FOC

FOC
  • 文章类型: Journal Article
    背景:在怀孕和分娩期间,除了积极的感觉,女性经历诸如对分娩的恐惧(FoC)并担心其后果,这可能会在怀孕期间对母亲和她的孩子产生负面影响,delivery,和产后。进行这项研究是为了确定产前非药物干预措施对减少FoC的有效性。
    方法:本研究方案注册于PROSPERO(ID:CRD42023468547)。PubMed,WebofScience,科克伦,Scopus,SID(科学信息数据库)和GoogleScholar搜索引擎数据库进行了系统搜索,直到2023年7月27日,没有时间限制,仅限于波斯语和英语研究,以执行此概述。使用等级评估证据的确定性,使用AMSTAR2的方法学质量和使用PRISMA评分的报告质量。对从原始试验中提取的数据进行Meta分析,以评估不同干预措施对降低FoC的效果。使用亚组分析和荟萃回归模型来检查高度异质性,敏感性分析用于消除高偏倚风险研究对研究结果的影响.
    结果:总体而言,概述中包括15项系统综述(SRs),其中9项研究进行了荟萃分析.考虑到方法学质量,这些SR处于低到极低的状态,并且有关于报告质量的相对完整的报告.Meta分析结果表明,心理干预(SMD-2.02,95%CI-2.69至-1.36,16项试验,1057名与会者,I2=95%)和产前教育(SMD-0.88,95%CI-1.16至-0.61,4项试验,432名参与者,I2=72.8%)相对于产前常规护理而言,FoC显着降低,证据的确定性较低。相对于产前常规护理,分心技术导致FoC显着降低,证据具有很高的确定性(SMD-0.75,95%CI-1.18至-0.33,4项试验,329名与会者,I2=69%),但是,相对于证据的确定性非常低的产前常规护理,加强护理不会导致FoC显着下降(SMD-1.14,95%CI-2.85至0.58,3项试验,232名参与者,I2=97%)。
    结论:分心技术可有效降低FoC。关于心理干预和产前教育对减少FoC的影响,研究结果表明,干预措施可能导致FoC的减少。非常不确定的证据表明,加强护理不能有效降低FoC。
    BACKGROUND: During pregnancy and childbirth, alongside positive feelings, women undergo feelings such as fear of childbirth (FoC) and worry about its consequences, which could leave negative effects on the mother and her child during pregnancy, delivery, and postpartum. The study was carried out to determine the effectiveness of prenatal non-pharmacological interventions on reducing the FoC.
    METHODS: The protocol of the study was registered in PROSPERO (ID: CRD42023468547). PubMed, Web of Science, Cochrane, Scopus, SID (Scientific Information Database) and Google Scholar search engine databases were systematically searched until July 27, 2023 with no limitation of time and limited to Persian and English studies in order to perform this overview. Certainty of evidence was assessed using GRADE, methodological quality using AMSTAR 2 and reporting quality using PRISMA score. Meta-analysis was performed on the data extracted from the original trials to evaluate the effect of different interventions on reducing the FoC. Sub-group analysis and meta-regression models were used to examine high heterogeneity, and sensitivity analysis was used to eliminate the effect of high risk of bias studies on the study findings.
    RESULTS: Overall, 15 systematic reviews (SRs) were included in the overview, among which meta-analysis was performed in 9 studies. Considering methodological quality, these SRs were in low to critically low status and had relatively complete reports regarding reporting quality. Meta-analysis findings indicated that psychological interventions (SMD -2.02, 95% CI -2.69 to -1.36, 16 trials, 1057 participants, I2 = 95%) and prenatal educations (SMD -0.88, 95% CI -1.16 to -0.61, 4 trials, 432 participants, I2 = 72.8%) cause a significant reduction in FoC relative to prenatal usual cares with low certainty of evidence. Distraction techniques lead to a significant reduction in FoC relative to prenatal usual care with high certainty of evidence (SMD -0.75, 95% CI -1.18 to -0.33, 4 trials, 329 participants, I2 = 69%), but enhanced cares do not result in a significant decrease FoC relative to prenatal usual care with very low certainty of evidence (SMD -1.14, 95% CI -2.85 to 0.58, 3 trials, 232 participants, I2 = 97%).
    CONCLUSIONS: Distraction techniques are effective in reducing FoC. Regarding the effect of psychological interventions and prenatal educations on the reduction of FoC, the findings indicated that the interventions may result in the reduction of FoC. Very uncertain evidence showed that enhanced cares are not effective in reducing the FoC.
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  • 文章类型: Journal Article
    植物病害对全球人口的粮食安全构成严重威胁。其中一种疾病是枯萎病,这会影响许多植物物种,并导致高达100%的产量损失。镰刀菌病原体在其遗传构成中具有很高的变异性;因此,它已经演变成不同的生理种族,感染遍布世界不同地理区域的不同植物物种。病原体主要影响植物的根部,导致血管束细胞定植和阻断,特别是木质部血管。这种阻断导致萎黄病,血管变色,叶子枯萎,植物的缩短,and,在严重的情况下,植物过早死亡。由于枯萎病病原体的土壤传播性质,农艺和植物保护措施都不能有效降低该病的发病率。因此,枯萎病最具成本效益的管理策略是开发对特定地区流行的真菌枯萎病的特定种族具有抗性的品种。这个策略需要了解病原体,它的疾病周期,和流行病学与气候变化情景。因此,在审查中,我们将讨论枯萎病的致病因素和遗传学,包括开发气候智能型抗枯萎病/抗性作物品种的分子干预措施。总的来说,这项审查将增加我们对促进抗枯萎病流行的认识。
    Plant diseases pose a severe threat to the food security of the global human population. One such disease is Fusarium wilt, which affects many plant species and causes up to 100% yield losses. Fusarium pathogen has high variability in its genetic constitution; therefore, it has evolved into different physiological races to infect different plant species spread across the different geographical regions of the world. The pathogen mainly affects plant roots, leading to colonizing and blocking vascular bundle cells, specifically xylem vessels. This blocking results in chlorosis, vascular discoloration, leaf wilting, shortening of plant, and, in severe cases, premature plant death. Due to the soil-borne nature of the wilt pathogen, neither agronomic nor plant protection measures effectively reduce the incidence of the disease. Therefore, the most cost-effective management strategy for Fusarium wilt is developing varieties resistant to a particular race of the fungus wilt prevalent in a given region. This strategy requires understanding the pathogen, its disease cycle, and epidemiology with climate-changing scenarios. Hence, in the review, we will discuss the pathogenic aspect and genetics of the Fusarium wilt, including molecular interventions for developing climate-smart wilt tolerant/resistant varieties of crops. Overall, this review will add to our knowledge for advancing the breeding of resistance against the wilt pandemic.
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  • 文章类型: Journal Article
    背景:满足住院患者的心理社会护理需求对他们的健康至关重要,recovery,积极的经验。这项研究旨在描述和比较手术住院患者对基本社会心理和整体护理重要性的主观看法。
    方法:2019年9月至2020年4月进行了一项方便样本的描述性研究。来自挪威和丹麦的194名外科住院患者在出院当天回答了围手术期用户参与问卷。该问卷以前是经过面部和内容验证的。问卷评估了患者的社会人口统计学特征和基础护理领域的四个维度:社会心理,关系,Physical,和系统级。这项研究报告了来自社会心理领域的结果。描述性统计,包括频率,百分比,means,和标准偏差用于分析背景信息变量。介绍了参与者对心理社会护理的期望和经验之间的一致性。
    结果:住院患者期望(并有经验)医护人员尊重和有尊严地对待他们,并在整个围手术期护理中参与和告知。关于心理社会护理需求的这些方面的平均评分为72.1-93.8%。患者对心理社会基础护理的主观重要性(SI)的看法与其对护理的感知现实(PR)之间存在一致性。高SI和高PR之间的一致性范围为59.1%至92.2%,低SI和低PR的一致性范围为0至6.6%。SI和PR之间的不一致在5.9%至39.6%之间,主要与PR高于SI有关。我们发现教育水平之间没有关联,性别,逗留时间,年龄,以及患者对心理社会护理需求的期望或体验。
    结论:挪威和丹麦的外科住院患者受到尊重和有尊严的治疗,他们感到参与并了解他们的围手术期护理。重要的是在进一步的研究中纳入患者观点,以避免错过护理和患者偏好与医护人员计划做什么之间的脱节。了解患者的偏好也可能会减少医护人员的压力和工作量。
    BACKGROUND: Meeting inpatients\' psychosocial care needs is essential for their wellbeing, recovery, and positive experiences. This study aimed to describe and compare surgical inpatients\' subjective perceptions of the importance of fundamental psychosocial and overall care received.
    METHODS: A descriptive study with a convenient sample was conducted from September 2019 to April 2020. A total of 194 surgical inpatients from Norway and Denmark answered a perioperative user participation questionnaire on the day of discharge. The questionnaire was previously face- and content validated. The questionnaire assessed patients\' sociodemographic characteristics and four dimensions of fundamental care domains: Psychosocial, Relational, Physical, and System level. This study reports the results from the psychosocial domain. Descriptive statistics including frequencies, percentages, means, and standard deviations were used to analyze background information variables. The congruency between participants\' expectations of and experiences with psychosocial care is presented.
    RESULTS: The inpatients expected (and experienced) the healthcare personnel to treat them with respect and dignity, and to be involved and informed throughout their perioperative care. The average ratings regarding these aspects of psychosocial care needs were 72.1-93.8%. There was congruency between patients\' perceptions of the subjective importance (SI) of psychosocial fundamental care and their perceived reality (PR) of care. Congruency between high SI and high PR ranged from 59.1 to 92.2%, and congruency between low SI and low PR ranged from 0 to 6.6%. Incongruency between SI and PR varied between 5.9 and 39.6% and was mainly related to higher PR than SI. We found no association between education level, sex, length of stay, age, and patient expectations of or experiences with psychosocial care needs.
    CONCLUSIONS: Surgical inpatients in Norway and Denmark experience respectful and dignified treatment, and they feel involved and informed in their perioperative care. It is important to include patient perspectives in further research to avoid missed care and disconnection between what patients prefer and what healthcare personnel plan to do. Understanding patient preferences might also lead to less stress and workload for healthcare personnel.
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  • 文章类型: Journal Article
    本文提出了一种基于转子打滑的新型诊断方法,以正确检测感应电动机驱动(IMD)运行过程中的电流和速度传感器故障。为了提高可靠性,避免由于测量信号质量的影响而导致诊断算法混乱,每个故障类型按照诊断方法定义的优先顺序确定。基于IMD应用磁场定向控制(FOC)技术的特点,一个创新的模型使用测量的电流和参考速度作为输入信号来估计转子滑差电流传感器故障检测。在验证电流信号的反馈质量后,速度传感器故障功能继续,并根据参考速度之间的关系执行,基于滑模方法的速度估计,和测量转子速度。最后,选择估计量来替换错误的测量电流或速度信号。通过使用Matlab-Simulink软件的仿真以及使用额定功率为2.2kW的IMD原型和基于DSC-TMS320F28335的控制系统的实际实验,验证了该方法的可行性。仿真和实验结果证明了该方法的可行性,有效性,以及所提出的诊断技术在检测传感器故障和维持IMD稳定运行方面的可靠性。
    A novel diagnosis method based on the rotor slip is proposed in the paper to correctly detect current and speed sensor failures during the induction motor drive (IMD) operation. In order to enhance reliability and avoid confusion in the diagnosis algorithm due to the influence of measured signal quality, each fault type is determined in a priority order defined by the diagnosis method. Based on the features of the IMD applying the field-oriented control (FOC) technique, an innovative model uses the measured currents and reference speed as the input signals to estimate the rotor slip for the current sensor fault detection. After verifying the quality of the feedback of the current signals, a speed sensor fault function is continued, and performs according to relations among the reference speed, estimated speed based on the sliding mode method, and measured rotor speeds. Finally, the estimated quantities are selected to replace the wrong measured current or speed signals. The feasibility of the proposed approach is verified by simulations using Matlab-Simulink software as well as by practical experiments using an IMD prototype with a rated power of 2.2 kW and a DSC-TMS320F28335-based control system. The obtained simulation and experimental results demonstrated the feasibility, effectiveness, and reliability of the proposed diagnosis technique in detecting sensor failures and maintaining the stable operation of the IMD.
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  • 文章类型: Journal Article
    UNASSIGNED:旨在确定到三级保健医院内分泌诊所就诊的身材矮小儿童骨骼发育不良的频率。
    UNASSIGNED:这项描述性横断面研究是在美国国家儿童健康研究所内分泌学门诊进行的,卡拉奇,为期6个月。共有200名儿童来到NICH的内分泌OPD,年龄小于14岁,身高低于平均值-2.5SD以上(<第3百分位数),和生长失败(<4cm/年)。包括身高在内的全面体检,体重,额枕骨围(FOC),臂跨度,和U/L(上/下)片段比(使用SI单位和SDS)进行。
    未经评估:在200名身材矮小的儿童中,23例(11.5%)儿童诊断为骨骼发育不良,平均年龄为4.7(±3.7)岁.女性身材矮小者中骨骼发育不良的比例很高。在75个女孩中,10名(13.3%)女孩被诊断出骨骼发育不良,而在125个男孩中,13名(10.4%)男孩被诊断出骨骼发育不良,而当我们看到23名骨骼发育不良儿童中骨骼发育不良的比例时,13(56.5%)是男孩,10名(43.5%)是女孩。
    未经批准:在这项研究中,11.5%的身材矮小儿童诊断为骨骼发育不良,平均年龄为4.7岁.结论是该研究所骨骼发育不良的频率相当高。
    UNASSIGNED: To determine the frequency of skeletal dysplasia in children with short stature presenting to the endocrine clinic of a tertiary care hospital.
    UNASSIGNED: This descriptive cross-sectional study was performed in the Outpatient Department of Endocrinology of National Institute of Child Health, Karachi, for 6 months of duration. A total of 200 children coming to endocrine OPD of NICH of either gender, having the age less than 14 years and height more than -2.5 SD below the mean (<3rd percentile), and growth failure (<4 cm/yr) were enrolled. A complete general physical examination including height, weight, fronto-occipital circumference (FOC), arm span, and U/L (upper/lower) segment ratio (using SI units and SDS) was performed.
    UNASSIGNED: Out of 200 children with short stature, skeletal dysplasia was diagnosed in 23 (11.5%) children with the mean age of 4.7 (±3.7) years. Proportion of skeletal dysplasia among short stature was high in females. Out of 75 girls, skeletal dysplasia was diagnosed in 10 (13.3%) girls, while out of 125 boys, skeletal dysplasia was diagnosed in 13 (10.4%) boys, whereas when we see proportion among skeletal dysplasia out of 23 children of skeletal dysplasia, 13 (56.5%) were boys, while 10 (43.5%) were girls.
    UNASSIGNED: In this study, skeletal dysplasia was diagnosed in 11.5% children with short stature with the mean age of 4.7 years. It is concluded that the frequency of skeletal dysplasia in this institute is fairly high.
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  • 文章类型: Journal Article
    背景:尖孢镰刀菌。黄瓜(FOC)是黄瓜枯萎病的病原体,这可能会造成广泛的损害和生产力损失。葫芦科(葫芦科)通常被用作黄瓜的砧木,因为它对枯萎病具有优异的抗性。我们之前的研究发现,紫叶菜具有较高的FOC抗性,其潜在机制尚不清楚。
    结果:在RNA-Seq和同量异位标签的基础上进行转录组和蛋白质组分析,用于相对和绝对定量技术,以探索南瓜对尖孢镰刀菌fsp。黄瓜感染。比较分析表明,在FOC接种后第2d和第4d,1850个基因和356个蛋白质种类受到差异调节。然而,相关分析显示,在第2天和第4天接种FOC后,只有11个和39个基因在转录组和蛋白质组水平上都有差异调控,分别。FOC接种后,植物激素信号转导,转录因子被刺激,而蜡的生物合成和光合作用受到抑制。氧化-氧化还原蛋白合成的增加涉及对FOC的抗性。
    结论:这项研究首次揭示了直叶直叶在转录组和蛋白质组水平上对FOC感染的反应,并表明FOC感染激活植物激素信号和转录因子,同时抑制蜡的生物合成和光合作用。氧化-氧化还原蛋白的积累也在紫叶菜对FOC的抗性中起重要作用。结果提供了有关紫花苜蓿叶片对FOC抗性过程的新信息,并将有助于具有FOC抗性的黄瓜砧木的育种。
    BACKGROUND: Fusarium oxysporum f. sp. cucumerinum (FOC) is the causal agent of cucumber Fusarium wilt, which can cause extensive damages and productivity losses. Cucurbita ficifolia Bouché (Cucurbitaceae) is usually used as rootstock for cucumber because of its excellent resistance to Fusarium wilt. Our previous study found that C.ficifolia has high FOC resistance, the underlying mechanism of which is unclear.
    RESULTS: Transcriptome and proteome profiling was performed on the basis of RNA-Seq and isobaric tag for relative and absolute quantitation technology to explore the molecular mechanisms of the response of Cucurbita ficifolia Bouché to Fusarium oxysporum f. sp. cucumerium infection. Comparative analyses revealed that 1850 genes and 356 protein species were differentially regulated at 2d and 4d after FOC inoculation. However, correlation analysis revealed that only 11 and 39 genes were differentially regulated at both the transcriptome and proteome levels after FOC inoculation at 2d and 4d, respectively. After FOC inoculation, plant hormones signal transduction, transcription factors were stimulated, whereas wax biosynthesis and photosynthesis were suppressed. Increased synthesis of oxidative-redox proteins is involved in resistance to FOC.
    CONCLUSIONS: This study is the first to reveal the response of C. ficifolia leaf to FOC infection at the transcriptome and proteome levels, and to show that FOC infection activates plant hormone signaling and transcription factors while suppressing wax biosynthesis and photosynthesis. The accumulation of oxidative-redox proteins also plays an important role in the resistance of C. ficifolia to FOC. Results provide new information regarding the processes of C. ficifolia leaf resistance to FOC and will contribute to the breeding of cucumber rootstock with FOC resistance.
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  • 文章类型: Journal Article
    背景:分娩期间的分娩恐惧和干预措施可能与非孕妇对分娩的心态和知识有关。非孕妇在第一次分娩之前可能特别有分娩恐惧的风险。
    方法:本研究检查了出生相关心态的表达和关联,知识,316名年轻人中的恐惧,没有分娩经验的非孕妇。他们参加了一项横断面在线研究,并完成了怀孕前的分娩恐惧,心态和出生问卷,和出生知识测试。
    结果:大多数女性(44%)具有自然的心态和较低的恐惧感,29%的人有医疗心态和低恐惧,8%的自然心态和更高的恐惧,19%的医疗心态和更高的恐惧。四组之间的知识没有差异。关于开始出生的迹象,出现了一些知识空白,和非医学方法来缓解疼痛。来自具有自然心态和低分娩恐惧的女性,更高比例(13%)的人已经看过分娩,与其他组相比。自然心态与较低的分娩恐惧有关,而知识独立于分娩恐惧。较高的知识与自然心态相关较低。心态和分娩恐惧与年龄和教育程度无关。
    结论:妇科医生,助产士和其他卫生专业人员可能会在他们的非怀孕患者中意识到分娩是自然事件,并在他们的咨询中考虑与出生有关的恐惧,重点关注女性的自我效能感和非医学方法来缓解疼痛。
    BACKGROUND: Childbirth fear and interventions during childbirth might be related to the mindset and knowledge non-pregnant women have regarding childbirth. Non-pregnant women before their first birth experience may be particularly at risk for childbirth fear.
    METHODS: The present study examined the expressions and associations of birth-related mindset, knowledge, and fear among 316 young, non-pregnant women without birth experience. They participated in a cross-sectional online study and completed the Childbirth Fear Prior to Pregnancy, the Mindset and Birth Questionnaire, and a birth knowledge test.
    RESULTS: Most women (44%) had a natural mindset and low fear, 29% had a medical mindset and low fear, 8% natural mindset and higher fear, and 19% medical mindset and higher fear. There were no differences in knowledge between the four groups. Some gaps in knowledge appeared concerning signs of beginning birth, and non-medical approaches to pain relief. From women with natural mindset and low childbirth fear, a higher percentage (13%) has already watched a birth, as compared to the other groups. Natural mindset was associated with lower childbirth fear, whereas knowledge was independent from childbirth fear. Higher knowledge was low associated with natural mindset. Mindset and childbirth fear were independent from age and education degree.
    CONCLUSIONS: Gynecologists, midwifes and other health professionals may develop an awareness for birth as a natural event in their non-pregnant patients, and take birth-related fear into account in their counseling, with focus on women\'s self-efficacy and non-medical approaches to pain relief.
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  • 文章类型: Journal Article
    尖孢镰刀菌引起的枯萎病。立方体(Foc),是感染香蕉的最致命的土壤传播真菌病原体。Foc种族1(R1)和4(R4)是影响印度经济上重要的卡文迪许香蕉组的两个最主要种族。在我们的野外调查中,总共从三个致病种族中分离出七个营养相容性组(VCGs),发现它们对cv具有很强的毒力。GrandeNaine.根据比较基因组分析,这些印度FocVCGs在基因组组织和效应基因谱上是多样的。因此,使用目前可用的分子标记获得了假阳性结果。在这种情况下,该研究已开始开发基于PCR的分子标记,以明确鉴定印度FocR1和R4分离株。FocR1的全基因组序列(GCA_011316005.3),FocTR4(GCA_014282265.3),和FocSTR4(GCA_016802205.1),以及Foc(ASM799451v1)和尖孢酵母f.sp.的参考基因组。lycopersici(Fol;ASM14995v2),对齐以识别Foc种族之间的独特可变区域。使用推定的染色体和预测的基因比较,确定了种族特异性独特的Foc毒力基因。推定的谱系特异性鉴定的基因编码木质部(SIX)中分泌的产物,这些产物可能是香蕉疾病发展所必需的。进行了计算机模拟分析,并从序列与其他种族不同的区域设计引物,以开发FocR1,R4,TR4和STR4的特异性标记。这些种族特异性标记允许在表征的高毒力Foc分离株中进行靶标扩增,并且没有显示出任何与其他Foc种族的交叉扩增,VCG或香蕉病原体,镰刀菌属物种,和非致病性尖孢镰刀菌分离株。研究表明,为印度的所有三个Foc种族开发的分子标记可以检测到植物中的病原体,并且可以检测到高达0.025pgµL-1的DNA水平。因此,这项研究中开发的标记是新颖的,可能对准确诊断和检测印度Foc种族有用,这对于有效治疗该疾病很重要。
    Fusarium wilt caused by Fusarium oxysporum f. sp. cubense (Foc), is the most lethal soil-borne fungal pathogen infecting bananas. Foc race 1 (R1) and 4 (R4) are the two most predominant races affecting the economically important Cavendish group of bananas in India. A total of seven vegetative compatibility groups (VCGs) from three pathogenic races were isolated during our field survey and were found to be highly virulent towards cv. Grande Naine. According to comparative genome analyses, these Indian Foc VCGs were diverse in genomic organization and effector gene profiles. As a result, false-positive results were obtained with currently available molecular markers. In this context, the study has been initiated to develop PCR-based molecular markers for the unambiguous identification of Indian Foc R1 and R4 isolates. Whole-genome sequences of Foc R1 (GCA_011316005.3), Foc TR4 (GCA_014282265.3), and Foc STR4 (GCA_016802205.1), as well as the reference genomes of Foc (ASM799451v1) and F. oxysporum f. sp. lycopersici (Fol; ASM14995v2), were aligned to identify unique variable regions among the Foc races. Using putative chromosome and predicted gene comparison, race-specific unique Foc virulence genes were identified. The putative lineage-specific identified genes encoding products secreted in xylem (SIX) that may be necessary for disease development in the banana. An in silico analysis was performed and primers were designed from a region where sequences were dissimilar with other races to develop a specific marker for Foc R1, R4, TR4, and STR4. These race-specific markers allowed target amplification in the characterized highly virulent Foc isolates, and did not show any cross-amplification to any other Foc races, VCGs or banana pathogens, Fusarium species, and non-pathogenic Fusarium oxysporum isolates. The study demonstrated that the molecular markers developed for all the three Foc races of India could detect the pathogen in planta and up to 0.025 pg µL-1 DNA levels. Thus, the markers developed in this study are novel and could potentially be useful for the accurate diagnosis and detection of the Indian Foc races which are important for the effective management of the disease.
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  • 文章类型: Journal Article
    香蕉(Musaspp。),在世界许多地方,主要的现金和主要水果作物,被枯萎病感染,这导致高达100%的产量损失,并造成社会后果。尖孢镰刀菌引起的巴拿马枯萎病的第1场和第2场。古巴(Foc)在世界范围内普遍存在,并严重影响许多传统品种。Foc热带种族4(FocTR4)的威胁在非洲各县迫在眉睫。然而,它在印度的发病率仅限于比哈尔邦(Katihar和Purnea),北方邦(Faizabad),中央邦(Burhanpur)和古吉拉特邦(Surat)。通过使用杀真菌剂管理Foc种族通常不是可持续的选择,因为疾病传播迅速,并且它们负面地改变了有益的外生植物和内生菌的生物多样性。此外,多菌灵/曲氟菌酯戊唑醇浸透的土壤也不能有效抑制香蕉的枯萎病。正在通过常规和高级育种方法来提高易感品种对枯萎病的抗性。然而,用Pisanglilly和YKM5等抗性基因型的细菌内生菌对香蕉内圈进行工程将诱导针对Foc的免疫反应,不管种族。不同香蕉品种中细菌内微生物组的组成主要是门变形杆菌,拟杆菌和放线菌。拮抗Foc的主要内生菌属为芽孢杆菌,短芽孢杆菌,拟芽孢杆菌,Virgibacillus,葡萄球菌,纤维单胞菌,微球菌,棒状杆菌,Kocuriaspp.,Paracocussp.,不动杆菌属。农杆菌,动脉瘤杆菌,肠杆菌,克雷伯菌属,溶血芽孢杆菌,微球菌,根瘤菌,芽孢杆菌,泛菌,假单胞菌,Serratia,微细菌,红球菌,窄食单胞菌,假黄单胞菌,Luteimonas,Dokdonella,红杆菌属,Luteibacter,类固醇,Nevskia,水痘,立克次体,军团菌,Tatlockia和链霉菌。这些内生细菌通过溶解磷酸盐促进香蕉幼苗的生长,生产吲哚乙酸和铁载体。在组织培养克隆的硬化阶段应用香蕉内生菌可作为对抗Foc的屏障。到目前为止,内生菌的MAMP分子,包括鞭毛蛋白,脂糖,肽聚糖,延伸率,冷休克蛋白和发夹诱导微生物相关分子模式(MAMP)触发的免疫以抑制植物病原体。通过MAPK和包括WRKY和MYC的转录因子诱导与ISR和SAR相关的事件级联。正在进行研究,以利用拮抗细菌内生菌对Foc分离株的潜力,并了解MAMP触发的免疫和代谢组学串扰调节抗性。这篇综述探讨了利用潜在的细菌内微生物群来对抗Foc的可能性,并开发具有细菌内生菌的纳米制剂,以提高对Foc感染香蕉的致命致病种族的功效。
    背景:在线版本包含补充材料,可在10.1007/s13205-021-02833-5获得。
    Banana (Musa spp.), a major cash and staple fruit crop in many parts of the world, is infected by Fusarium wilt, which contributes up to 100% yield loss and causes social consequences. Race 1 and race 2 of Panama wilt caused by Fusarium oxysporum f. sp. cubense (Foc) are prevalent worldwide and seriously affect many traditional varieties. The threat of Foc tropical race 4 (Foc TR4) is looming large in African counties. However, its incidence in India has been confined to Bihar (Katihar and Purnea), Uttar Pradesh (Faizabad), Madhya Pradesh (Burhanpur) and Gujarat (Surat). Management of Foc races by employing fungicides is often not a sustainable option as the disease spread is rapid and they negatively alter the biodiversity of beneficial ectophytes and endophytes. Besides, soil drenching with carbendazim/trifloxystrobin + tebuconazole is also not effective in suppressing the Fusarium wilt of banana. Improvement of resistance to Fusarium wilt in susceptible cultivars is being addressed through both conventional and advanced breeding approaches. However, engineering of banana endosphere with bacterial endophytes from resistant genotypes like Pisang lilly and YKM5 will induce the immune response against Foc, irrespective of races. The composition of the bacterial endomicrobiome in different banana cultivars is dominated by the phyla Proteobacteria, Bacteroidetes and Actinobacteria. The major bacterial endophytic genera antagonistic to Foc are Bacillus, Brevibacillus, Paenibacillus, Virgibacillus, Staphylococcus, Cellulomonas, Micrococcus, Corynebacterium, Kocuria spp., Paracoccus sp., Acinetobacter spp. Agrobacterium, Aneurinibacillus, Enterobacter, Klebsiella, Lysinibacillus, Micrococcus, Rhizobium, Sporolactobacillus, Pantoea, Pseudomonas, Serratia, Microbacterium, Rhodococcus, Stenotrophomonas, Pseudoxanthomonas, Luteimonas, Dokdonella, Rhodanobacter, Luteibacter, Steroidobacter, Nevskia, Aquicella, Rickettsiella, Legionella, Tatlockia and Streptomyces. These bacterial endophytes promote the growth of banana plantlets by solubilising phosphate, producing indole acetic acid and siderophores. Application of banana endophytes during the hardening phase of tissue-cultured clones serves as a shield against Foc. Hitherto, MAMP molecules of endophytes including flagellin, liposaccharides, peptidoglycans, elongation factor, cold shock proteins and hairpins induce microbe-associated molecular pattern (MAMP)-triggered immunity to suppress plant pathogens. The cascade of events associated with ISR and SAR is induced through MAPK and transcription factors including WRKY and MYC. Studies are underway to exploit the potential of antagonistic bacterial endophytes against Foc isolates and to develop an understanding of the MAMP-triggered immunity and metabolomics cross talk modulating resistance. This review explores the possibility of harnessing the potential bacterial endomicrobiome against Foc and developing nanoformulations with bacterial endophytes for increased efficacy against lethal pathogenic races of Foc infecting banana.
    BACKGROUND: The online version contains supplementary material available at 10.1007/s13205-021-02833-5.
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  • 文章类型: Journal Article
    背景:随着世界香蕉枯萎病的爆发,必须解开这种疾病传播的所有可能过程。香蕉象鼻虫与香蕉植物的寄主-害虫相互作用使这种昆虫成为重要的潜在媒介。这项研究,在受控条件下进行,探讨了香蕉象鼻虫和尖孢镰刀菌之间的相互作用。cubense种族1(Foc),专注于活真菌繁殖体的外部和内部运输。
    结果:在昆虫的外部盖和消化道中非常迅速地检测到Foc的活菌接种物,即在与受感染的假茎接触后5分钟研究的最低时间。与接种物源接触1小时后发生最大接种物采集。外部接种物高于消化道中存在的接种物,但是外部和内部接种物具有相同的动力学。在接触感染源之后,外部和内部接种物在50小时内呈指数下降,但是象鼻虫感染了很长时间,只要2或3天,这将是足够的接种物扩散。在粪便中也检测到有活力的接种物。将分离出的Foc菌株接种到GrosMichel品种的香蕉植物上时具有致病性,但在卡文迪许香蕉植物上没有引起任何症状。
    结论:这些结果表明,Foc的感染结构在消化系统和香蕉象鼻虫的排泄物中保持外部活力。这种排泄物能够制造GrosMichel品种的健康香蕉植物。©2021年化学工业学会。
    BACKGROUND: With the undergoing world outbreak of Fusarium wilt of bananas, it is essential to unravel all the possible process of dissemination of this disease. The host-pest interactions of the banana weevil with banana plants make this insect an important potential vector. This study, carried out in controlled conditions, explores the interaction between the banana weevil and Fusarium oxysporum f.sp. cubense race 1 (Foc), with a focus on the external and internal transport of viable fungal propagules.
    RESULTS: Viable inoculum of Foc was detected very rapidly on external teguments and in the digestive tract of the insect, i.e. at the lowest time studied of 5 min after contact with infected pseudostems. Maximal inoculum acquisition occurred after 1 h contact with an inoculum source. External inoculum was higher than the inoculum present in the digestive tract, but external and internal inoculum had the same dynamics. After a contact of an infected source, external and internal inoculum decreased exponentially within 50 h, but weevils remained infested for a long time, as long as 2 or 3 days that would be enough for inoculum dispersal. Viable inoculum was also detected in feces. Foc strains isolated were pathogenic when inoculated to banana plants of the Gros Michel variety but did not provoke any symptom on Cavendish banana plants.
    CONCLUSIONS: These results demonstrate that the infective structures of Foc remain externally viable in the digestive system and the excreta of the banana weevil. Such excreta are capable of making healthy banana plants of the Gros Michel variety. © 2021 Society of Chemical Industry.
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