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Company: Carl Roth
Catalog#: 9062
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Wheat Root-dip Inoculation with Fusarium graminearum and Assessment of Root Rot Disease Severity
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Date:
2017-03-20
[Abstract]  Fusarium graminearum is one of the most common and potent fungal pathogens of wheat (Triticum aestivum) and other cereals, known for causing devastating yield losses and mycotoxin contaminations of food and feed. The pathogen is mainly considered as a paradigm for the floral disease Fusarium head blight, while its ability to colonize wheat plants via root infection has been examined recently. F. graminearum has a unique infection strategy which comprises complex, specialized structures and processes. Root colonisation negatively affects plant development and leads to systemic plant invasion by tissue-adapted fungal strategies. The pathosystem wheat root - F. graminearum makes available an array of research areas, such as (i) the relatively unknown root ... [摘要]  禾本科镰刀菌是小麦(小麦)和其他谷物中最常见和最有效的真菌病原体之一,已知会引起食品和饲料的破坏性产量损失和霉菌毒素污染。病原体主要被认为是镰刀菌枯萎病花粉病的典范,而最近已经检查了通过根系感染定植小麦植物的能力。 F。 graminearum 具有独特的感染策略,包括复杂的专门结构和过程。根系定殖对植物发育负面影响,并导致组织适应真菌策略的全身植物侵袭。小麦根系 - 小麦根。 graminearum 提供了一系列研究领域,例如(i)与坏死性病原体相对未知的根系相互作用; (ii)有助于(总体)镰刀菌抗性的基因和途径; (iii)诱导全身(全植株)抗性; (iv)各种宿主组织中的致病策略;和(v)对幼苗和成年植物(根/穗)感染的单基因型应答的年龄相关变化。提出的镰刀菌根腐病生物测定可以有效地感染小麦根,评估疾病的严重性和进展以及疾病动态的统计分析。

背景 根腐病(FRR)生物测定法使用根浸法进行接种,结合不同的疾病严重性参数测量。本协议主要适用于其他根真菌相互作用的研究。所提出的根浸接种被证明是一种有效和可靠的方法来研究小麦根 - 镰刀菌相互作用(表型和组织学)和筛选小麦基因型对根系感染的响应(Wang et al。 al 。,2015)。使用描述的方案,FRR疾病的遗传,分子和代谢组学方面同时经过不同研究方法的生物学重复和一致性观察结果的可靠结果进行了检查。这一点与在黄萎病的研究中所作的观察结果相对应,其特征在于在浸种或浸种方法方面的有效性和可靠性优于根浸渍(Trapero等人< ...

Multiplexed GuideRNA-expression to Efficiently Mutagenize Multiple Loci in Arabidopsis by CRISPR-Cas9
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Date:
2017-03-05
[Abstract]  Since the discovery of the CRISPR (clustered regularly interspaced short palindromic repeats)-associated protein (Cas) as an efficient tool for genome editing in plants (Li et al., 2013; Shan et al., 2013; Nekrasov et al., 2013), a large variety of applications, such as gene knock-out, knock-in or transcriptional regulation, has been published. So far, the generation of multiple mutants in plants involved tedious crossing or mutagenesis followed by time-consuming screening of huge populations and the use of the Cas9-system appeared a promising method to overcome these issues. We designed a binary vector that combines both the coding sequence of the codon optimized Streptococcus pyogenes Cas9 nuclease under the control of the Arabidopsis thaliana ... [摘要]  自从发现CRISPR(聚集的定期交织的短回文重复) - 相关蛋白(Cas)作为植物基因组编辑的有效工具(Li等人,2013; Shan等人已经出版了诸如基因敲除,敲入或转录调控等各种各样的应用,例如,2013; Nekrasov等人,2013)。到目前为止,植物中多种突变体的产生涉及繁琐的杂交或诱变,随后大量人群的耗时筛选,Cas9系统的使用似乎是有希望的方法来克服这些问题。我们设计了一种二元载体,其结合了在拟南芥UBIQUITIN10(UBQ10)启动子和引导RNA(gRNA)控制下的优化的化脓性链球菌(Caspase)密码子的编码序列)由 A驱动的表现盒。拟南芥U6 - 启动子,用于在拟南芥中进行有效的多重编辑(阎等人,2016年)。在这里,我们描述了一个逐步的方案,以经济有效的方式生成含有多个gRNA的二元载体和基于经典克隆方法的Cas9核酸酶。背景 RNA引导的Cas9系统源于针对外源DNA的细菌防御系统(Sorek等人,2013)。由于其高效率,易于处理和多重编辑的可能性,已经被认为是基因组编辑的选择方法。通常,Cas9基因编辑系统涉及单个合成RNA分子,其指导Cas9蛋白质靶向所需DNA位点以进行基因组修饰或转录控制的gRNA。 gRNA-Cas9复合物通过gRNA-DNA配对识别靶向的DNA,并需要存在原始相邻基序(PAM)。 ...

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