Готові списки джерел за темами / Avirulence factors

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Добірка наукової літератури з теми "Avirulence factors"

Автор: Grafiati

Опубліковано: 8 березня 2025

Оновлено: 29 липня 2025

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Статті в журналах з теми "Avirulence factors"

Janzac, Bérenger, Josselin Montarry, Alain Palloix, Olivier Navaud, and Benoît Moury. "A Point Mutation in the Polymerase of Potato virus Y Confers Virulence Toward the Pvr4 Resistance of Pepper and a High Competitiveness Cost in Susceptible Cultivar." Molecular Plant-Microbe Interactions® 23, no. 6 (2010): 823–30. http://dx.doi.org/10.1094/mpmi-23-6-0823.

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To understand why the Pvr4 resistance of pepper against Potyvirus spp. remained durable in field conditions while virulent Potato virus Y (PVY) variants could be selected in the laboratory, we studied the molecular mechanisms which generated these variants and the consequences on viral fitness. Using a reverse genetics approach with an infectious cDNA clone of PVY, we found that the region coding for the NIb protein (RNA-dependent RNA polymerase) of PVY was the avirulence factor corresponding to Pvr4 and that a single nonsynonymous nucleotide substitution in that region, an adenosine to guanos

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Waalwijk, Cees, and Jacq R. A. De Koning. "Towards Isolation of Avirulence Factors in Fusarium Oxysporum from Carnation." Cereal Research Communications 25, no. 3 (1997): 841–43. http://dx.doi.org/10.1007/bf03543869.

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Zhu, Weiguang, Bing Yang, Jaishree M. Chittoor, Lowell B. Johnson, and Frank F. White. "AvrXa10 Contains an Acidic Transcriptional Activation Domain in the Functionally Conserved C Terminus." Molecular Plant-Microbe Interactions® 11, no. 8 (1998): 824–32. http://dx.doi.org/10.1094/mpmi.1998.11.8.824.

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The avrXa10 gene of Xanthomonas oryzae pv. oryzae, the causal agent of bacterial blight of rice, is a member of the avrBs3 avirulence gene family and directs the elicitation of resistance in a gene-for-gene manner on rice lines carrying the resistance gene Xa10. The carboxyl (C) terminus of AvrXa10 has a previously undescribed domain that is structurally similar to the acidic activation domain of many eukaryotic transcription factors in addition to three nuclear localization signal (NLS) sequences. Removal of the C-terminal 38 codons containing the putative activation domain, but retaining the

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Huang, Changjun. "From Player to Pawn: Viral Avirulence Factors Involved in Plant Immunity." Viruses 13, no. 4 (2021): 688. http://dx.doi.org/10.3390/v13040688.

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In the plant immune system, according to the ‘gene-for-gene’ model, a resistance (R) gene product in the plant specifically surveils a corresponding effector protein functioning as an avirulence (Avr) gene product. This system differs from other plant–pathogen interaction systems, in which plant R genes recognize a single type of gene or gene family because almost all virus genes with distinct structures and functions can also interact with R genes as Avr determinants. Thus, research conducted on viral Avr-R systems can provide a novel understanding of Avr and R gene product interactions and i

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Huertas-González, M. D., M. C. Ruiz-Roldán, A. Di Pietro, and M. I. G. Roncero. "Cross protection provides evidence for race-specific avirulence factors inFusarium oxysporum." Physiological and Molecular Plant Pathology 54, no. 3-4 (1999): 63–72. http://dx.doi.org/10.1006/pmpp.1998.0185.

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Amezrou, Reda, Colette Audéon, Jérôme Compain, et al. "A secreted protease-like protein in Zymoseptoria tritici is responsible for avirulence on Stb9 resistance gene in wheat." PLOS Pathogens 19, no. 5 (2023): e1011376. http://dx.doi.org/10.1371/journal.ppat.1011376.

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Zymoseptoria tritici is the fungal pathogen responsible for Septoria tritici blotch on wheat. Disease outcome in this pathosystem is partly determined by isolate-specific resistance, where wheat resistance genes recognize specific fungal factors triggering an immune response. Despite the large number of known wheat resistance genes, fungal molecular determinants involved in such cultivar-specific resistance remain largely unknown. We identified the avirulence factor AvrStb9 using association mapping and functional validation approaches. Pathotyping AvrStb9 transgenic strains on Stb9 cultivars,

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Valent, B., L. Farrall, and F. G. Chumley. "Magnaporthe grisea genes for pathogenicity and virulence identified through a series of backcrosses." Genetics 127, no. 1 (1991): 87–101. http://dx.doi.org/10.1093/genetics/127.1.87.

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Abstract We have identified genes for pathogenicity toward rice (Oryza sativa) and genes for virulence toward specific rice cultivars in the plant pathogenic fungus Magnaporthe grisea. A genetic cross was conducted between the weeping lovegrass (Eragrostis curvula) pathogen 4091-5-8, a highly fertile, hermaphroditic laboratory strain, and the rice pathogen O-135, a poorly fertile, female-sterile field isolate that infects weeping lovegrass as well as rice. A six-generation backcrossing scheme was then undertaken with the rice pathogen as the recurrent parent. One goal of these crosses was to g

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Webb, Craig A., and John P. Fellers. "Cereal rust fungi genomics and the pursuit of virulence and avirulence factors." FEMS Microbiology Letters 264, no. 1 (2006): 1–7. http://dx.doi.org/10.1111/j.1574-6968.2006.00400.x.

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Bonshtien, Arale, Atar Lev, Avi Gibly, Paul Debbie, Adi Avni, and Guido Sessa. "Molecular Properties of the Xanthomonas AvrRxv Effector and Global Transcriptional Changes Determined by Its Expression in Resistant Tomato Plants." Molecular Plant-Microbe Interactions® 18, no. 4 (2005): 300–310. http://dx.doi.org/10.1094/mpmi-18-0300.

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The Xanthomonas campestris pv. vesicatoria avirulence gene avrRxv specifies resistance on the tomato line Hawaii 7998 by interacting with three nondominant plant resistance genes. AvrRxv molecular properties that impinge on its avirulence activity were characterized and transcriptional changes caused by AvrRxv expression in resistant tomato plants were extensively examined. AvrRxv localized predominantly to the cytoplasm and possibly in association with plasma and nuclear membranes in both resistant and susceptible tomato plants. The AvrRxv cysteine protease catalytic core was found to be esse

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Beams, Alexander B., Rebecca Bateman, and Frederick R. Adler. "Will SARS-CoV-2 Become Just Another Seasonal Coronavirus?" Viruses 13, no. 5 (2021): 854. http://dx.doi.org/10.3390/v13050854.

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The future prevalence and virulence of SARS-CoV-2 is uncertain. Some emerging pathogens become avirulent as populations approach herd immunity. Although not all viruses follow this path, the fact that the seasonal coronaviruses are benign gives some hope. We develop a general mathematical model to predict when the interplay among three factors, correlation of severity in consecutive infections, population heterogeneity in susceptibility due to age, and reduced severity due to partial immunity, will promote avirulence as SARS-CoV-2 becomes endemic. Each of these components has the potential to

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Більше джерел

Дисертації з теми "Avirulence factors"

Win, Joe. "Molecular Quest for Avirulence Factors in Venturia inaequalis." Thesis, University of Auckland, 2004. http://hdl.handle.net/2292/397.

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The molecular basis for the gene-for-gene relationship of Vm-resistance in apple to Venturia inaequalis was investigated. Incompatible reactions involved a hypersensitive response (HR), which was accompanied by the accumulation of dark brown pigments and autofluorescent materials in epidermal and mesophyll cells at the site of invasion. Cell-free culture filtrates of the avirulent isolate elicited an HR in the Vm host (h5) leaves, but not in the susceptible host (h1). The elicitor activity was resistant to boiling but was abolished by proteinase K digestion. Elicitation of HR was used to monit

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Dvorak, Etienne. "Bases génomiques de l’adaptation du mildiou aux résistances de la vigne : vers l’identification de gènes d’avirulence par une approche de génétique quantitative." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0361.

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L’utilisation de variétés résistantes est un levier majeur dans la lutte contre les maladies des plantes, mais l’adaptation des populations d’agents pathogènes limite leur durabilité. L’agent du mildiou de la vigne, l’oomycète Plasmopara viticola, s’est ainsi montré capable de contourner rapidement plusieurs facteurs de résistance récemment déployés en Europe. Les résistances de la vigne au mildiou sont majeures mais partielles, ce qui pose la question des mécanismes de virulence du pathogène dans une interaction phénotypiquement quantitative. Une approche de cartographie de QTL a été mise en

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Частини книг з теми "Avirulence factors"

Ben-Nathan, D., S. Lustig, and G. Feuerstein. "The Effect of Cold or Isolation Stress on Neuroinvasiveness and Neurovirulence of an Avirulent Variant of West Nile Virus (WN-25)." In Psychiatry and Biological Factors. Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-5811-4_27.

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Myers, Gerald, Kersti Maclnnes,, and Lynda Myers. "Phylogenetic Moments in the AIDS Epidemic." In Emerging Viruses. Oxford University PressNew York, NY, 1993. http://dx.doi.org/10.1093/oso/9780195074444.003.0012.

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Abstract By 1983, several laboratories had identified and isolated the etiologic agent of AIDS, the retrovirus now denoted HIV, and by 1985 nucleotide sequences derived from those early isolates were reported. This molecular information was available in time to address a flurry of speculations and allegations concerning the sudden emergence of the AIDS virus. In 1986, two avirulent strains of herpes simplex virus were discovered to have generated a lethal recombinant in vitro (Javier et al., 1986), and this quickly touched off speculation that the AIDS virus may have been similarly generated i

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Звіти організацій з теми "Avirulence factors"

Sessa, Guido, and Gregory Martin. A functional genomics approach to dissect resistance of tomato to bacterial spot disease. United States Department of Agriculture, 2004. http://dx.doi.org/10.32747/2004.7695876.bard.

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The research problem. Bacterial spot disease in tomato is of great economic importance worldwide and it is particularly severe in warm and moist areas affecting yield and quality of tomato fruits. Causal agent of spot disease is the Gram-negative bacterium Xanthomonas campestris pv. vesicatoria (Xcv), which can be a contaminant on tomato seeds, or survive in plant debris and in association with certain weeds. Despite the economic significance of spot disease, plant protection against Xcvby cultural practices and chemical control have so far proven unsuccessful. In addition, breeding for resist

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Zhao, Bingyu, Saul Burdman, Ronald Walcott, Tal Pupko, and Gregory Welbaum. Identifying pathogenic determinants of Acidovorax citrulli toward the control of bacterial fruit blotch of cucurbits. United States Department of Agriculture, 2014. http://dx.doi.org/10.32747/2014.7598168.bard.

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The specific objectives of this BARD proposal were: Use a comparative genomics approach to identify T3Es in group I, II and III strains of A. citrulli. Determine the bacterial genes contributing to host preference. Develop mutant strains that can be used for biological control of BFB. Background to the topic: Bacterial fruit blotch (BFB) of cucurbits, caused by Acidovoraxcitrulli, is a devastating disease that affects watermelon (Citrulluslanatus) and melon (Cucumismelo) production worldwide, including both Israel and USA. Three major groups of A. citrullistrains have been classified based on

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Sessa, Guido, and Gregory Martin. Role of GRAS Transcription Factors in Tomato Disease Resistance and Basal Defense. United States Department of Agriculture, 2005. http://dx.doi.org/10.32747/2005.7696520.bard.

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Анотація:

The research problem: Bacterial spot and bacterial speck diseases of tomato are causedby strains of Xanthomonas campestris pv. vesicatoria (Xcv) and Pseudomonas syringae pv.tomato (Pst), respectively. These bacteria colonize aerial parts of the plant and causesignificant losses in tomato production worldwide. Protection against Xcv and Pst bycultural practices or chemical control has been unsuccessful and there are only limitedsources of genetic resistance to these pathogens. In previous research supported in part byBARD IS-3237-01, we extensively characterized changes in tomato gene expressio

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Horwitz, Benjamin A., and Barbara Gillian Turgeon. Fungal Iron Acquisition, Oxidative Stress and Virulence in the Cochliobolus-maize Interaction. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7709885.bard.

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Our project focused on genes for high affinity iron acquisition in Cochliobolus heterostrophus, a necrotrophic pathogen of maize, and their intertwined relationship to oxidative stress status and virulence of the fungus on the host. An intriguing question was why mutants lacking the nonribosomal peptide synthetase (NRPS) gene (NPS6) responsible for synthesis of the extracellular siderophore, coprogen, are sensitive to oxidative stress. Our overall objective was to understand the mechanistic connection between iron stress and oxidative stress as related to virulence of a plant pathogen to its h

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