microbes

微生物
  • 文章类型: Journal Article
    先进的技术可以加快从微生物中发现天然产物的步伐,一直落后于药物发现时代。因此,本综述文章讨论了各种跨学科和尖端技术,以提出一种具体策略,该策略可以从已知微生物中高通量筛选新型天然化合物(NC)。最近的生物信息学方法表明,微生物基因组包含一个巨大的未开发的沉默生物合成基因簇(BGC)库。本文介绍了几种鉴定具有隐性BGC隐矿的微生物菌株的方法。此外,AntiSMASH5.0是免费的,准确,和高度可靠的生物信息学工具进行了详细讨论,以识别微生物基因组中的沉默BGC。Further,最新的微生物培养技术,HiTES(高通量诱导子筛选),已经详细描述了一次使用500-1000种不同生长条件的沉默BGC的表达。在沉默的BGC表达之后,强调了最新的质谱方法来识别NC。最近出现的LAESI-IMS(激光烧蚀电喷雾电离成像质谱)技术,这使得能够直接从微量滴定板快速鉴定新型NC,详细介绍了。最后,强调各种趋势“去复制”策略,以提高NC筛查的有效性。
    Advanced techniques can accelerate the pace of natural product discovery from microbes, which has been lagging behind the drug discovery era. Therefore, the present review article discusses the various interdisciplinary and cutting-edge techniques to present a concrete strategy that enables the high-throughput screening of novel natural compounds (NCs) from known microbes. Recent bioinformatics methods revealed that the microbial genome contains a huge untapped reservoir of silent biosynthetic gene clusters (BGC). This article describes several methods to identify the microbial strains with hidden mines of silent BGCs. Moreover, antiSMASH 5.0 is a free, accurate, and highly reliable bioinformatics tool discussed in detail to identify silent BGCs in the microbial genome. Further, the latest microbial culture technique, HiTES (high-throughput elicitor screening), has been detailed for the expression of silent BGCs using 500-1000 different growth conditions at a time. Following the expression of silent BGCs, the latest mass spectrometry methods are highlighted to identify the NCs. The recently emerged LAESI-IMS (laser ablation electrospray ionization-imaging mass spectrometry) technique, which enables the rapid identification of novel NCs directly from microtiter plates, is presented in detail. Finally, various trending \'dereplication\' strategies are emphasized to increase the effectiveness of NC screening.
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  • 文章类型: Journal Article
    微生物生态学中稀有生物圈的有影响力的概念强调了类群在低丰度下发生的重要性,但可能在社区和生态系统中发挥关键作用。这里,我们通过基于功能特性的透镜重新聚焦稀有生物圈的概念,并提供一个框架来表征微生物功能稀有度,跨空间或时间的数字稀缺性和特质独特性的组合。我们展示了这种对稀有生物圈的新颖解释,根植于微生物的功能,可以增强我们对微生物群落结构的机械理解。它还揭示了功能不同的微生物,将保护工作引向具有罕见但生态关键功能的类群。
    The influential concept of the rare biosphere in microbial ecology has underscored the importance of taxa occurring at low abundances yet potentially playing key roles in communities and ecosystems. Here, we refocus the concept of rare biosphere through a functional trait-based lens and provide a framework to characterize microbial functional rarity, a combination of numerical scarcity across space or time and trait distinctiveness. We demonstrate how this novel interpretation of the rare biosphere, rooted in microbial functions, can enhance our mechanistic understanding of microbial community structure. It also sheds light on functionally distinct microbes, directing conservation efforts towards taxa harboring rare yet ecologically crucial functions.
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  • 文章类型: Journal Article
    Chili,享誉全球,在各种文化中根深蒂固。遗憾的是,害虫和病原体引起的疾病的发作给辣椒作物造成了重大损失,一些农场经历了完全的产量削减。辣椒种植面临的挑战包括来自黄单胞菌等病原微生物的威胁,镰刀菌,疫霉,黄萎病菌,根瘤菌,Colletotrichium和病毒,除了害虫,如粉虱,螨虫,蓟马,蚜虫,果蝇虽然传统的农业实践经常诉诸化学农药来应对这些挑战,它们的使用对人类健康和环境都构成了巨大的风险。为了应对这个紧迫的问题,这篇综述旨在评估基于微生物的生物防治作为辣椒种植化学农药的生态友好替代品的潜力。生物防治剂如芽孢杆菌属。,木霉属。,和昆虫病原真菌提供了更安全,更环境可持续的化学农药替代品。然而,尽管公认的生物防治剂的潜力,关于它们在控制影响辣椒种植的一系列害虫和病原体方面的功效的研究仍然有限。这篇综述通过评估生物防治剂的效率来解决这一差距,从其他作物系统中进行的现有研究中汲取见解,关于病虫害和病原体管理。值得注意的是,对Scopus出版物的分析显示,2023年只有不到30篇出版物专注于这三种微生物制剂。有趣的是,印度,作为世界上最大的辣椒生产商,有关芽孢杆菌属的出版物数量领先。,木霉属。,辣椒栽培中的昆虫病原真菌。对微生物制剂的进一步研究对于减轻感染和减少对化学农药的依赖以实现可持续的辣椒生产至关重要。
    Chili, renowned globally and deeply ingrained in various cultures. Regrettably, the onset of diseases instigated by pests and pathogens has inflicted substantial losses on chili crops, with some farms experiencing complete production decimation. Challenges confronting chili cultivation include threats from pathogenic microbes like Xanthomonas, Fusarium, Phytophthora, Verticillium, Rhizoctonia, Colletotrichium and Viruses, alongside pests such as whiteflies, mites, thrips, aphids, and fruit flies. While conventional farming practices often resort to chemical pesticides to combat these challenges, their utilization poses substantial risks to both human health and the environment. In response to this pressing issue, this review aims to evaluate the potential of microbe-based biological control as eco-friendly alternatives to chemical pesticides for chili cultivation. Biocontrol agents such as Bacillus spp., Trichoderma spp., and entomopathogenic fungi present safer and more environmentally sustainable alternatives to chemical pesticides. However, despite the recognised potential of biocontrol agents, research on their efficacy in controlling the array of pests and pathogens affecting chili farming remains limited. This review addresses this gap by evaluating the efficiency of biocontrol agents, drawing insights from existing studies conducted in other crop systems, regarding pest and pathogen management. Notably, an analysis of Scopus publications revealed fewer than 30 publications in 2023 focused on these three microbial agents. Intriguingly, India, as the world\'s largest chili producer, leads in the number of publications concerning Bacillus spp., Trichoderma spp., and entomopathogenic fungi in chili cultivation. Further research on microbial agents is imperative to mitigate infections and reduce reliance on chemical pesticides for sustainable chili production.
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  • 文章类型: Journal Article
    尽管有30多年的微生物组和骨骼肌研究,没有对肌肉减少症和微生物组文献进行定量分析.我们的文献计量学研究考察了研究现状,热点,和未来趋势。我们利用文献计量技术在2023年2月27日搜索科学引文索引扩展数据库,使用R中的Bibliometrix包创建显示科学生产和主题类别的地图。使用ScimagoGraphica可视化了国家/地区之间的协作网络地图,而VOSviewer探索了个人和机构之间的协作模式。我们分析了前25个新兴关键词,顶级共同出现的关键词网络,和使用CiteSpace共同出现的关键字集群。共检索到997篇关于肌肉减少症和微生物组的文章,其中633篇论文进行了分析。出版物数量和总引用频率都在不断增加。美国的总引用频率最高,而中国的出版物数量最多。微生物群对肌肉减少症的影响研究处于起步阶段,跨越多个学科,包括营养,微生物学,老年病学,免疫学,内分泌学和新陈代谢,分子生物学,和运动医学。哥本哈根大学对出版物的数量贡献最大(n=16),TibbettM(n=7)和HulverMW(n=7)是顶级作者。发表最多的期刊是“营养素”(n=24)。关键词和聚类分析揭示了微生物和肌少症的新研究热点,比如营养不良,膳食纤维,信号通路,脆弱,和肠道通透性。关于微生物群对肌肉减少症的影响的研究处于起步阶段,跨越多个学科。营养不良,膳食纤维,信号通路,脆弱,和肠道微生物是目前的研究热点。此外,微生物和少肌症研究的可视化图谱分析有助于追踪少肌症和微生物相关研究领域的知识结构,为今后的研究提供方向。
    Despite over 30 years of microbiome and skeletal muscle research, no quantitative analysis of sarcopenia and the microbiome literature had been conducted. Our bibliometric study examined research status, hotspots, and future trends. We utilized bibliometric techniques to search the Science Citation Index Extended Database on February 27, 2023, using the Bibliometrix package in R to create a map displaying scientific production and subject categories. Collaborative network maps between countries/regions were visualized using Scimago Graphica, while VOSviewer explored collaboration modes among individuals and institutions. We analyzed the top 25 emerging keywords, top co-occurring keyword networks, and co-occurring keyword clusters using CiteSpace. A total of 997 articles were retrieved for sarcopenia and microbiome, of which 633 papers were analyzed. Both the number of publications and total citation frequency had been continuously increasing. The United States had the highest total citation frequency, while China had the highest number of publications. Research on the impact of the microbiome on sarcopenia was in its nascent stage and spans multiple disciplines, including nutrition, microbiology, geriatrics, immunology, endocrinology and metabolism, molecular biology, and sports medicine. The University of Copenhagen contributed the most to the number of publications (n=16), with Tibbett M (n=7) and Hulver MW (n=7) among the top authors. The most published journal was \"Nutrients\" (n=24). Analysis of keywords and clusters revealed new research hotspots in microbes and sarcopenia, such as malnutrition, dietary fiber, signaling pathways, frailty, and intestinal permeability. Research on the impact of the microbiome on sarcopenia is in its infancy and spans multiple disciplines. Malnutrition, dietary fiber, signaling pathways, frailty, and intestinal microbes are currently research hotspots. Furthermore, the visual atlas analysis of research on microbes and sarcopenia helps to track the knowledge structure in research fields related to sarcopenia and microbes, providing direction for future research.
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  • 文章类型: Journal Article
    这项研究的主要目的,作为计划保护工作的一部分,是为了揭示本土生物膜的各个方面,这些生物膜与在斯洛文尼亚的石灰石RoanecMithraeum纪念碑上发生的许多恶化症状的形成有关。使用最先进的测序技术,将真菌生物组数据与通过大量光和光谱(FTIR和拉曼)显微镜分析进行的观察相结合,指出了上皮性地衣Gyalectajenensis及其光生物,富含类胡萝卜素的Trentepohliaaurea,作为石灰岩表面鲑鱼色色素变化的起源。此外,纪念碑上主要恶化症状的发展,即,活检,是由代表性的疣科科(Verrucariasp。)与草酸介导的石灰石溶解相结合。苔藓真菌的统治,作为主要的变质剂,在浮雕和周围的石灰石上,此外,在FUNGuild分析中,苔藓化和共生生物组的相对丰度较高。获得的结果不仅提高了人们对这种经常发生但经常被忽视的极端性石头遗产变质剂的认识,而且为开发适用于原位保存类似受影响的石灰石古迹的有效生物防治制剂提供了必要的基础。
    The primary purpose of the study, as part of the planned conservation work, was to uncover all aspects of autochthonous biofilm pertaining to the formation of numerous deterioration symptoms occurring on the limestone Rožanec Mithraeum monument in Slovenia. Using state-of-the-art sequencing technologies combining mycobiome data with observations made via numerous light and spectroscopic (FTIR and Raman) microscopy analyses pointed out to epilithic lichen Gyalecta jenensis and its photobiont, carotenoid-rich Trentepohlia aurea, as the origin of salmon-hued pigmented alterations of limestone surface. Furthermore, the development of the main deterioration symptom on the monument, i.e., biopitting, was instigated by the formation of typical endolithic thalli and ascomata of representative Verrucariaceae family (Verrucaria sp.) in conjunction with the oxalic acid-mediated dissolution of limestone. The domination of lichenized fungi, as the main deterioration agents, both on the relief and surrounding limestone, was additionally supported by the high relative abundance of lichenized and symbiotroph groups in FUNGuild analysis. Obtained results not only upgraded knowledge of this frequently occurring but often overlooked group of extremophilic stone heritage deteriogens but also provided a necessary groundwork for the development of efficient biocontrol formulation applicable in situ for the preservation of similarly affected limestone monuments.
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  • 文章类型: Journal Article
    聚合物产量迅速增加,但是没有大规模的技术可以有效地减轻这些顽固材料的大量积累。一个潜在的解决方案是开发碳中性聚合物生命周期,微生物将植物生物质转化为化学物质,用于合成最终有助于新植物生长的可生物降解材料。实现循环碳生命周期需要整合微生物学知识,生物工程,材料科学,和有机化学,这本身就阻碍了大规模的工业发展。本文综述了常见合成聚合物的生物降解状况,鉴定能够代谢这些顽固材料的新型微生物和酶,并采用工程方法来增强其生物降解途径。还审查了下一代可生物降解聚合物的设计考虑因素,最后,讨论了将木质纤维素生物降解的发现应用于类似顽固合成聚合物的设计和生物降解的机会。
    Polymer production is rapidly increasing, but there are no large-scale technologies available to effectively mitigate the massive accumulation of these recalcitrant materials. One potential solution is the development of a carbon-neutral polymer life cycle, where microorganisms convert plant biomass to chemicals, which are used to synthesize biodegradable materials that ultimately contribute to the growth of new plants. Realizing a circular carbon life cycle requires the integration of knowledge across microbiology, bioengineering, materials science, and organic chemistry, which itself has hindered large-scale industrial advances. This review addresses the biodegradation status of common synthetic polymers, identifying novel microbes and enzymes capable of metabolizing these recalcitrant materials and engineering approaches to enhance their biodegradation pathways. Design considerations for the next generation of biodegradable polymers are also reviewed, and finally, opportunities to apply findings from lignocellulosic biodegradation to the design and biodegradation of similarly recalcitrant synthetic polymers are discussed.
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  • 文章类型: Journal Article
    传粉者被认为是花卉进化的主要驱动力。鲜花也被大量微生物群落定殖,这些微生物群落可以影响植物与其传粉者之间的相互作用。鲜为人知,然而,关于花卉定殖微生物如何影响花卉进化。在这里,我们使用快速循环的芸苔属植物进行了六代实验进化研究,在其中,我们通过因素操纵传粉媒介和花卉微生物的存在,以确定传粉媒介和微生物在驱动花卉进化中如何相互作用。我们测量了六个形态性状的进化,以及植物交配系统和花卉吸引力。六个性状(花数)中只有一个是响应传粉者而进化的,虽然微生物没有驱动任何性状的进化,它们也不与传粉者相互作用,以驱动形态性状的进化。此外,我们没有发现传粉者或微生物会影响传粉者对花朵吸引力的进化的证据。然而,我们发现传粉者和微生物对自主自交进化的相互作用,一种预期响应传粉媒介限制而进化的性状。总的来说,我们发现只有微弱的证据表明微生物介导了花的进化。然而,在我们的实验环境中,弱传粉媒介介导的选择可能限制了我们检测传粉媒介和微生物相互作用效应的能力.我们的结果与以前的(类似的)实验进化研究形成对比,强调了这种实验对漂移和实验人工制品的敏感性。
    Pollinators are thought to be the main drivers of floral evolution. Flowers are also colonized by abundant communities of microbes that can affect the interaction between plants and their pollinators. Very little is known, however, about how flower-colonizing microbes influence floral evolution. Here we performed a six-generation experimental evolution study using fast-cycling Brassica rapa, in which we factorially manipulated the presence of pollinators and flower microbes to determine how pollinators and microbes interact in driving floral evolution. We measured the evolution of six morphological traits, as well as plant mating system and flower attractiveness. Only one of the six traits (flower number) evolved in response to pollinators, while microbes did not drive the evolution of any trait, nor did they interact with pollinators in driving evolution of morphological traits. Moreover, we did not find evidence that pollinators or microbes affected the evolution of flower attractiveness to pollinators. However, we found an interactive effect of pollinators and microbes on the evolution of autonomous selfing, a trait that is expected to evolve in response to pollinator limitation. Overall, we found only weak evidence that microbes mediate floral evolution. However, our ability to detect an interactive effect of pollinators and microbes might have been limited by weak pollinator-mediated selection in our experimental setting. Our results contrast with previous (similar) experimental evolution studies, highlighting the susceptibility of such experiments to drift and to experimental artefacts.
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  • 文章类型: Journal Article
    随着气候变化和全球人口不断增长,对粮食作物生产能力的需求不断增加,农业和作物研究的技术进步将仍然是必要的。尽管在过去的一个世纪中,作物改良的巨大进步促进了产量的大量增加,传统的育种计划缺乏满足未来需求所需的遗传增益率。在过去的十年里,已经开发了新的育种技术和工具来帮助作物改良。一个这样的进步是使用速度育种。速度育种被称为显着减少作物世代之间时间的方法的应用,从而简化育种和研究工作。这些快速一代的进步策略有助于加快作物改良努力的步伐,以维持粮食安全和满足粮食,饲料,以及世界上不断增长的人口对纤维的需求。速度育种可以通过各种技术来实现,包括环境优化,基因组选择,CRISPR-Cas9技术,和表观基因组学工具。这篇综述旨在讨论作物育种技术和技术的这些重大进展,这些技术和技术有可能大大提高植物育种者快速生产重要品种的能力。
    As climate changes and a growing global population continue to escalate the need for greater production capabilities of food crops, technological advances in agricultural and crop research will remain a necessity. While great advances in crop improvement over the past century have contributed to massive increases in yield, classic breeding schemes lack the rate of genetic gain needed to meet future demands. In the past decade, new breeding techniques and tools have been developed to aid in crop improvement. One such advancement is the use of speed breeding. Speed breeding is known as the application of methods that significantly reduce the time between crop generations, thereby streamlining breeding and research efforts. These rapid-generation advancement tactics help to accelerate the pace of crop improvement efforts to sustain food security and meet the food, feed, and fiber demands of the world\'s growing population. Speed breeding may be achieved through a variety of techniques, including environmental optimization, genomic selection, CRISPR-Cas9 technology, and epigenomic tools. This review aims to discuss these prominent advances in crop breeding technologies and techniques that have the potential to greatly improve plant breeders\' ability to rapidly produce vital cultivars.
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  • 文章类型: Journal Article
    由于镉对生态系统和人类健康的毒性影响,工业活动和人为来源不断增加的镉涌入引起了严重的环境问题。这篇综述深入研究了微生物对镉的抗性的复杂机制,揭示了微生物和这种有害重金属之间多方面的相互作用。镉过度暴露会引起严重的健康影响,包括肾癌,粘膜降解,骨密度丢失,和人类肾结石的形成。此外,它的有害影响延伸到动物和植物的新陈代谢。虽然反渗透和离子交换等物理化学方法被用来减轻镉污染,它们的成本和不完整的功效需要替代策略。微生物,特别是细菌和真菌,通过复杂的抗性机制对镉浓度升高表现出显著的复原力。本文阐明了这些微生物用于对抗镉胁迫的巧妙策略,包括金属离子封存,外排泵,和酶解毒途径。生物修复成为解决镉污染的有希望的途径,利用微生物将有毒的镉形式转化为危害较小的衍生物的能力。与传统方法不同,生物修复提供了一个具有成本效益的,环境友好,和有效的方法。这篇综述总结了目前对微生物镉抗性机制的理解,强调其可持续补救战略的潜力。通过解开微生物和镉之间复杂的相互作用,这项研究有助于提高我们对生物修复方法的认识,从而为更安全和更有效的镉缓解措施铺平了道路。
    The escalating cadmium influx from industrial activities and anthropogenic sources has raised serious environmental concerns due to its toxic effects on ecosystems and human health. This review delves into the intricate mechanisms underlying microbial resistance to cadmium, shedding light on the multifaceted interplay between microorganisms and this hazardous heavy metal. Cadmium overexposure elicits severe health repercussions, including renal carcinoma, mucous membrane degradation, bone density loss, and kidney stone formation in humans. Moreover, its deleterious impact extends to animal and plant metabolism. While physico-chemical methods like reverse osmosis and ion exchange are employed to mitigate cadmium contamination, their costliness and incomplete efficacy necessitate alternative strategies. Microbes, particularly bacteria and fungi, exhibit remarkable resilience to elevated cadmium concentrations through intricate resistance mechanisms. This paper elucidates the ingenious strategies employed by these microorganisms to combat cadmium stress, encompassing metal ion sequestration, efflux pumps, and enzymatic detoxification pathways. Bioremediation emerges as a promising avenue for tackling cadmium pollution, leveraging microorganisms\' ability to transform toxic cadmium forms into less hazardous derivatives. Unlike conventional methods, bioremediation offers a cost-effective, environmentally benign, and efficient approach. This review amalgamates the current understanding of microbial cadmium resistance mechanisms, highlighting their potential for sustainable remediation strategies. By unraveling the intricate interactions between microorganisms and cadmium, this study contributes to advancing our knowledge of bioremediation approaches, thereby paving the way for safer and more effective cadmium mitigation practices.
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  • 文章类型: Journal Article
    日常使用的水瓶是人们生活的典型补充,并提供了一种保持水分的实用方法。即使安全和干净的水是首选消费,用来喝水的水瓶或容器从未被认为是清洁的。这里,我们检查了由不锈钢(SS)和聚对苯二甲酸乙二醇酯(PET)组成的水瓶中粘附的微生物种群。从不同的用户收集了总共30个水瓶-15个PET和15个SS。为了识别和量化粘附的微生物种群,收集来自瓶子内表面的微生物拭子,然后在某些生长培养基上培养。总体上,PET的微生物负荷显著高于初始采样时分别为68.8+19.1cfu/ml和35.4+8cfu/ml的SS水瓶(P=0.0027)。我们还评估了各种清洁程序在消除粘附细菌种群中的效率。清洁策略显著降低了微生物负荷(P<0.0001)。观察到的平均负荷为11.2±2.3cfu/ml洗涤后。这项比较研究提供了有关每天使用的SS和PET水瓶中发现的粘附微生物种群的重要新信息,在最后。这一发现强调了对这些瓶子进行常规清洁和保养的必要性,以减少微生物污染的可能性和随之而来的健康风险。
    Water bottles for everyday usage are a typical addition to people\'s life and offer a practical way to stay hydrated. Even though safe and clean water is preferred for consumption, the water bottle or container used to drink water was never considered to be cleaned. Here, we examined the adhering microbial populations in water bottles composed of stainless steel (SS) and polyethylene terephthalate (PET). A total of 30 water bottles-15 PET and 15 SS-were gathered from different users. To identify and quantify the adhering microbial populations, microbial swabs from the inside surface of the bottles were collected and later cultivated on certain growth media. Overall the microbial load of PET is significantly higher than the SS water bottles of 68.8 + 19.1 cfu/ml and 35.4 + 8 cfu/ml respectively at initial sampling (P = 0.0027). We also evaluated the efficiency of various cleaning procedures in eliminating adherent bacteria populations. The cleaning strategy significantly reduced the microbial load (P<0.0001). The mean load observed was 11.2 + 2.3 cfu/ml post-wash. This comparison study offers important new information about the adherent microbial populations found in SS and PET water bottles used every day, in the end. This finding emphasizes the necessity of routine cleaning and upkeep of these bottles to reduce the possibility of microbial contamination and the accompanying health risks.
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