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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
13/10/1992 |
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Data da última atualização: |
22/05/2017 |
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Autoria: |
FRANCA NETO, J. B.; WEST, S. H. |
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Afiliação: |
EMBRAPA-CNPSo. Londrina, PR. |
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Título: |
Effects of Collectotrichum truncatum and Cercospora kikuchii on viability and quality of soybean seed. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Journal of Seed Technology, Beltsville, v.13, n.2, p.136-149, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
Seventy-three seed samples of 23 soybean [Glycine max (L.) Merr.] cultivars produced in Florida in 1986 were analyzed for germination, vigor [tetrazolium (TZ) test], and presence of seedborne pathogens. Thirty percent of the samples contained from 5 to 20% (high) infection by Colletotrichum truncatum (Schw.) Andrus & Moore. Infection was mainly restricted to the seed coat, but 50% of the seed lots with high levels of infection had embryo infection from 1 to 10%. Although C. truncatum infected fewer seeds than Phomopsis spp., it caused more damping-off, regardless of seed vigor level. As the pathogen incidence increased, the amount of damping-of also increased. These detrimental effects were observed on the standard germination test (rolled paper towels) which also was severely affected by high levels of Phomopsis spp. The TZ test values were not affected by the presence of these fungi, thus giving the highest percent germination. Sand emergence provided estimates of germination for seed lots with high incidence of infection by C. truncatum that more nearly simulated what would be expected in the field under ideal conditions. Seventeen percent o the samples contained high levels (7 to 33%) of infection by Cercospora kikuchii (Matsu. & Tomoyasu). This pathogen was almost exclusively restricted to the seedcoat. An antagonistic effect was observed between C. kikuchii and Phomopsis spp. infecting soybean seeds: the higher the level of seed infection by C. kikuchii, the lower the seed infection by Phomopsis spp. No detrimental pathogen effects of seed infection of this pathogen were observed on germination, emergence, and vigor of soybean seed with the natural levels of C. kikuchii infected seeds used in this study. MenosSeventy-three seed samples of 23 soybean [Glycine max (L.) Merr.] cultivars produced in Florida in 1986 were analyzed for germination, vigor [tetrazolium (TZ) test], and presence of seedborne pathogens. Thirty percent of the samples contained from 5 to 20% (high) infection by Colletotrichum truncatum (Schw.) Andrus & Moore. Infection was mainly restricted to the seed coat, but 50% of the seed lots with high levels of infection had embryo infection from 1 to 10%. Although C. truncatum infected fewer seeds than Phomopsis spp., it caused more damping-off, regardless of seed vigor level. As the pathogen incidence increased, the amount of damping-of also increased. These detrimental effects were observed on the standard germination test (rolled paper towels) which also was severely affected by high levels of Phomopsis spp. The TZ test values were not affected by the presence of these fungi, thus giving the highest percent germination. Sand emergence provided estimates of germination for seed lots with high incidence of infection by C. truncatum that more nearly simulated what would be expected in the field under ideal conditions. Seventeen percent o the samples contained high levels (7 to 33%) of infection by Cercospora kikuchii (Matsu. & Tomoyasu). This pathogen was almost exclusively restricted to the seedcoat. An antagonistic effect was observed between C. kikuchii and Phomopsis spp. infecting soybean seeds: the higher the level of seed infection by C. kikuchii, the lower the ... Mostrar Tudo |
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Palavras-Chave: |
Damping-off; Disease; Emergence; Fitopatologia; Fungus; Phomopsis spp; Phytopathology; Purple seed stain; Quality; Seed; Soybean; Teste; Tetrazolio; Tetrazolium test. |
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Thesagro: |
Cercospora Kikuchii; Colletotrichum Truncatum; Doença; Emergência; Fungo; Germinação; Glycine Max; Mancha Púrpura; Qualidade; Semente; Soja; Tombamento. |
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Thesaurus Nal: |
germination; vigor. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02930naa a2200469 a 4500
001 1444627
005 2017-05-22
008 1989 bl uuuu u00u1 u #d
100 1 $aFRANCA NETO, J. B.
245 $aEffects of Collectotrichum truncatum and Cercospora kikuchii on viability and quality of soybean seed.
260 $c1989
520 $aSeventy-three seed samples of 23 soybean [Glycine max (L.) Merr.] cultivars produced in Florida in 1986 were analyzed for germination, vigor [tetrazolium (TZ) test], and presence of seedborne pathogens. Thirty percent of the samples contained from 5 to 20% (high) infection by Colletotrichum truncatum (Schw.) Andrus & Moore. Infection was mainly restricted to the seed coat, but 50% of the seed lots with high levels of infection had embryo infection from 1 to 10%. Although C. truncatum infected fewer seeds than Phomopsis spp., it caused more damping-off, regardless of seed vigor level. As the pathogen incidence increased, the amount of damping-of also increased. These detrimental effects were observed on the standard germination test (rolled paper towels) which also was severely affected by high levels of Phomopsis spp. The TZ test values were not affected by the presence of these fungi, thus giving the highest percent germination. Sand emergence provided estimates of germination for seed lots with high incidence of infection by C. truncatum that more nearly simulated what would be expected in the field under ideal conditions. Seventeen percent o the samples contained high levels (7 to 33%) of infection by Cercospora kikuchii (Matsu. & Tomoyasu). This pathogen was almost exclusively restricted to the seedcoat. An antagonistic effect was observed between C. kikuchii and Phomopsis spp. infecting soybean seeds: the higher the level of seed infection by C. kikuchii, the lower the seed infection by Phomopsis spp. No detrimental pathogen effects of seed infection of this pathogen were observed on germination, emergence, and vigor of soybean seed with the natural levels of C. kikuchii infected seeds used in this study.
650 $agermination
650 $avigor
650 $aCercospora Kikuchii
650 $aColletotrichum Truncatum
650 $aDoença
650 $aEmergência
650 $aFungo
650 $aGerminação
650 $aGlycine Max
650 $aMancha Púrpura
650 $aQualidade
650 $aSemente
650 $aSoja
650 $aTombamento
653 $aDamping-off
653 $aDisease
653 $aEmergence
653 $aFitopatologia
653 $aFungus
653 $aPhomopsis spp
653 $aPhytopathology
653 $aPurple seed stain
653 $aQuality
653 $aSeed
653 $aSoybean
653 $aTeste
653 $aTetrazolio
653 $aTetrazolium test
700 1 $aWEST, S. H.
773 $tJournal of Seed Technology, Beltsville$gv.13, n.2, p.136-149, 1989.
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