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Journal of plant science and phytopathology最新文献

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Mitigation and adaptation to climate change of plant pathogens 缓解和适应气候变化的植物病原体
Pub Date : 2022-09-07 DOI: 10.29328/journal.jpsp.1001082
Lops Francesco
The literature shows that different pathosystems respond in different ways to climate change. Changing climate can affect plant-pathogen interactions by altering the life cycle of pathogens, expression of host resistance, disease epidemiology and severity of outbreaks, development of new races, virulence and distribution of geographical area of pathogens. Bebber, et al. [6] made a comprehensive review of reported latitudinal trends of the irst reports of plant pests (in the broad sense) since 1960. In most cases there were movements poleward for arthropod pests, fungi, oomycetes and bacteria; exceptions seem to be nematodes and viruses, which appear to have moved to the equator. In the case of viruses, the trend seems to be reversed. Many viruses are vectored by insects in the Hemiptera and Thysanoptera where movement is most de initely poleward and one interpretation of these trends is that the movement of viruses lags behind that of their vectors [7].
文献表明,不同的病理系统对气候变化的反应方式不同。气候变化可以通过改变病原体的生命周期、宿主抗性的表达、疾病流行病学和疫情的严重程度、新种族的发展、毒力和病原体地理区域的分布来影响植物与病原体的相互作用。Bebber等人[6]对1960年以来首次植物害虫报告(广义)的纬度趋势进行了全面回顾。在大多数情况下,节肢动物害虫、真菌、卵菌和细菌都会向极地移动;线虫和病毒似乎是例外,它们似乎已经转移到了赤道。就病毒而言,这一趋势似乎发生了逆转。许多病毒是由半翅目和Thysanoptera的昆虫传播的,在半翅目和胸腺目中,昆虫的运动最明显地是向极地的,对这些趋势的一种解释是,病毒的运动落后于其媒介[7]。
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引用次数: 0
Genetic variability in the susceptibility of immature peach fruit to Monilinia laxa is associated with surface conductance but not stomatal density 未成熟桃果实对松弛Monilinia laxa易感性的遗传变异与表面电导有关,而与气孔密度无关
Pub Date : 2022-08-25 DOI: 10.29328/journal.jpsp.1001081
Lino Leandro Oliveira, Confolent Carole, Signoret Véronique, Génard Michel, Quilot-Turion Bénédicte
Monilinia laxa is a fungus that causes brown rot in stone fruit. Immature green fruits in the first stage of fruit development (stage I) are generally susceptible. To investigate the relationship between the physical characteristics of immature fruit and susceptibility to M. laxa, we characterized the progeny, derived from a clone of wild peach (Prunus davidiana) crossed with two commercial nectarines (Prunus persica) varieties, through laboratory infection, transpiration monitoring and stomata counting. Two types of fruit infections were observed - ‘classic’ brown rot and ‘clear spot’ symptoms - which have not previously been described in the literature. The number and density of stomata did not explain the observed variability of infection in the progeny. However, surface conductance was positively correlated with infection level. This study provides experimental evidence partially linking physical fruit characteristics to brown rot infection at the immature fruit stage. The role of delayed cuticle deposition in susceptibility to brown rot of immature fruit is discussed.
念珠菌是一种在核果中引起褐腐病的真菌。未成熟的绿色果实在果实发育的第一阶段(第一阶段)通常是易感的。为研究野桃(Prunus davidiana)无性系与2个商品桃(Prunus persica)品种杂交的未成熟果实物理性状与M. laxa易感性的关系,采用室内侵染、蒸腾监测和气孔计数等方法对其后代进行了鉴定。观察到两种类型的水果感染——“经典”褐腐病和“明显斑点”症状——这在以前的文献中没有描述过。气孔的数量和密度并不能解释在后代中观察到的感染变异性。表面电导率与感染程度呈正相关。本研究为未成熟果实期褐腐病侵染与果实物理性状的部分联系提供了实验证据。讨论了角质层延迟沉积在未成熟果实褐腐病易感性中的作用。
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引用次数: 2
Sanitary update on wheat in Argentina 阿根廷小麦卫生最新情况
Pub Date : 2022-08-03 DOI: 10.29328/journal.jpsp.1001080
Alberione Enrique Javier
The wheat production (Triticum aestivum L.) in Argentina is the third in importance after soybeans and corn (source: BCR).
阿根廷的小麦产量(Triticum aestivum L.)位居第三,仅次于大豆和玉米(来源:BCR)。
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引用次数: 0
Invasive and native woody plant encroachment: Definitions and debates 入侵与本地木本植物侵占:定义与争论
Pub Date : 2022-07-28 DOI: 10.29328/journal.jpsp.1001079
Soubry Irini, Guo Xulin
In this short opinion piece, we discuss the appropriate use of the term ‘invasion’ for woody plant expansion and refer to the various ways in which the term is being used in the literature. We point out the present confusion and make suggestions for the use of a more appropriate term (i.e., ‘woody plant encroachment’). We continue with an overview of the various definitions of ‘woody plant encroachment in the literature, we mention associated alternative terms, and we explain the circumstances in which each of these are used. With this piece, we hope to provide more clarity on the use of correct terminology related to woody plant expansion research.
在这篇简短的评论文章中,我们讨论了木本植物扩张中“入侵”一词的适当使用,并参考了该术语在文献中使用的各种方式。我们指出了目前的混淆,并建议使用一个更合适的术语(即“木本植物侵占”)。我们继续概述文献中“木本植物侵占”的各种定义,我们提到了相关的替代术语,并解释了每种术语使用的情况。通过这篇文章,我们希望为木本植物扩展研究的正确术语的使用提供更多的清晰度。
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引用次数: 1
Genetic variability, divergence, and path coefficient analysis of yield and yield related traits of Durum wheat (Triticum turgidum l. var. Durum) genotypes at Jamma district, south wollo zone, amhara region, Ethiopia 埃塞俄比亚阿姆哈拉地区南wollo区Jamma地区Durum小麦(Triticum turgidum l. var. Durum)基因型产量及相关性状的遗传变异、差异及通径分析
Pub Date : 2022-07-04 DOI: 10.29328/journal.jpsp.1001078
Tefera Haile
Durum wheat (Triticum turgidum L. var. durum) is a member of the Poaceae family and tetraploid (genomes of AABB) with 28 chromosomes (2n=4x=28). Narrow genetic variability was a problem to develop genotypes with better adaptation to different agro-ecologies. Therefore, the objective of this study was to investigate the genetic variability, divergence, and path coefficient analysis of durum wheat genotypes by using morphological traits and identifying essential yield-related traits of durum wheat, and to identify promising candidate genotypes to be used in future durum wheat breeding program. The study was carried out on 81 genotypes and the experiment was laid out in a triple lattice design with an arrangement of 9 x 9 x 3 treatment, which made 243 experimental units. Results obtained on genetic variability, path coefficient, and genetic divergent analysis among yield-related traits are presented here under the present study. Generally, the present study revealed the existence of significant genetic variability among the tested genotypes for different traits helpful for direct and indirect selection. This study recommended that the potential durum wheat genotypes 214552, 208150, 238516, 5645, Mekuye, 236984, 7960, 7152, 231599, and 208242 could be used for durum wheat breeding programs for yield and yield component traits improvement under similar agro-ecologies.
硬粒小麦(Triticum turgidum L. var. Durum)是禾科植物,具有28条染色体(2n=4x=28)的四倍体(AABB基因组)。遗传变异性狭窄是开发适应不同农业生态环境的基因型的一个问题。因此,本研究旨在通过硬粒小麦的形态性状和产量相关性状的鉴定,研究硬粒小麦基因型的遗传变异、差异和通径分析,并为今后硬粒小麦育种提供有前景的候选基因型。试验采用3格设计,9 × 9 × 3处理,共243个实验单元。本文介绍了产量相关性状的遗传变异、通径系数和遗传分歧分析结果。总的来说,本研究揭示了不同性状在被测基因型之间存在显著的遗传变异,有助于直接选择和间接选择。建议将214552、208150、238516、5645、麦酷叶、236984、7960、7152、231599和208242这5个硬粒小麦潜在基因型用于类似农业生态条件下的硬粒小麦产量和产量组成性状改良育种计划。
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引用次数: 1
Synthesis and characterization of CdS/CeO2 Nanocomposite with improved visible-light photocatalytic degradation of methyl orange dye 改进可见光催化降解甲基橙染料的CdS/CeO2纳米复合材料的合成与表征
Pub Date : 2022-06-20 DOI: 10.29328/journal.jpsp.1001077
Mekonnen Tigabu Bekele
Different types of photocatalysts in single and binary systems in different molar ratios were synthesized by the co-precipitation method. Crystal structure, surface area, morphology, bandgap energy, functional groups, and optical properties of the as-synthesized photocatalysts were characterized by using XRD, BET, SEM-EDX, UV/Vis, FTIR, and PL instruments, respectively. Photocatalytic activities of the single and binary composite were evaluated by using an aqueous solution of model pollutant MeO. Photocatalytic activities of binary CdS/CeO2 (1:1) nanocomposite were found to be higher than those of single counterparts. The degradation efficiencies of the binary system were found to be 53.73%. The reusability of the binary photocatalyst was tested and only about 33% decrement was observed after four successive runs. The degradation of MeO dye follows the pseudo-first-order kinetics for the entire as-synthesized nanocomposite. The results also suggest that in the CdS/CeO2 (1:1) composite the photoinduced electrons and holes can be effectively separated.
采用共沉淀法合成了不同摩尔比的单体系和二元体系中不同类型的光催化剂。采用XRD、BET、SEM-EDX、UV/Vis、FTIR和PL等仪器对合成的光催化剂的晶体结构、比表面积、形貌、带隙能、官能团和光学性质进行了表征。用模拟污染物MeO水溶液评价了单、二元复合材料的光催化活性。双CdS/CeO2(1:1)纳米复合材料的光催化活性高于单CdS/CeO2纳米复合材料。二元体系的降解效率为53.73%。测试了二元光催化剂的可重复使用性,连续运行四次后,仅观察到约33%的衰减。MeO染料的降解遵循整个合成纳米复合材料的准一级动力学。结果还表明,在CdS/CeO2(1:1)复合材料中,光致电子和空穴可以有效地分离。
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引用次数: 1
The use of Bacillus thuringiensis to control plant-parasitic nematodes 苏云金芽孢杆菌防治植物寄生线虫的研究
Pub Date : 2022-06-20 DOI: 10.29328/journal.jpsp.1001076
B. Yolanda, Galeano Magda, Baños-Salmeron Mireya, Escriche Baltasar
Plant-parasitic nematodes are ubiquitous in nature and cause large losses in agriculture. The current concerns regarding the use of chemical pesticides have increased the interest in new control alternatives. One of these is the one based on Bacillus thuringiensis (Bt). These Gram-positive bacteria have the ability to synthesize pesticide proteins during sporulation. Some of these proteins have nematicidal properties. Studies have shown that preparations of certain strains of Bt can prevent or slow down the infestation of phytonematodes. The expression of some Bt nematicidal genes in transgenic plants has also demonstrated their effectiveness. Bt is nowadays an effective ecological alternative for controlling plant-parasitic nematodes.
植物寄生线虫在自然界中普遍存在,在农业中造成巨大损失。目前对使用化学农药的担忧增加了人们对新的控制替代品的兴趣。其中一种是基于苏云金芽孢杆菌(Bt)的。这些革兰氏阳性菌具有在孢子形成过程中合成农药蛋白的能力。其中一些蛋白质具有杀线虫特性。研究表明,某些Bt菌株的制剂可以预防或减缓植物线虫的侵扰。一些Bt杀线虫基因在转基因植物中的表达也证明了它们的有效性。Bt是目前控制植物寄生线虫的有效生态替代品。
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引用次数: 0
Chemical composition of olive stems essential oil from Ethiopia 埃塞俄比亚橄榄茎精油的化学成分
Pub Date : 2022-06-14 DOI: 10.29328/journal.jpsp.1001075
Asfaw Melese Damtew
In this article, the chemical compounds, antimicrobial and antioxidant activity of the volatile oil from leaves of Olea Europaea L. cultivar from Ethiopia has been studied. The essential oil was provided with a dry distillation apparatus and analyzed by GC-MS/FID. This analysis leads to the detection of 128 compounds representing 89.4% of the total oil. The major constituents were methyl ester hexadecanoic acid (4.10%), 2,4-dimethoxyphenolAa (4.05%), 2-methoxy-phenol (3.25%), 3,5-dimethoxy-4-hydroxytoluene (3.20%), 2-methoxy-5-methyl phenol (3.19%), 1,2,3-trimethoxy-5-methyl benzene (2.93%), 2-methoxy-4-vinyl phenol (2.70%), 2-hydroxy-3-methyl-2-cyclopenten-1-one (2.60%), trans-Isoeugenol (2.45%) and (E) -2,6-dimethoxy-4- (prop-1-en-1-yl) phenol (2.25%). The composition of essential oils was dominated by phenolic compounds.
本文对埃塞俄比亚木犀(Olea Europaea L.)叶片挥发油的化学成分、抗菌活性和抗氧化活性进行了研究。用干馏设备提供精油,并通过GC-MS/FID进行分析。该分析导致检测到128种化合物,占总油的89.4%。主要成分为甲酯十六烷酸(4.10%)、2,4-二甲氧基苯酚Aa(4.05%)、2-甲氧基-苯酚(3.25%)、3,5-二甲氧基-4-羟基甲苯(3.20%)、2-乙氧基-5-甲基苯酚(3.19%)、1,2,3-三甲氧基-5-甲苯(2.93%)、2-甲基-4-乙烯基苯酚(2.70%)、,反式异丁香酚(2.45%)和(E)-2,6-二甲氧基-4-(丙-1-烯-1-基)苯酚(2.25%)。精油成分以酚类化合物为主。
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引用次数: 0
Plant molluscicide based on Smolevka white (Silene Latifolia) as prevention of pastoral helminthiasis of animals 基于Smolevka white(Silene Latifolia)的植物灭螺剂预防动物牧蠕虫病
Pub Date : 2022-06-09 DOI: 10.29328/journal.jpsp.1001074
Postevoy An, Andreyanov On
Soft-bodied is the intermediate host of helminthiases, in the body of which several development stages of larval forms of helminths occur. There is the highest population density of mollusks in the areas of ruminant grazing, which leads to mass infection of animals with trematodes. To destroy the intermediate host of helminths in agricultural production, molluscicidal remedies of synthetic and plant origin are used. The work aimed to determine the molluscicidal effectiveness of a plant remedy based on Silene Latifolia in conditions of natural pastures. The material for work was the green mass of the plant S. Latifolia obtained in the warm season from roots, leaves, stems, flowers, and seeds. By grinding this plant, a powder with a particle size of 1-3 mm was obtained. Then, the powder was extracted with ethyl alcohol. The obtained product (concentrate) was an amorphous gel-like mass of dark green color with a specific smell and well soluble in water. Fieldwork in natural pastures was carried out on 5 biotopes with an area of 4-25 m2. Three species of gastropods were recorded from freshwater mollusks in the biotopes: Planorbis planorbis, Planorbarius corneus, Physa fontinalis, Lymnaea truncatula, and L. palustris. The results of experiments conducted in the conditions of pastures indicate a high molluscicidal activity of the studied plant agent on pond fish, intermediate hosts of trematodes pathogens. The effectiveness of the developed molluscicide on gastropods, when treated with a working solution (10.0 g/l) is from 98.1 to 100%.
软体是蠕虫的中间寄主,蠕虫幼虫的几个发育阶段都发生在软体体内。反刍动物放牧区的软体动物种群密度最高,导致动物集体感染吸虫。在农业生产中,为了消灭蠕虫的中间寄主,通常采用人工合成和植物源性的杀螺剂。本研究旨在确定天然牧草条件下以香叶为基础的植物制剂的杀螺效果。工作的材料是在温暖的季节从根、叶、茎、花和种子中获得的Latifolia植物的绿色物质。通过对该植物的研磨,得到了粒度为1-3毫米的粉末。然后,用乙醇提取粉末。所得产品(浓缩液)为无定形凝胶状物质,颜色为深绿色,具有特殊气味,易溶于水。在自然草场进行了5个生物群落的野外调查,面积为4-25 m2。在淡水软体动物中记录到3种腹足动物:Planorbis Planorbis、Planorbarius corneus、Physa fontinalis、lynaea truncatula和L. palustris。在牧场条件下进行的实验结果表明,所研究的植物剂对吸虫病原体的中间宿主池塘鱼具有较高的杀虫活性。当用10.0 g/l的工作溶液处理时,所研制的杀软体动物剂对腹足动物的有效性为98.1 ~ 100%。
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引用次数: 0
Importance of BLUP method in plant breeding BLUP方法在植物育种中的重要性
Pub Date : 2022-05-31 DOI: 10.29328/journal.jpsp.1001072
Tajalifar Mahdi, Rasooli Mohammad
Introduction: The most desirable linear neutral prediction (BLUP) is a standard method for estimating the random effects of a hybrid model. This approach was originally developed in animal breeding to estimate breeding values and is now widely used in many fields of research. The main practical advantages of using REML/BLUP are: It allows the comparison of individuals or species over time (generation, year) and space (location, block). Possibility of simultaneous correction of environmental effects, estimation of variance components, and prediction of genetic values. The best BLUP prediction method, which estimates the averages with high accuracy, especially in mixed models, is also used to evaluate multi-environment experimental data (MET). Blup is one method is statistical. Pedigree-based blup method. Materials and methods: The BLUP method achieves this goal by combining phenotypic data and information on pedigree relationships through an index, known as family index selection. This index, which is estimated based on the coefficient of intra-class correlation, exploits the relationships of individuals within a family compared to other families in the population. Results: The results: show that BLUP has good prediction accuracy compared to other methods. Pedigree-based BLUP method can increase selection yield in production-related traits in P. zonale or shelf life of D. caryophyllus L.
引言:最理想的线性中立预测(BLUP)是估计混合模型随机效应的标准方法。这种方法最初是在动物育种中开发的,用于估计繁殖价值,现在被广泛应用于许多研究领域。使用REML/BLUP的主要实际优势是:它允许在时间(世代、年份)和空间(位置、区块)上对个体或物种进行比较。同时校正环境影响、估计方差分量和预测遗传值的可能性。最佳BLUP预测方法以高精度估计平均值,特别是在混合模型中,也用于评估多环境实验数据(MET)。Blup是一种统计方法。基于谱系的模糊方法。材料和方法:BLUP方法通过一种称为家族指数选择的指数,将表型数据和谱系关系信息相结合,从而实现这一目标。该指数是根据阶级内部相关性系数估计的,利用了一个家庭中个人与人口中其他家庭的关系。结果:结果表明,与其他方法相比,BLUP具有良好的预测精度。基于系谱的BLUP方法可以提高P.zonale生产相关性状的选择产量或石竹的货架期。
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引用次数: 1
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Journal of plant science and phytopathology
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