Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/576855
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dc.contributor.authorSUTTON, J. C.pt_BR
dc.contributor.authorSOPHER, C. R.pt_BR
dc.contributor.authorOWEN-GOING, T. N.pt_BR
dc.contributor.authorLIU, W.pt_BR
dc.contributor.authorGRODZINSKI, B.pt_BR
dc.contributor.authorHALL, J. C.pt_BR
dc.contributor.authorBENCHIMOL, R. L.pt_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created2009-12-01pt_BR
dc.date.issued2006pt_BR
dc.identifier.citationSumma Phytopathologica, Botucatu, v. 32, n. 4, p. 307-321, Oct./Dec. 2006.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/576855pt_BR
dc.descriptionThe etiology and epidemiology of Pythium root rot in hydroponically-grown crops are reviewed with emphasis on knowledge and concepts considered important for managing the disease in commercial greenhouses. Pythium root rot continually threatens the productivity of numerous kinds of crops in hydroponic systems around the world including cucumber, tomato, sweet pepper, spinach, lettuce, nasturtium, arugula, rose, and chrysanthemum. Principal causal agents include Pythium aphanidermatum, Pythium dissotocum, members of Pythium group F, and Pythium ultimum var. ultimum. Perspectives are given of sources of initial inoculum of Pythium spp. in hydroponic systems, of infection and colonization of roots by the pathogens, symptom development and inoculum production in host roots, and inoculum dispersal in nutrient solutions. Recent findings that a specific elicitor produced by P. aphanidermatum may trigger necrosis (browning) of the roots and the transition from biotrophic to necrotrophic infection are considered. Effects on root rot epidemics of host factors (disease susceptibility, phenological growth stage, root exudates and phenolic substances), the root environment (rooting media, concentrations of dissolved oxygen and phenolic substances in the nutrient solution, microbial communities and temperature) and human interferences (cropping practices and control measures) are reviewed. Recent findings on predisposition of roots to Pythium attack by environmental stress factors are highlighted. The commonly minor impact on epidemics of measures to disinfest nutrient solution as it recirculates outside the crop is contrasted with the impact of treatments that suppress Pythium in the roots and root zone of the crop. New discoveries that infection of roots by P. aphanidermatum markedly slows the increase in leaf area and whole-plant carbon gain without significant effect on the efficiency of photosynthesis per unit area of leaf are noted. The platform of knowledge and understanding of the etiology and epidemiology of root rot, and its effects on the physiology of the whole plant, are discussed in relation to new research directions and development of better practices to manage the disease in hydroponic crops. Focus is on methods and technologies for tracking Pythium and root rot, and on developing, integrating, and optimizing treatments to suppress the pathogen in the root zone and progress of root rot.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectPythium dissotocumpt_BR
dc.subjectZona radicularpt_BR
dc.subjectCrescimento da parte aéreapt_BR
dc.subjectEpidemiologia da podridão radicularpt_BR
dc.subjectFatores patogênicospt_BR
dc.subjectSistemas hidropônicospt_BR
dc.subjectProdução de inóculo em raízespt_BR
dc.subjectAmbiente radicularpt_BR
dc.subjectInterferências humanaspt_BR
dc.subjectFotossíntese por unidade de área foliarpt_BR
dc.titleEtiology and epidemiology of Pythium root rot in hydroponic crops: current knowledge and perspectives.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-11-11T11:11:11Zpt_BR
dc.subject.thesagroDesinfecçãopt_BR
dc.subject.thesagroPodridão Radicularpt_BR
dc.subject.thesagroPythium Aphanidermatumpt_BR
dc.subject.thesagroSolução Nutritivapt_BR
dc.description.notesRevisão.pt_BR
riaa.ainfo.id576855pt_BR
riaa.ainfo.lastupdate2016-11-11pt_BR
dc.contributor.institutionJOHN CLIFFORD SUTTON, UNIVERSITY OF GUELPH; CORALIE RACHELLE SOPHER, UNIVERSITY OF GUELPH; TONY NATHANIEL OWEN-GOING, UNIVERSITY OF GUELPH; WEIZHONG LIU, UNIVERSITY OF GUELPH; BERNARD GRODZINSKI, UNIVERSITY OF GUELPH; JOHN CHRISTOPHER HALL, UNIVERSITY OF GUELPH; RUTH LINDA BENCHIMOL, CPATU.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CPATU)

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