the spores in liquid Knop’s medium in the dark for five days; 4) cultivate the spores on Knop's plate medium. To increase the germination rate, we constrain the sterilization time under 25 min and add dark treatment step after spore sterilization. ...
[摘要]  孢子是蕨类植物(一种无种子维管植物的分支)的传播和繁殖的主要方式。 然而,尚未报道蕨类植物孢子培养的详细方案。 在这里,我们提供了一种基于Cao和Li的方法(Cao,等,,2010; Li, et al。,2013)。

我们的方法可以简单地分为四个步骤:1)收集孢子; 2)用5%次氯酸钠溶液对孢子进行灭菌,洗涤两次; 3)在黑暗中将液体Knop培养基中的孢子培养5天; 4)在Knop的平板培养基上培养孢子。 为了提高发芽率,我们将灭菌时间限制在25分钟以下,并在孢子灭菌后加入黑暗处理步骤。 经过这些改良后,发芽率从2%提高到25%。

【背景】在植物的系统发育树中,蕨类植物是陆地植物的关键分支,因为它们是种子植物的姐妹谱系。蕨类植物具有独特的生命周期特征。与种子植物相比,蕨类植物的孢子体带有孢子而不是种子。在有利条件下,孢子萌发形成配子体,其中某些区域(肋骨)上的细胞专门生殖生殖器官以产生配子。在水依赖性受精后,新生孢子体出现并且蕨类植物的整个生命周期完成(Li et al。,2013)。因此,为了研究蕨类植物的有性生殖过程和生活史,在实验条件下进行孢子培养是必要的。

然而,可用于蕨类植物孢子培养的方案是不充分的。在此,我们选择 Adiantum capillus-veneris ...

Spectrophotometric Determination of Glutamine Synthetase Activity in Cultured Cells
Author:
Date:
2016-10-05
[Abstract]  Glutamine synthetase (GS), which catalyzes the conversion of glutamate and ammonia to glutamine, is widely distributed in animal tissues and cell culture lines. The importance of this enzyme is suggested by the fact that glutamine, the product of GS-catalyzed de novo synthesis reaction, is the most abundant free amino acid in blood (Smith and Wilmore, 1990). Glutamine is involved in many biological processes including serving as the nitrogen donor for biosynthesis, as an exchanger for the import of essential amino acids, as a means to detoxifying intracellular ammonia and glutamate, and as a bioenergetics nutrient to fuel the tricarboxylic acid (TCA) cycle (Bott et al., 2015). The method for the assay of GS enzymatic activity relies on its γ-glutamyl transferase reaction by ... [摘要]  谷氨酰胺合成酶(GS),其催化谷氨酸和氨转化成谷氨酰胺,广泛分布在动物组织和细胞培养系中。该酶的重要性通过谷氨酰胺,GS-催化的从头合成反应的产物,是血液中最丰富的游离氨基酸的事实提示(Smith和Wilmore,1990)。谷氨酰胺参与许多生物过程,包括作为生物合成的氮供体,作为输入必需氨基酸的交换剂,作为解毒细胞内氨和谷氨酸的手段,以及作为生物能量营养物来给三羧酸(TCA)周期(Bott等人,2015)。用于测定GS酶活性的方法依赖于其γ-谷氨酰转移酶反应,通过测量由谷氨酰胺和羟胺合成的γ-谷氨酰羟肟酸酯,以及反应产物与反应物的色谱分离(Deuel等人 。,1978)。 GS谷氨酰转移酶反应的概述可以在图1中找到。通过分光光度测定法在560nm的特定波长下使用酶标仪测量GS活性。该方法简单,并且具有与应用放射性标记的底物的那些方法相当的灵敏度。该修改的方法已经应用于在包括人乳腺上皮MCF10A细胞和鼠前B FL5.12细胞的培养细胞系中测定/测定GS活性,并且可以用于测量其他细胞系中的GS活性。 >


图1 。GS glutamyl ...

Comments