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Registros recuperados : 65 | |
20. | | KRZYZANOWSKI, F. C.; WEST, S. H.; FRANÇA-NETO, J. B. Drying maize seed using ambient temperature at low relative humidity. Informativo ABRATES, Londrina, v. 13, n. 3, p. 96, set. 2003. Número especial, ref. 070. Edição dos Resumos do XIII Congresso Brasileiro de Sementes, Gramado, RS, set. 2003. Biblioteca(s): Embrapa Soja. |
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Registros recuperados : 65 | |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
13/10/1992 |
Data da última atualização: |
22/05/2017 |
Autoria: |
FRANCA NETO, J. B.; WEST, S. H. |
Afiliação: |
EMBRAPA-CNPSo. Londrina, PR. |
Título: |
Problems in evaluating viability of soybean seed infected with Phomopsis spp. |
Ano de publicação: |
1989 |
Fonte/Imprenta: |
Journal of Seed Technology, Beltsville, v.13, n.2, p.122-135, 1989. |
Idioma: |
Inglês |
Conteúdo: |
The detrimental effects of Phomopsis spp. on seed germination of soybean [Glycine max (L.) Merrill] are broadly recognized. Rolled paper toweling is the most widely used method for testing germination of soybean seed. The validity of the rolled-paper-towel test to determine the actual viability of soybean seed infected with Phomopsis spp. was examined. Seventy-three seed samples of 23 soybean cultivars produced in Florida in 1986 were analyzed for germination, vigor [tetrazolium (TZ) test], and pathogens. Phomopsis spp. were the fungi most frequently associated with soybean seed (up to 77% seed infection). Infection by these microrganisms was mainly restricted to the seedcoat. Deep-seated infection was rare (mean 0.5%). Viability, as obtained by the standard germination test (rolled paper toweling) was drastically reduced by high (> 33%) levels of Phomopsis spp. These detrimental effects were not observed when germination was examined in sand, if conditions were adequate for fast emergence. When seed were tested in sand, the infected seedcoats remained in or on the sand upon emergence, thus the seedlings escaped much of the detrimental effects of infected seedcoats. Therefore, rolled paper toweling was not the best substrate to evaluate germination of soybean seed infeced with high levels of Phomopsis spp. Emergence in sand or the TZ test provided more realistic estimates of viability for seed lots infected with these fungi. Nevertheless, it was noted that as the vigor level expressed by the TZ test decreased, the level of infected seedlings and damping-off tended to increase. MenosThe detrimental effects of Phomopsis spp. on seed germination of soybean [Glycine max (L.) Merrill] are broadly recognized. Rolled paper toweling is the most widely used method for testing germination of soybean seed. The validity of the rolled-paper-towel test to determine the actual viability of soybean seed infected with Phomopsis spp. was examined. Seventy-three seed samples of 23 soybean cultivars produced in Florida in 1986 were analyzed for germination, vigor [tetrazolium (TZ) test], and pathogens. Phomopsis spp. were the fungi most frequently associated with soybean seed (up to 77% seed infection). Infection by these microrganisms was mainly restricted to the seedcoat. Deep-seated infection was rare (mean 0.5%). Viability, as obtained by the standard germination test (rolled paper toweling) was drastically reduced by high (> 33%) levels of Phomopsis spp. These detrimental effects were not observed when germination was examined in sand, if conditions were adequate for fast emergence. When seed were tested in sand, the infected seedcoats remained in or on the sand upon emergence, thus the seedlings escaped much of the detrimental effects of infected seedcoats. Therefore, rolled paper toweling was not the best substrate to evaluate germination of soybean seed infeced with high levels of Phomopsis spp. Emergence in sand or the TZ test provided more realistic estimates of viability for seed lots infected with these fungi. Nevertheless, it was noted that as the vigor level... Mostrar Tudo |
Palavras-Chave: |
Disease; Emergence; EUA; Phomopsis spp; Seed; Soybean; Teste; Tetrazolio; Tetrazolium test; USA. |
Thesagro: |
Doença; Emergência; Fungo; Germinação; Glycine Max; Semente; Soja. |
Thesaurus NAL: |
Florida; germination; vigor. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02503naa a2200373 a 4500 001 1444629 005 2017-05-22 008 1989 bl uuuu u00u1 u #d 100 1 $aFRANCA NETO, J. B. 245 $aProblems in evaluating viability of soybean seed infected with Phomopsis spp. 260 $c1989 520 $aThe detrimental effects of Phomopsis spp. on seed germination of soybean [Glycine max (L.) Merrill] are broadly recognized. Rolled paper toweling is the most widely used method for testing germination of soybean seed. The validity of the rolled-paper-towel test to determine the actual viability of soybean seed infected with Phomopsis spp. was examined. Seventy-three seed samples of 23 soybean cultivars produced in Florida in 1986 were analyzed for germination, vigor [tetrazolium (TZ) test], and pathogens. Phomopsis spp. were the fungi most frequently associated with soybean seed (up to 77% seed infection). Infection by these microrganisms was mainly restricted to the seedcoat. Deep-seated infection was rare (mean 0.5%). Viability, as obtained by the standard germination test (rolled paper toweling) was drastically reduced by high (> 33%) levels of Phomopsis spp. These detrimental effects were not observed when germination was examined in sand, if conditions were adequate for fast emergence. When seed were tested in sand, the infected seedcoats remained in or on the sand upon emergence, thus the seedlings escaped much of the detrimental effects of infected seedcoats. Therefore, rolled paper toweling was not the best substrate to evaluate germination of soybean seed infeced with high levels of Phomopsis spp. Emergence in sand or the TZ test provided more realistic estimates of viability for seed lots infected with these fungi. Nevertheless, it was noted that as the vigor level expressed by the TZ test decreased, the level of infected seedlings and damping-off tended to increase. 650 $aFlorida 650 $agermination 650 $avigor 650 $aDoença 650 $aEmergência 650 $aFungo 650 $aGerminação 650 $aGlycine Max 650 $aSemente 650 $aSoja 653 $aDisease 653 $aEmergence 653 $aEUA 653 $aPhomopsis spp 653 $aSeed 653 $aSoybean 653 $aTeste 653 $aTetrazolio 653 $aTetrazolium test 653 $aUSA 700 1 $aWEST, S. H. 773 $tJournal of Seed Technology, Beltsville$gv.13, n.2, p.122-135, 1989.
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