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SmartSpecTM 3000 Spectrophotometer

SmartSpec TM 3000分光光度计

Company: Bio-Rad Laboratories
Catalog#: SmartSpecTM 3000
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Quantification of Densities of Bacterial Endosymbionts of Insects by Real-time PCR
Author:
Date:
2017-10-05
[Abstract]  Increased attention has been paid to the endosymbiotic bacteria of insects. Because most insect endosymbionts are uncultivable, quantitative PCR (qPCR) is a practical and convenient method to quantify endosymbiont titers. Here we report a protocol for real-time qPCR based on SYBR Green I fluorescence as well as some tips to prevent possible pitfalls. [摘要]  昆虫的内共生菌已被越来越多的关注。 因为大多数昆虫内共生体是不可想象的,所以定量PCR(qPCR)是量子内分泌滴度的实用和方便的方法。 这里我们报告一个基于SYBR Green I荧光的实时qPCR协议,以及一些防止可能的陷阱的提示。
【背景】昆虫通常在其身体中存在各种分类群的细菌共生体。 这种细菌共生体(内共生菌)由于对宿主昆虫的深刻影响而引起了极大的关注。 一些细菌为其宿主提供必要的营养(Baumann等人,1995),一些赋予抗寄生虫的抗性(Oliver等人,2003; Hedges等人 ,2008),有些甚至操纵他们的主机的繁殖或性别决定为自己的利益(Werren等人,2008; Kageyama等人。 ,2012)。 因为大多数昆虫内共生体是不可复制的,所以定量PCR(qPCR)是量子内分泌滴度的实用和方便的方法(Simoncini等人,2001),可能由其他可视化方法补充,例如荧光 >原位杂交(FISH)(Koga等人,2009)和/或电子显微镜。

An Assay to Study Botrytis cinerea-infected Grapevine Leaves Primed with Pseudomonas fluorescens
Author:
Date:
2016-10-05
[Abstract]  Grapevine (Vitis vinifera L.) is susceptible to an array of diseases among them the grey mold caused by the necrotrophic fungus Botrytis cinerea that decreases grape productivity and quality. To ensure a satisfactory yield and harvest quality numerous chemical fungicides are required, but they have serious drawbacks. One alternative is the use of beneficial bacteria to improve plant health. Pseudomonas fluorescens has been shown to trigger a plant-mediated resistance response in aboveground plant tissues against fungal, oomycete, bacterial, and viral pathogens. Triggered plant resistance exploits mechanisms of the plant immune system through a priming state that provides plants with enhanced capacity for rapid and strong activation of defense responses after ... [摘要]  葡萄(葡萄(Vitis vinifera)L.)易受一系列疾病的影响,其中包括由坏死性真菌葡萄孢菌引起的灰霉病,其降低葡萄生产力和质量。为了确保令人满意的产量和收获质量,需要许多化学杀真菌剂,但它们具有严重的缺点。一个替代方案是使用有益细菌来改善植物健康。已经显示荧光假单胞菌在地上植物组织中触发植物介导的对真菌,卵菌,细菌和病毒病原体的抗性反应。触发的植物抗性通过启动状态利用植物免疫系统的机制,其提供植物在病原体感染后快速和强烈地激活防御反应的增强能力,导致较低的适合度成本。有益细菌的引发应答包括防御相关基因的诱导表达,细胞壁增强和病原体感染后次生代谢产物的产生。在该方案中,我们描述了根据Verhagen评价有益细菌荧光假单胞菌PTA-CT2对葡萄植​​物的引发状态及其对灰葡萄孢的抗性水平的实验设计等。 (2011)和Gruau等人。 (2015)。

Assays to Assess Virulence of Xanthomonas axonopodis pv. manihotis on Cassava
Author:
Date:
2015-07-05
[Abstract]  Cassava (Manihot esculenta) is a root crop that provides calories for people living in more than 100 tropical and subtropical countries and serves as a raw material for processing into starch and biofuels as well as feed for livestock (Howeler et al., 2013). Xanthomonas axonopodis pv. manihotis (Xam), the causal agent of cassava bacterial blight (CBB), can cause extensive crop damage (reviewed in Lopez et al., 2012; Lozano, 1986). Bacterial movement, growth in planta and the ability to cause disease symptoms are all important measures of bacterial fitness and plant susceptibility to CBB. Here we present a protocol for visualizing the movement of Xam within the plant. We also provide a detailed method of assaying bacterial growth in the ... [摘要]  木薯( Manihot esculenta )是一种根茎作物,为生活在100多个热带和亚热带国家的人们提供热量,并且作为加工成淀粉和生物燃料以及牲畜饲料的原料(Howeler et al。,2013)。 Xanthomonas axonopodis pv。木薯细菌枯萎病(CBB)的致病因子可引起广泛的作物损害(参见Lopez等人,2012; Lozano,1986)。细菌运动,植物中的生长和引起疾病症状的能力都是细菌适合性和植物对CBB敏感性的重要测量。在这里,我们提出了一个用于可视化植物中的Xam 运动的协议。我们还提供了一种详细的方法来检测木薯叶中期的细菌生长,以及叶片外质层中的细菌生长和疾病症状发展。这些方法将是确定Xam 菌株致病性和开发对CBB有抗性的木薯品种的重要工具。

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