Hypersensitive Response
Mostrando 13-24 de 423 artigos, teses e dissertações.
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13. Differentially expressed stress-related genes in the compatible citrus-Citrus leprosis virus interaction
Leprosis, caused by Citrus leprosis virus, cytoplasmic type (CiLV-C), is the main viral disease in the Brazilian citrus industry. This occurs because of the widespread source of inoculum and the year-round presence of the vector, the tenuipalpid mite Brevipalpus phoenicis, in citrus plants. In addition, while some Citrus species are resistant to CiLV-C, C. s
Genetics and Molecular Biology. Publicado em: 2007
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14. Putative resistance genes in the CitEST database
Disease resistance in plants is usually associated with the activation of a wide variety of defense responses to prevent pathogen replication and/or movement. The ability of the host plant to recognize the pathogen and to activate defense responses is regulated by direct or indirect interaction between the products of plant resistance (R) and pathogen avirul
Genetics and Molecular Biology. Publicado em: 2007
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15. Molecular and functional characterization of the NAC transfactor family from soybean (Glycine max) / Caracterização molecular e funcional de transfatores da família NAC de soja (Glycine max)
The identification of cell signaling pathways in response to different stresses has become a major focus for understanding the molecular bases of plantenvironment interactions. We have previously identified a set of soybean genes co-regulated by ER- and osmotic stresses, which possibly constitute a novel integrative pathway in plants. Among the identified ge
Publicado em: 2007
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16. CaracterizaÃÃo da variabilidade natural da resposta a um isolado brasileiro de Xanthomonas campestris pv. campestris em Arabidopsis thaliana
Phytopathogens are problems for agriculture as they reduce both crop quality and quantity. Chemicals are frequently used to control plant pathogens. However, they are undesirable because of increased production costs to farmers as well as environmental and consumer health negative impacts. An alternative to the use of chemicals is the development of varietie
Publicado em: 2006
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17. Genetic diversity of Xanthomonas campestris pv. campestris in Brazil / Diversidade genética de Xanthomonas campestris pv. campestris no Brasil
Brazilian and foreign isolates of Xanthomonas campestris pv. campestris (Xcc), as well as a foreign strain of X. campestris pv. armoraciae were studied regarding their phenotipic and genotipic variability by metabolic analysis (BiologTM), fatty acids methyl ester (FAME), pulsed field gel electrophoresis (PFGE) and inoculation in differential series. Results
Publicado em: 2006
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18. Isolamento de genes envolvidos na patogenicidade de xanthomonas campestris pv. vesicatoria
XanthomonBB campestri.s pv. vesicatoria is the causal agent of leaf spot on pepper and tomato. Four non-pathogenic mutants were isolated from the pathogenic strain 479/Nalr after mutagenesis with NTG and UV. The mutants were screened through d1fferent pathogenicity tests. They were prototrophic_ showed the same growth rate of the wild type , produced amilase
Publicado em: 1992
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19. Inhibition by Agrobacterium tumefaciens and Pseudomonas savastanoi of development of the hypersensitive response elicited by Pseudomonas syringae pv. phaseolicola.
Injection into tobacco leaves of biotype 1 Agrobacterium tumefaciens or of Pseudomonas savastanoi inhibited the development of a visible hypersensitive response to the subsequent injection at the same site of Pseudomonas syringae pv. phaseolicola. This interference with the hypersensitive response was not seen with injection of bacterial growth medium or Esc
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20. The Active Oxygen Response of Cell Suspensions to Incompatible Bacteria Is Not Sufficient to Cause Hypersensitive Cell Death.
The inoculation of tobacco (Nicotiana tabacum L.) suspension cells with bacterial pathogens that elicit the hypersensitive response (HR) in leaves has been shown to elicit production of active oxygen. This response occurs in two phases, the second of which occurs 1 to 3 h after bacterial addition and is unique to HR-causing interactions. The relationship bet
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21. Influence of Pseudomonas syringae culture conditions on initiation of the hypersensitive response of culture tobacco cells.
The inhibitor sensitivity and timing of the ionic response of suspension-cultured tobacco cells were used as a bioassay for the Pseudomonas syringae signal that elicits the hypersensitive response in resistant plants. The ionic response of tobacco cell suspensions inoculated with P. syringae pv. syringae 61 and P. syringae pv. pisi grown in rich media was in
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22. Function of the oxidative burst in hypersensitive disease resistance.
Microbial elicitors or attempted infection with an avirulent pathogen strain causes the rapid production of reactive oxygen intermediates. Recent findings indicate that H2O2 from this oxidative burst plays a central role in the orchestration of the hypersensitive response: (i) as the substrate driving the cross-linking of cell wall structural proteins to slo
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23. Molecular Characterization of Natural Erwinia pyrifoliae Strains Deficient in Hypersensitive Response
From necrotic tissue of a Nashi pear tree, 24 Erwinia pyrifoliae strains, found to be identical by pulsed-field gel electrophoresis analysis, were isolated. Thirteen strains were not virulent on immature pears and did not induce a hypersensitive response in tobacco leaves. The defective gene hrpL was complemented with intact genes from E. pyrifoliae and Erwi
American Society for Microbiology.
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24. Liver cells contain constitutive DNase I-hypersensitive sites at the xenobiotic response elements 1 and 2 (XRE1 and -2) of the rat cytochrome P-450IA1 gene and a constitutive, nuclear XRE-binding factor that is distinct from the dioxin receptor.
Dioxin stimulates transcription from the cytochrome P-450IA1 promoter by interaction with the intracellular dioxin receptor. Upon binding of ligand, the receptor is converted to a form which specifically interacts in vitro with two dioxin-responsive positive control elements located in close proximity to each other about 1 kb upstream of the rat cytochrome P