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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Amazônia Oriental. |
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Data corrente: |
15/07/2009 |
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Data da última atualização: |
11/11/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SUTTON, J. C.; SOPHER, C. R.; OWEN-GOING, T. N.; LIU, W.; GRODZINSKI, B.; HALL, J. C.; BENCHIMOL, R. L. |
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Afiliação: |
JOHN 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. |
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Título: |
Etiology and epidemiology of Pythium root rot in hydroponic crops: current knowledge and perspectives. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Summa Phytopathologica, Botucatu, v. 32, n. 4, p. 307-321, Oct./Dec. 2006. |
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Idioma: |
Inglês |
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Notas: |
Revisão. |
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Conteúdo: |
The 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. MenosThe 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 hig... Mostrar Tudo |
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Palavras-Chave: |
Ambiente radicular; Crescimento da parte aérea; Epidemiologia da podridão radicular; Fatores patogênicos; Fotossíntese por unidade de área foliar; Interferências humanas; Produção de inóculo em raízes; Pythium dissotocum; Sistemas hidropônicos; Zona radicular. |
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Thesagro: |
Desinfecção; Podridão Radicular; Pythium Aphanidermatum; Solução Nutritiva. |
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Categoria do assunto: |
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F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/18070/1/a01v32n4.pdf
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Marc: |
LEADER 03601naa a2200373 a 4500
001 1576855
005 2016-11-11
008 2006 bl uuuu u00u1 u #d
100 1 $aSUTTON, J. C.
245 $aEtiology and epidemiology of Pythium root rot in hydroponic crops$bcurrent knowledge and perspectives.
260 $c2006
500 $aRevisão.
520 $aThe 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.
650 $aDesinfecção
650 $aPodridão Radicular
650 $aPythium Aphanidermatum
650 $aSolução Nutritiva
653 $aAmbiente radicular
653 $aCrescimento da parte aérea
653 $aEpidemiologia da podridão radicular
653 $aFatores patogênicos
653 $aFotossíntese por unidade de área foliar
653 $aInterferências humanas
653 $aProdução de inóculo em raízes
653 $aPythium dissotocum
653 $aSistemas hidropônicos
653 $aZona radicular
700 1 $aSOPHER, C. R.
700 1 $aOWEN-GOING, T. N.
700 1 $aLIU, W.
700 1 $aGRODZINSKI, B.
700 1 $aHALL, J. C.
700 1 $aBENCHIMOL, R. L.
773 $tSumma Phytopathologica, Botucatu$gv. 32, n. 4, p. 307-321, Oct./Dec. 2006.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| 1. |  | PINHEIRO, L. E. L.; MORAES, J. C. F.; MATTEVI, M. S.; ERDTMANN, B.; SALZANO, F. M.; MIES FILHO, A. Two types of y chromosome in a Brazilian cattle breed. Caryologia, v. 33, n. 1, p. 25-32, 1980.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
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