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Parafilm

Company: HIMEDIA
Catalog#: LA017
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A Quick Method for Screening Biocontrol Efficacy of Bacterial Isolates against Bacterial Wilt Pathogen Ralstonia solanacearum in Tomato
Author:
Date:
2020-11-20
[Abstract]  

Ralstonia solanacearum is a bacterial phytopathogen able to cause bacterial wilt disease in more than 200 plant species. Plant disease biocontrol strategies are used for controlling this disease and tomato is used as a model plant to conduct R. solanacearum associated studies. Conventional screening methods such as seed bacterization, soil drenching and root bacterization (in grown plants) to assess the ability of biocontrol bacteria to antagonize R. solanacearum under in planta conditions in different hosts are time-consuming and costly. A fast, cost effective method is a key requirement to advance the research on R. solanacearum biocontrol. In this protocol, we have inoculated the roots of tomato seedlings with bacterial isolates showing antagonistic activity against R. solanacearum

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[摘要]  [摘要]青枯雷尔氏菌是能够导致青枯病在超过2个细菌植物病原体00植物物种。植物病害生物防治策略用于控制这种疾病和番茄被用来作为模式植物进行青枯菌相关的研究。常规的筛选方法,例如种子杀菌,土壤浸湿和根部杀菌(在生长中的植物中),以评估生物控制细菌在不同宿主中在植物条件下拮抗青枯菌的能力,既耗时又昂贵。一个快速,经济有效的方法是推动研究的关键要求 青枯菌生物防治。在此协议中,我们已在细菌的分离株上接种了番茄幼苗的根,这些分离株在体外条件下显示出对茄青枯菌的拮抗活性。用拮抗细菌处理16小时后,通过成熟的根浸法将青枯菌接种到幼苗中。然后将幼苗保持在受控条件和枯萎/死苗的数目,记录最多10个天交ř 。青枯菌接种。从每个测试的分离物的记录计算生物防治效力。此协议是比在感测已经可用的协议的优点在于,它可以在很短的持续时间内完成(〜18天番茄)并且没有保持苗培养介质的需求。该方法可用于在短时间内以最小的成本快速筛选大量细菌分离株和不同宿主基因型。

[背景[ Ralstonia solanacearum ]是一种土壤传播的细菌性植物病原体,在200多个农作物中引起细菌性枯萎病,代表50个不同的科(Seleim等人,2014),其中大部分来自茄科(Thera等人,2010)。它可以在土壤中壮成长长达数年之久,并具有在寄主到达时感染的能力(Coutinho and ...

In vitro Chaperone Activity Assay Using α-Amylase as Target Protein
Author:
Date:
2018-06-20
[Abstract]  Small heat shock proteins (sHSP) are stress proteins which are ubiquitously found in almost all living organisms. They function as molecular chaperones, which assist in protein folding during translation and in the prevention of irreversible protein aggregation under denaturing conditions. This protocol describes the use of α-amylase as target protein in assessing the chaperone activity of wild and mutant recombinant small heat shock proteins of Mycobacterium leprae. Chaperone activity of these proteins, along with α-crystallin, a standard sHSP was demonstrated using a new method employing their protective effect against heat denaturation of α-amylase from porcine pancreas. The regained enzymatic activity of the α-amylase was demonstrated on starch agar plates stained with ... [摘要]  小热休克蛋白(sHSP)是在几乎所有生物体中无处不在发现的应激蛋白。 它们作为分子伴侣起作用,这有助于在翻译过程中蛋白质折叠以及在变性条件下预防不可逆的蛋白质聚集。 该协议描述了使用α-淀粉酶作为靶蛋白来评估麻风分枝杆菌的野生和突变重组小热休克蛋白的分子伴侣活性。 这些蛋白质的陪伴分子活性以及标准sHSP的α-晶状体蛋白通过采用其对猪胰α-淀粉酶的热变性的保护作用的新方法被证实。 在用碘 - 碘化钾(I 2 -KI)溶液染色的淀粉琼脂平板上证实α-淀粉酶的重新酶活性。

【背景】热休克蛋白(HSPs)是一组保守的蛋白质,当细胞暴露于外部应激(包括热应激和冷应激)时诱导蛋白质。该组中的大多数成员在功能上与蛋白质折叠和解折叠机制有关。小热休克蛋白(sHSPs)是热休克蛋白的子集,其分子大小为12至43kDa,并且保守的C末端区域称为'α-晶域'。 sHSP通过与部分未折叠的蛋白结合并阻止其完全变性而显示ATP非依赖性分子伴侣活性。有几种用于证明sHSPs的体外伴侣蛋白活性的方法,其使用各种底物蛋白如RuBisCO(Goloubinoff等人,1989),rhodanese(Mendoza等人(Farahbakhsh等,1995),溶菌酶(Rozema和Gellman,1996),苹果酸脱氢酶(Lee等, ...

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