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Registros recuperados: 8
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Defense mechanisms of Solanum tuberosum L. in response to attack by plant-pathogenic bacteria Biol. Res.
POIATTI,VERA A D; DALMAS,FERNANDO R; ASTARITA,LEANDRO V.
The natural resistance of plants to disease is based not only on preformed mechanisms, but also on induced mechanisms. The defense mechanisms present in resistant plants may also be found in susceptible ones. This study attempted to analyze the metabolic alterations in plants of the potato Solanum tuberosum L. cv. Agata that were inoculated with the incompatible plant-pathogenic bacteria X. axonopodis and R. solanacearum, and the compatible bacterium E. carotovora. Levels of total phenolic compounds, including the flavonoid group, and the activities of polyphenol oxidase (PPO) and peroxidase (POX) were evaluated. Bacteria compatibility was evaluated by means of infiltration of tubers. The defense response was evaluated in the leaves of the potato plants....
Tipo: Journal article Palavras-chave: Flavonoids; Hypersensitive response; Peroxidases; Phenolic compounds.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200009
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Establishment of an in vitro system for studies on the induced resistance of cotton to Xanthomonas campestris pv. malvacearum PAB
KOBAYASHI,ADILSON KENJI; VIEIRA,LUIZ GONZAGA ESTEVES.
An in vitro system for studying the resistance response of cotton (Gossypium hirsutum L.) to Xanthomonas campestris pv. malvacearum was investigated. Cell suspension cultures, established from hypocotyl-derived callus of cotton cultivar 101-102B, were treated with bacterial extracellular polysaccharides (EPS) extracted from the incompatible race 18 of X. campestris pv. malvacearum. EPS at 600 mug/mL caused pronounced darkening of the suspension cultures, as indicative of cell death, 48 hours after incubation. Protein electrophoresis analysis of the time course of EPS-treated cells showed differential accumulation of several protein bands after 12-24 hours. The time course of protein accumulation and cell death was consistent with an elicitor-mediated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirsutum; Bacterial blight; Extracellular polysaccharides; Cell suspension culture; Hypersensitive response.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000400007
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Identification and characterization of molecular factors associated with the Phytophthora cinnamomi infection mechanisms IPB - Escola Superior Agrária
Choupina, Altino; Meirinho, Sofia; Carvalho, Marisa; Jorge, Lurdes; Sousa, Maria João; Cravador, Alfredo.
Tipo: Article Palavras-chave: Castanea sativa Mill.; Phytophthora cinnamomi; Hypersensitive response; Systemic acquired resistance.
Ano: 2009 URL: http://hdl.handle.net/10198/3421
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Identification and characterization of molecular factors associated with the Phytophthora cinnamomi infection mechanisms IPB - Escola Superior Agrária
Choupina, Altino; Meirinho, Sofia; Carvalho, Marisa; Jorge, Lurdes; Sousa, Maria João; Cravador, Alfredo.
Tipo: ConferenceObject Palavras-chave: Castanea sativa Mill.; Phytophthora cinnamomi; Hypersensitive response; Systemic acquired resistance.
Ano: 2009 URL: http://hdl.handle.net/10198/3417
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Mecanismos de defesa de plantas contra o ataque de agentes fitopatogênicos. Infoteca-e
FERNANDES, C. de F.; VIEIRA JUNIOR, J. R.; SILVA, D. S. G. da; REIS, N. D.; ANTUNES JÚNIOR, H..
Este trabalho apresenta os principais aspectos envolvidos no mecanismo de defesa de plantas contra o ataque de patógenos, evidenciando a atuação de cada componente.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Plant defense; Resposta Hipersensitiva; Fitopatógeno.; Controle Biológico; Defesa Vegetal; Patógeno.; Plant pathogens; Hypersensitive response; Biological control..
Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/710939
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Signal transduction in lemon seedlings in the hypersensitive response against Alternaria alternata: participation of calmodulin, G-protein and protein kinases Biol. Res.
ORTEGA,XIMENA; POLANCO,RUBÉN; CASTAÑEDA,PATRICIA; PEREZ,LUZ M.
The development of an effective hypersensitive response (HR) in any plant system relies, not only in their gene composition and expression, but also on an effective and rapid signal transduction system. Lemon seedlings induce the phenylpropanoid pathway, which results in the de novo biosynthesis of the phytoalexin scoparone, as part of the hypersensitive response against Alternaria alternata. In order to elucidate some of the signaling elements that participate in the development of HR in lemon seedlings, we used several compounds that are known as activators or inhibitors of signal transduction elements in plants or in animal cells. Lemon seedlings treated either with cholera toxin or with phorbol 12-myristate 13-acetate (PMA), in the absence of A....
Tipo: Journal article Palavras-chave: Citrus limon; Hypersensitive response; Signal transduction.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000300012
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The development of Alternaria alternata is prevented by chitinases and ß-1,3- glucanases from Citrus limon seedlings Biol. Res.
FANTA,NORA; ORTEGA,XIMENA; PÉREZ,LUZ M.
In addition to phytoalexin synthesis, the defense response of intact Citrus limon seedlings against Alternaria alternata involves both constitutive and induced enzyme activities such as chitinases (Ch) and ß-1,3-glucanases (Glu). A. alternata conidial germination was prevented by protein extracts from inoculated lemon seedlings, but also by extracts from mock-inoculated specimens. On the other hand, degradation of mycelia was accomplished only by protein extracts from inoculated seedlings. The presence of six Ch isoenzymes and of four Glu isoenzymes was detected in protein extracts from mock-inoculated seedlings. As a result of fungal inoculation, the isoenzyme pattern of Ch and Glu changed, making possible the detection of a new Ch isoenzyme and of three...
Tipo: Journal article Palavras-chave: Alternaria alternata; Lemon; Hypersensitive response; Chitinases; Glucanases.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000300012
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กระบวนการเกิด Programmed cell death ในเซลล์ใบอ้อยที่เป็นโรคใบขาว Thai Agricultural
Kanjana Kirasak; Taksina Sansayawichai; Weerapon Polrakdee.
White leaf disease of sugarcane, which is more damage to economic crops in Thailand. It is infectedby phytoplasma pathogenic and transmitted plant by leafhoppers vector. There are several symptoms that indicate the white colour, white-green and yellow leaf etc. The symptoms are affecting to sugarcane growth and yield vary according to the intensity of the symptoms. The most severe were effect on the death and no yield. There is no way the get rid phytoplasma and no disease-resistant varieties. This research leads to understand the mechanism of the effect of phytoplasma to damage sucarcane in the expression of the white leaf disease symptoms. Application for renewal of the sugarcane is the serious disease that can survive until the yield. Processes of...
Tipo: Collection Palavras-chave: Hypersensitive response; Programmed cell death; Ultrastructure; White leaf disease; อ้อย; เซลล์ใบอ้อย; โรคใบขาวอ้อย; เชื้อไฟโตพลาสมา; อาการเซลล์ตาย; การเจริญเติบโต; ผลผลิต.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5557
Registros recuperados: 8
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