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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
06/03/1997 |
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Data da última atualização: |
31/03/2017 |
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Autoria: |
THOMPSON, I. P.; COOK, K. A.; LETHBRIDGE, G.; BURNS, R. G. |
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Título: |
Survival of two ecologically distinct bacteria (Flavobacterium and Arthrobacter) in unplanted and rhizosphere soil: laboratory studies. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Soil Biology and Biochemistry, v.22, n.8, p.1029-1037, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
The survival of two ecologically distinct bacteria was studied for up to 100 days in laboratory soil microcosms. A triple antibiotic resistant Flavobacterium (P25; km, sm, rif) was chosen as an example of "zymogenous" bacteria, defined as those which grow rapidly when simple nutrient sources are readily available. For comparison, a single antibiotic and methyl red resistant Arthrobacter strain (A 109; sm) was selected as an example of "autochthonous" bacteria which are defined as those members of the soil microflora which lend to be present in constant numbers and show low but consistent levels of activity. A 109 survived longer and in greater numbers than did P25 in both non-sterile unplanted (A109 t90=41.2 days, t99=>100 days; P25 t90 = 4.8 days, t99 = > 100 days; P25 t90 = 2.8 days) and rhizosphere soil (A109 t90 = 8.0 days, t99 = 78.2 days, t99 => 100 days; P25 t90 = 2.8 days, t99 = 5.3 days, t99.9 = 9.0 days, BQL = 60.0 days); where t90, t99, t99.9 represents the real or extrapolated time for the population to decrease to 90%, 99% and 99,9% of the original inoculum density (4.0 x 10 g-1 soil) and BQL is below quantifiable limits (<1.0 x 10 g-1 soil). NUmbers of P25 fell BQL in non-sterile soil 12 days after introduction. Althrough P25 survived longer in the rhizosphere and rhizoplane than id did in unplanted soil, its numbers still fell to BQL within 60.0 and 41.3 days, respectively. Both organisms survived better in heat-sterilized than non-sterile soil, suggesting that inoculum death in non-sterile soil was due to competition from and predation by the indigenous community plus a lack of soluble nutrients. The presence of an estlablished inoculum reduced the survival of a second introduced bacterium, most noticeably when P25 was introduced 21 days after A109. Starving the culture or growing it under nutrient limiting conditions prior to introduction to soil affected survival of P25 but not A 109. MenosThe survival of two ecologically distinct bacteria was studied for up to 100 days in laboratory soil microcosms. A triple antibiotic resistant Flavobacterium (P25; km, sm, rif) was chosen as an example of "zymogenous" bacteria, defined as those which grow rapidly when simple nutrient sources are readily available. For comparison, a single antibiotic and methyl red resistant Arthrobacter strain (A 109; sm) was selected as an example of "autochthonous" bacteria which are defined as those members of the soil microflora which lend to be present in constant numbers and show low but consistent levels of activity. A 109 survived longer and in greater numbers than did P25 in both non-sterile unplanted (A109 t90=41.2 days, t99=>100 days; P25 t90 = 4.8 days, t99 = > 100 days; P25 t90 = 2.8 days) and rhizosphere soil (A109 t90 = 8.0 days, t99 = 78.2 days, t99 => 100 days; P25 t90 = 2.8 days, t99 = 5.3 days, t99.9 = 9.0 days, BQL = 60.0 days); where t90, t99, t99.9 represents the real or extrapolated time for the population to decrease to 90%, 99% and 99,9% of the original inoculum density (4.0 x 10 g-1 soil) and BQL is below quantifiable limits (<1.0 x 10 g-1 soil). NUmbers of P25 fell BQL in non-sterile soil 12 days after introduction. Althrough P25 survived longer in the rhizosphere and rhizoplane than id did in unplanted soil, its numbers still fell to BQL within 60.0 and 41.3 days, respectively. Both organisms survived better in heat-sterilized than non-sterile soil, suggesting tha... Mostrar Tudo |
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Palavras-Chave: |
Microorganism; Microorganismo. |
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Thesagro: |
Bactéria; Solo. |
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Thesaurus Nal: |
Arthrobacter; Flavobacterium; soil. |
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Categoria do assunto: |
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Marc: |
LEADER 02641naa a2200241 a 4500
001 1790869
005 2017-03-31
008 1990 bl --- 0-- u #d
100 1 $aTHOMPSON, I. P.
245 $aSurvival of two ecologically distinct bacteria (Flavobacterium and Arthrobacter) in unplanted and rhizosphere soil$blaboratory studies.
260 $c1990
520 $aThe survival of two ecologically distinct bacteria was studied for up to 100 days in laboratory soil microcosms. A triple antibiotic resistant Flavobacterium (P25; km, sm, rif) was chosen as an example of "zymogenous" bacteria, defined as those which grow rapidly when simple nutrient sources are readily available. For comparison, a single antibiotic and methyl red resistant Arthrobacter strain (A 109; sm) was selected as an example of "autochthonous" bacteria which are defined as those members of the soil microflora which lend to be present in constant numbers and show low but consistent levels of activity. A 109 survived longer and in greater numbers than did P25 in both non-sterile unplanted (A109 t90=41.2 days, t99=>100 days; P25 t90 = 4.8 days, t99 = > 100 days; P25 t90 = 2.8 days) and rhizosphere soil (A109 t90 = 8.0 days, t99 = 78.2 days, t99 => 100 days; P25 t90 = 2.8 days, t99 = 5.3 days, t99.9 = 9.0 days, BQL = 60.0 days); where t90, t99, t99.9 represents the real or extrapolated time for the population to decrease to 90%, 99% and 99,9% of the original inoculum density (4.0 x 10 g-1 soil) and BQL is below quantifiable limits (<1.0 x 10 g-1 soil). NUmbers of P25 fell BQL in non-sterile soil 12 days after introduction. Althrough P25 survived longer in the rhizosphere and rhizoplane than id did in unplanted soil, its numbers still fell to BQL within 60.0 and 41.3 days, respectively. Both organisms survived better in heat-sterilized than non-sterile soil, suggesting that inoculum death in non-sterile soil was due to competition from and predation by the indigenous community plus a lack of soluble nutrients. The presence of an estlablished inoculum reduced the survival of a second introduced bacterium, most noticeably when P25 was introduced 21 days after A109. Starving the culture or growing it under nutrient limiting conditions prior to introduction to soil affected survival of P25 but not A 109.
650 $aArthrobacter
650 $aFlavobacterium
650 $asoil
650 $aBactéria
650 $aSolo
653 $aMicroorganism
653 $aMicroorganismo
700 1 $aCOOK, K. A.
700 1 $aLETHBRIDGE, G.
700 1 $aBURNS, R. G.
773 $tSoil Biology and Biochemistry$gv.22, n.8, p.1029-1037, 1990.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Origem |
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Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
26/09/2005 |
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Data da última atualização: |
26/02/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
PENA, E. de A.; CHAVES, F. C. M.; COSTA, I. O. V. L.; PINTO, A. C. da S.; POHLIT, A. M. |
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Afiliação: |
Embrapa Amazônia Ocidental.; FRANCISCO CELIO MAIA CHAVES, CPAA. |
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Título: |
Produção de mudas de caapeba em diferentes substratos. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE OLERICULTURA, 45.; CONGRESSO BRASILEIRO DE FLORICULTURA E PLANTAS ORNAMENTAIS, 15.; CONGRESSO BRASILEIRO DE CULTURA DE TECIDOS DE PLANTAS, 2., 2005, Fortaleza. [Resumos]. Horticultura Brasileira, Brasília, v. 23, n. 2, p. 499, ago. 2005. Suplemento. |
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Idioma: |
Português |
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Notas: |
Resumo 907. |
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Conteúdo: |
Avaliou-se o efeito de diferentes substratos na produção de mudas de caapeba, na Embrapa Amazônia Ocidental, em 2004/2005, com os tratamentos: T1: Plantimax?; T2: Turfa; T3: ¼ terriço (solo da camada superficial, até 10 cm, rico em matéria orgânica) + ¾ carvão; T4: ¼ terriço + ¾ casca de guaraná; T5: ¼ terriço + ¼ esterco de gado curtido + ½ casca de guaraná; T6: ¼ terriço + ¼ esterco de gado curtido + ½ casca de arroz carbonizada; T7: ¼ terriço + ¼ esterco de gado curtido + ¼ carvão + ¼ casca de guaraná; T8: ¼ terriço + ¼ esterco de gado curtido + ¼ casca de arroz carbonizada + ¼ casca de guaraná. |
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Palavras-Chave: |
Casca de guaraná; Pothomorphe peltata; Propagação; Substrato. |
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Thesagro: |
Caapeba; Muda; Planta Medicinal. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/160464/1/HortBra.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/124912/1/horticulBras906.pdf
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Marc: |
LEADER 01549nam a2200253 a 4500
001 1676255
005 2019-02-26
008 2005 bl uuuu u00u1 u #d
100 1 $aPENA, E. de A.
245 $aProdução de mudas de caapeba em diferentes substratos.
260 $aIn: CONGRESSO BRASILEIRO DE OLERICULTURA, 45.; CONGRESSO BRASILEIRO DE FLORICULTURA E PLANTAS ORNAMENTAIS, 15.; CONGRESSO BRASILEIRO DE CULTURA DE TECIDOS DE PLANTAS, 2., 2005, Fortaleza. [Resumos]. Horticultura Brasileira, Brasília, v. 23, n. 2, p. 499, ago. 2005. Suplemento.$c2005
500 $aResumo 907.
520 $aAvaliou-se o efeito de diferentes substratos na produção de mudas de caapeba, na Embrapa Amazônia Ocidental, em 2004/2005, com os tratamentos: T1: Plantimax?; T2: Turfa; T3: ¼ terriço (solo da camada superficial, até 10 cm, rico em matéria orgânica) + ¾ carvão; T4: ¼ terriço + ¾ casca de guaraná; T5: ¼ terriço + ¼ esterco de gado curtido + ½ casca de guaraná; T6: ¼ terriço + ¼ esterco de gado curtido + ½ casca de arroz carbonizada; T7: ¼ terriço + ¼ esterco de gado curtido + ¼ carvão + ¼ casca de guaraná; T8: ¼ terriço + ¼ esterco de gado curtido + ¼ casca de arroz carbonizada + ¼ casca de guaraná.
650 $aCaapeba
650 $aMuda
650 $aPlanta Medicinal
653 $aCasca de guaraná
653 $aPothomorphe peltata
653 $aPropagação
653 $aSubstrato
700 1 $aCHAVES, F. C. M.
700 1 $aCOSTA, I. O. V. L.
700 1 $aPINTO, A. C. da S.
700 1 $aPOHLIT, A. M.
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Embrapa Amazônia Ocidental (CPAA) |
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