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Application of RNAi technology in forest trees. RNAi技术在林木中的应用。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0054
M. Fladung, H. Häggman, S. Sutela
Abstract A diverse set of small RNAs is involved in the regulation of genome organization and gene expression in plants. These regulatory sRNAs play a central role for RNA in evolution and ontogeny in complex organisms, including forest tree species, providers of indispensable ecosystem services. RNA interference is a process that inhibits gene expression by double-stranded RNA and thus causes the degradation of target messenger RNA molecules. Targeted gene silencing by RNAi has been utilized in various crop plants in order to enhance their characteristics. For forest tree species, most of the successful RNAi modification has been conducted in poplar. Over the past 20 years, successful RNAi-mediated suppression of gene expression has been achieved with a variety of economically important traits. Moreover, the stability of RNAi-mediated transgene suppression has been confirmed in field-grown poplars. In this chapter, we describe examples of successful RNAi applications mainly in poplar but also provide some information about application of RNAi in pest control in forest tree species. Advantages and disadvantages of this technology with respect to the particular features of forest tree species will be discussed.
多种小rna参与了植物基因组组织和基因表达的调控。这些调控RNA在复杂生物的进化和个体发育中发挥着核心作用,包括森林树种,提供不可或缺的生态系统服务。RNA干扰是通过双链RNA抑制基因表达,从而导致目标信使RNA分子降解的过程。RNAi靶向基因沉默已被广泛应用于多种作物中,以提高其特性。对于森林树种,大多数成功的RNAi修饰都是在杨树上进行的。在过去的20年里,rnai介导的基因表达抑制已经成功地实现了多种经济上重要的性状。此外,rnai介导的转基因抑制在大田杨树中的稳定性已得到证实。在本章中,我们主要描述了RNAi在杨树中的成功应用实例,同时也提供了RNAi在森林树种病虫害防治中的一些应用信息。针对森林树种的特点,将讨论该技术的优点和缺点。
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引用次数: 0
The stability of dsRNA during external applications - an overview. dsRNA在外部应用中的稳定性综述。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0094
I. Pantchev, G. Rakleova, A. Atanassov
Abstract The research community is deeply convinced that RNA is unstable in the environment. Its roots rise from numerous failed attempts to isolate functional cellular RNA molecules. Further support had originated from the fast turnover of RNA in the cells. The situation changed recently with the discovery that externally applied dsRNA can produce targeted gene silencing in plant-feeding insects. First results have demonstrated that external dsRNA can successfully pass the insect gastrointestinal tract and reach its final destination within the body cells. This was somewhat unexpected and sparked new interest in RNA stability in the environment and its fate in the insect organism. In this brief review we make an attempt to summarize current knowledge and to propose a model of how dsRNA can perform its function under these settings.
研究人员深信RNA在环境中是不稳定的。它起源于无数次分离功能性细胞RNA分子的失败尝试。进一步的支持来自于细胞中RNA的快速周转。最近,外界应用dsRNA可以在植食性昆虫中产生靶向基因沉默的发现改变了这种情况。初步结果表明,外部dsRNA可以成功通过昆虫胃肠道并到达其在体细胞内的最终目的地。这有点出乎意料,并引发了对RNA在环境中的稳定性及其在昆虫有机体中的命运的新兴趣。在这篇简短的综述中,我们试图总结当前的知识,并提出一个dsRNA如何在这些设置下发挥其功能的模型。
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引用次数: 0
The economics of RNAi-based innovation: from the innovation landscape to consumer acceptance. 基于rnai的创新经济学:从创新前景到消费者接受度。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0159
V. Ventura, D. Frisio
Abstract RNA interference (RNAi) is an innovative technology of gene silencing which offers great opportunities for the development of sustainable solutions for crop protection. This chapter discusses the market potential of RNAi innovation, the application of RNAi for biocontrol, and stakeholder and consumer perceptions of RNAi technologies.
摘要RNA干扰(RNAi)是一种创新的基因沉默技术,它为作物保护的可持续解决方案的发展提供了巨大的机会。本章讨论了RNAi创新的市场潜力,RNAi在生物防治中的应用,以及利益相关者和消费者对RNAi技术的看法。
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引用次数: 0
Small talk and large impact: the importance of small RNA molecules in the fight against plant diseases. 闲聊,大影响:小RNA分子在对抗植物疾病中的重要性。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0086
Zhen Liao, Kristian Persson Hodén, C. Dixelius
Abstract This short and general chapter summarizes how plants and pathogens communicate using not only proteins for recognition and signal transduction or other metabolites but also RNA molecules where small RNAs with sizes between 21 to 40 nt are most important. These small RNAs can move between plants and a range of interacting pathogenic organisms in both directions, that is, a 'cross-kingdom' communication process. The first reports on RNA-based communications between plants and plant pathogenic fungi appeared about 10 years ago. Since that time, we have learnt much about sRNA biology in plants and their function in different parasitic organisms. However, many questions on the processes involved remain unanswered. Such information is crucial in order to sustain high crop production. Besides giving a brief background, we highlight the interactions between the potato late blight pathogen and its plant host potato.
这一简短而概括的章节总结了植物和病原体如何通过蛋白质进行识别和信号转导或其他代谢物,以及RNA分子进行交流,其中大小在21到40 nt之间的小RNA是最重要的。这些小rna可以在植物和一系列相互作用的致病生物之间双向移动,即“跨界”通信过程。关于植物和植物病原真菌之间基于rna的交流的第一批报道出现在大约10年前。从那时起,我们对植物中的sRNA生物学及其在不同寄生生物中的作用有了更多的了解。然而,有关过程的许多问题仍未得到解答。这些信息对于维持高作物产量至关重要。除了简要介绍背景外,我们还重点介绍了马铃薯晚疫病病菌与其植物寄主马铃薯之间的相互作用。
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引用次数: 0
Boosting dsRNA delivery in plant and insect cells with peptide- and polymer-based carriers: case-based current status and future perspectives. 利用多肽和聚合物载体促进植物和昆虫细胞中的dsRNA递送:基于案例的现状和未来展望。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0102
Kristof de Schutter, O. Christiaens, C. N. Taning, G. Smagghe
Abstract Since the discovery of this naturally occurring endogenous regulatory and defence mechanism, RNA interference (RNAi) has been exploited as a powerful tool for functional genomic research. In addition, it has evolved as a promising candidate for a sustainable, specific and ecofriendly strategy for pest management and plant improvement. A key element in this technology is the efficient delivery of dsRNAs into the pest or plant tissues. While several examples using transgenic plants expressing the dsRNAs have proved the potential of this technology, nontransgenic approaches are investigated as alternatives, allowing flexibility and circumventing technical limitations of the transgenic approach. However, the efficacy of environmental RNAi is affected by several barriers, such as extracellular degradation of the dsRNA, inefficient internalization of the dsRNA in the cell and low endosomal escape into the cytoplasm, resulting in variable or low RNAi responses. In the medical field, carrier systems are commonly used to enhance RNA delivery and these systems are being rapidly adopted by the agricultural industry. Using four case studies, this chapter demonstrates the potential of carriers to improve the RNAi response in pest control for aquatic-living mosquito larvae and RNAi-resilient Lepidoptera and to cross the plant cell wall, allowing efficient environmental RNAi in plants.
自发现这种自然发生的内源性调控和防御机制以来,RNA干扰(RNAi)已被用作功能基因组研究的有力工具。此外,它已发展成为害虫管理和植物改良的可持续、具体和生态友好战略的有希望的候选者。该技术的一个关键要素是将dsrna有效地递送到害虫或植物组织中。虽然一些使用转基因植物表达dsRNAs的例子已经证明了这项技术的潜力,但非转基因方法作为替代方法进行了研究,允许灵活性并绕过转基因方法的技术限制。然而,环境RNAi的效果受到几个障碍的影响,如dsRNA的细胞外降解、dsRNA在细胞内的低效内化和低内体逃逸到细胞质中,导致可变或低RNAi反应。在医学领域,载体系统通常用于增强RNA的传递,这些系统正在迅速被农业采用。通过四个案例研究,本章展示了载体在水生蚊子幼虫和抗RNAi鳞翅目的害虫防治中提高RNAi反应的潜力,以及通过植物细胞壁,实现高效的植物环境RNAi。
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引用次数: 9
Gene silencing or gene editing: the pros and cons. 基因沉默或基因编辑:利弊。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0047
H. Jones
Abstract Research into plant genetics often requires the suppression or complete knockout of gene expression to scientifically validate gene function. In addition, the phenotypes obtained from gene suppression can occasionally have commercial value for plant breeders. Until recently, the methodological choices to achieve these goals fell into two broad types: either some form of RNA-based gene silencing; or the screening of large numbers of natural or induced random genomic mutations. The more recent invention of gene editing as a tool for targeted mutation potentially gives researchers and plant breeders another route to block gene function. RNAi is widely used in animal and plant research and functions to silence gene expression by degrading the target gene transcript. Although RNAi offers unique advantages over genomic mutations, it often leads to the formation of a genetically modified organism (GMO), which for commercial activities has major regulatory and acceptance issues in some regions of the world. Traditional methods of generating genomic mutations are more laborious and uncertain to achieve the desired goals but possess a distinct advantage of not being governed by GMO regulations. Gene editing (GE) technologies have some of the advantages of both RNAi and classical mutation breeding in that they can be designed to give simple knockouts or to modulate gene expression more subtly. GE also has a more complex regulatory position, with some countries treating it as another conventional breeding method whilst the EU defines GE as a technique of genetic modification and applies the normal GMO authorization procedures. This chapter explores the pros and cons of RNAi alongside other methods of modulating gene function.
摘要植物遗传学研究往往需要抑制或完全敲除基因表达,以科学地验证基因功能。此外,通过基因抑制获得的表型有时对植物育种家具有商业价值。直到最近,实现这些目标的方法选择分为两大类:要么是某种形式的基于rna的基因沉默;或筛选大量的自然或诱导随机基因组突变。最近发明的基因编辑作为靶向突变的工具,可能为研究人员和植物育种者提供了另一条阻断基因功能的途径。RNAi广泛应用于动物和植物研究,其功能是通过降解靶基因转录物来沉默基因表达。尽管RNAi比基因组突变具有独特的优势,但它经常导致转基因生物(GMO)的形成,这对于商业活动在世界一些地区具有重大的监管和接受问题。产生基因组突变的传统方法在实现预期目标方面更加费力和不确定,但具有不受转基因生物法规约束的明显优势。基因编辑(GE)技术具有RNAi和经典突变育种的一些优点,因为它们可以被设计成简单的敲除或更微妙地调节基因表达。通用电气的监管地位也更为复杂,一些国家将其视为另一种传统的育种方法,而欧盟将其定义为一种转基因技术,并适用正常的转基因生物授权程序。本章探讨了RNAi与其他调节基因功能的方法的优缺点。
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引用次数: 1
The 'Trojan horse' approach for successful RNA interference in insects. 成功干扰昆虫RNA的“特洛伊木马”方法。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0025
D. Kontogiannatos, Anna Kolliopoulou, L. Swevers
Abstract Since the discovery of RNA interference in 1998 as a potent molecular tool for the selective downregulation of gene expression in almost all eukaryotes, increasing research is being performed in order to discover applications that are useful for the pharmaceutical and chemical industry. The ease of use of double-stranded RNA for targeted in vivo gene silencing in animal cells and tissues gave birth to a massive interest from industry in order to discover biotechnological applications for human health and plant protection. For insects, RNAi became the 'Holy Grail' of pesticide manufacturing, because this technology is a promising species-specific environmentally friendly approach to killing natural enemies of cultured plants and farmed animals. The general idea to use RNAi as a pest-control agent originated with the realization that dsRNAs that target developmentally or physiologically important insect genes can cause lethal phenotypes as a result of the specific gene downregulation. Most importantly to achieve this, dsRNA is not required to be constitutively expressed via a transgene in the targeted insect but it can be administrated orally after direct spraying on the infested plants. Similarly, dsRNAs can be administered to pests after constitutive expression as a hairpin in plants or bacteria via stable transgenesis. Ideally, this technology could have already been applied in integrated pest management (IPM) if improvements were not essential in order to achieve higher insecticidal effects. There are many limitations that decrease RNAi efficiency in insects, which arise from the biochemical nature of the insect gut as well as from deficiencies in the RNAi core machinery, a common phenomenon mostly observed in lepidopteran species. To overcome these obstacles, new technologies should be assessed to ascertain that the dsRNA will be transferred intact, stable and in high amounts to the targeted insect cells. In this chapter we will review a wide range of recent discoveries that address the delivery issues of dsRNAs in insect cells, with a focus on the most prominent and efficient technologies. We will also review the upcoming and novel use of viral molecular components for the successful and efficient delivery of dsRNA to the insect cell.
自1998年发现RNA干扰作为一种在几乎所有真核生物中选择性下调基因表达的有效分子工具以来,越来越多的研究正在进行,以发现对制药和化学工业有用的应用。双链RNA易于在动物细胞和组织中用于靶向体内基因沉默,这引起了工业界的极大兴趣,以便发现生物技术在人类健康和植物保护方面的应用。对于昆虫来说,RNAi成为了农药制造的“圣杯”,因为这项技术是一种很有前途的、针对特定物种的环保方法,可以杀死养殖植物和养殖动物的天敌。使用RNAi作为害虫防治剂的一般想法起源于这样一种认识,即针对发育或生理上重要的昆虫基因的dsRNAs可以由于特定基因的下调而导致致死性表型。最重要的是,为了实现这一目标,dsRNA不需要通过转基因在目标昆虫中组成性表达,而是可以在直接喷洒在受感染植物上后口服给药。类似地,dsRNAs可以通过稳定的转基因在植物或细菌中作为发夹组成表达后施用于害虫。理想情况下,如果不需要为达到更高的杀虫效果而进行改进,这项技术可能已经应用于虫害综合管理。由于昆虫肠道的生化特性以及RNAi核心机制的缺陷,昆虫中RNAi效率的降低存在许多局限性,这是鳞翅目物种中最常见的现象。为了克服这些障碍,应该评估新技术,以确定dsRNA将完整、稳定和大量地转移到目标昆虫细胞中。在本章中,我们将回顾最近在解决dsrna在昆虫细胞中的传递问题方面的广泛发现,重点是最突出和最有效的技术。我们还将回顾病毒分子成分在成功和有效地将dsRNA传递到昆虫细胞中的最新应用。
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引用次数: 3
Biogenesis and functional RNAi in fruit trees. 果树的生物发生与功能RNAi。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0040
M. Ravelonandro, P. Briard
Abstract In plants, genome expression is linked to the transcribed mRNAs that are synthesized by RNA polymerase. Following its move to the cytoplasm, the generated mRNA is briefly translated to the encoded protein. If transcription and translation are dependent on the family of RNA polymerase, these two phenomena could be interfered with through the process designated as gene regulation. Thus, large molecules of RNA (single-stranded or double-stranded) consequently sliced into small molecules produce nascent small interfering RNA ranging from 21 to 27 nucleotides. This chapter revisits the biogenesis of these two types of RNAi, miRNA and siRNA, and notably their involvement in plant gene regulation. Following their sequential transcription and their specific involvement, we will consider the sources and roles of RNA interference in plants and we will look at their detection in fruit crops. We discuss their applications and the risk assessment studies in fruit crops.
在植物中,基因组表达与RNA聚合酶合成的转录mrna有关。在进入细胞质后,产生的mRNA被短暂地翻译成编码的蛋白质。如果转录和翻译依赖于RNA聚合酶家族,则这两种现象可能通过称为基因调控的过程受到干扰。因此,大分子RNA(单链或双链)随后被切成小分子,产生新生的小干扰RNA,范围从21到27个核苷酸。本章回顾了这两种类型的RNAi, miRNA和siRNA的生物发生,特别是它们在植物基因调控中的作用。根据它们的顺序转录和它们的具体参与,我们将考虑RNA干扰在植物中的来源和作用,我们将研究它们在水果作物中的检测。讨论了它们在水果作物中的应用及风险评价研究。
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引用次数: 0
Future plant solutions by interfering RNA and key messages for communication and dissemination. 未来植物解决方案通过干扰RNA和关键信息的沟通和传播。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0167
H. Opsahl-Sorteberg
Abstract Communication is an increasing prerequisite to justify academic existence and value, and for project funding of all kinds to show relevance and value, including the future of European networks like COST Actions. Academia is slowly adapting to this expectation and learning the profession of communication. Language and vocabulary are key issues in communication, and particularly to reach the many important non-scientific audiences. Therefore, this chapter starts with a description of some new plant breeding technologies relevant for communicating, in general terms, the science behind plant improvement. This is followed by selected examples of the application of these techniques to improve current and future crop varieties. Finally, key messages gathered from the European iPLANTA project for policy makers, non-specialists and specially interested citizens are communicated. This is to show a wider audience how RNAi can contribute to sustainable food solutions and food security with minimal environmental impacts.
沟通是证明学术存在和价值的先决条件,也是各种项目资助显示相关性和价值的先决条件,包括欧洲网络的未来,如成本行动。学术界正在慢慢适应这种期望,学习传播专业。语言和词汇是沟通的关键问题,特别是要达到许多重要的非科学受众。因此,本章首先描述一些新的植物育种技术,这些技术与交流有关,总的来说,植物改良背后的科学。然后是应用这些技术改良当前和未来作物品种的选定实例。最后,向决策者、非专业人士和特别感兴趣的公民传达从欧洲iPLANTA项目收集的关键信息。这是为了向更广泛的受众展示RNAi如何在对环境影响最小的情况下为可持续粮食解决方案和粮食安全做出贡献。
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引用次数: 0
Gene silencing to induce pathogen-derived resistance in plants. 基因沉默诱导植物病原菌源性抗性。
Pub Date : 1900-01-01 DOI: 10.1079/9781789248890.0004
E. Zuriaga, Á. Polo-Oltra, M. Badenes
Abstract This chapter provides information on the history of the use of pathogen-derived resistance (PDR) in plants and use of PDR for basic research and commercial purposes. Some limitations of the RNA interference (RNAi) technology are presented and various tools that can be used to design RNAi constructs and screen for potential off-target effects are also discussed.
摘要本章介绍了病原菌来源抗性(PDR)在植物中的应用历史,以及PDR在基础研究和商业用途上的应用。介绍了RNA干扰(RNAi)技术的一些局限性,并讨论了可用于设计RNAi构建体和筛选潜在脱靶效应的各种工具。
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引用次数: 0
期刊
RNAi for plant improvement and protection
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