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di-Potassium hydrogen phosphate

Company: Carl Roth
Catalog#: P749
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Infection of Soybean Plants with the Insect Bacterial Symbiont Burkholderia gladioli and Evaluation of Plant Fitness
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Date:
2017-12-20
[Abstract]  To investigate the establishment and consequences of host-microbe interactions, it is important to develop controlled infection assays suitable for each system, as well as appropriate methods to evaluate successful infection and its associated effects. Here, we describe a procedure for bacterial inoculation of soybean plants, followed by the assessment of systemic infection and impact on plant fitness. Soybean (Glycine max) seedlings were mechanically wounded using a device that mimics insect herbivory and inoculated with known cell numbers of Burkholderia gladioli bacteria previously isolated from an insect host. The impact on the plants was evaluated by monitoring changes in height, time to flowering and chlorophyll content during plant development, and by quantifying ... [摘要]  为了研究宿主 - 微生物相互作用的建立和后果,开发适用于每个系统的受控感染测定法以及评估成功感染及其相关作用的适当方法是重要的。在这里,我们描述了大豆植物的细菌接种程序,然后评估全身感染和对植物健康的影响。使用模拟昆虫食草动物的装置对大豆(Glycine max)幼苗进行机械性伤害,并用先前从昆虫宿主分离的已知细胞数目的伯克霍尔德氏菌(B.coli)进行接种。通过监测植物发育过程中身高,开花时间和叶绿素含量的变化以及通过与用无菌水接种的植物相比量化种子产量来评估对植物的影响。使用定量PCR和荧光原位杂交(FISH)在来自发育植物的组织中检查细菌感染的存在和增殖。

微生物与不同的真核生物建立共生关系,对宿主的适应性有着深远的影响,从有益到不利(Frank,1997)。在许多情况下,这些协会是直接或间接的影响与其他生物,如潜在的替代主机相互作用。举例来说,植物,微生物和昆虫之间有许多三方相互作用,其中微生物共生体在不同宿主之间传播并影响相关生物体的生理或生态(Frago等人)。 ,2012; Gilbert et al。,2012)。在植物性的Lagriinae甲虫中,与来自植物致病性分支的细菌(Burkholderia gladioli)建立了共生伙伴关系,表明这种关联在三方相互作用的情况下发展。先前已经证明了从 Lagria villosa ...

Measurement of the Galactanase Activity of the GanB Galactanase Protein from Bacillus subtilis
Author:
Date:
2017-04-05
[Abstract]  The activity of the endo-β-1,4-galactanase GanB from B. subtilis on the high molecular weight β-1,4-galactan was determined quantitatively by the measurement of the increase of the reducing power or with the dyed substrate Azo-galactan. The generated degradation products were analyzed using thinlayer-chromatography (TLC) or high-performance anion-exchange chromatography (HPAEC). [摘要]  来自B的内切-β-1,4-半乳糖苷酶GanB的活性。 通过测量还原力的增加或染色底物偶氮半乳聚糖来定量测定高分子量β-1,4-半乳聚糖上的枯草芽孢杆菌。 使用薄层色谱(TLC)或高效阴离子交换层析(HPAEC)分析产生的降解产物。

枯草芽孢杆菌具有用于植物细胞壁多糖的综合系统,包括编码半乳聚糖利用元素的基因簇ganSPQAB(Watzlawick等人,2016)。 半乳聚糖是高分子量半乳糖,并且在果胶中被认为是I型鼠李糖半乳糖醛酸的侧链。 其降解通过内切β1,4半乳聚糖酶(EC 3.2.1.89)进行。 半乳聚糖的利用。 枯草芽孢杆菌涉及细胞外半乳聚糖酶GanB,裂解链内的高分子半乳聚糖,并产生进入细胞壁的短的低聚物进一步降解。 来自的 ganB 基因。 枯草芽孢杆菌在大肠杆菌(Watzlawick等人,2016)中克隆并表达,纯化的His标记的成熟蛋白的酶学性质由 半乳聚糖酶测定。

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