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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
23/07/1997 |
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Data da última atualização: |
23/07/1997 |
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Autoria: |
MIRANDA, J. C. C. de. |
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Título: |
Effects of soil phosphorus on vesicular-arbuscular mycorrhiza in a brazilian cerrado. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
Reading: University of Reading, Maio, 1985. |
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Páginas: |
227p. |
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Série: |
Tese de Doutorado. |
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Idioma: |
Inglês |
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Notas: |
Tese de Doutorado. Orientada por: P.J.Harris. |
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Conteúdo: |
The direct effects of soil P on VA mycorrhizal fungi and VA micorrhiza development were investigated. An attempt was made to identify whether soil P or plant P is the promary factor controlling VA micorrhiza formation, by means of a split-root experiment with sorghum plants inoculated with Glomus macrocarpus and three phosphate levels. At low soil P, low plant P did not affect VA mycorrhizal root infection and external mycelium content. However, high plant P depressed root infection, but did not affect the external mycelium content to the same extent. At high soil P both parameters were similarly reduced. The direct effects of soil P on the VA endophyte Glomus macrocarpus were investigated in a cellophane-soil agar plate experiment. Spore germination and mycellium growth measured at ten different phosphate levels and three periods of incubation were independently affected by the P status of the soil. Both parameters were stimulated when 12.5 microgramas P.g-1 was applied to the soil and decreased with further soil P increments. At high soil P treatments spore germination became less sensitive to changes in P concentrations. The direct effects of soil P on different species of VA mycorrhizal fungi were also investigated. The VA endophytes, Glomus macrocarpus, Gigaspora heterogama and Glomus fasciculatus had different sensitivities to the P status of the soil. Spore germination was higher and mycelium growth more profuse for Gigaspora heterogama. However, the latter was more sensitive to phosphorus fertilization..... MenosThe direct effects of soil P on VA mycorrhizal fungi and VA micorrhiza development were investigated. An attempt was made to identify whether soil P or plant P is the promary factor controlling VA micorrhiza formation, by means of a split-root experiment with sorghum plants inoculated with Glomus macrocarpus and three phosphate levels. At low soil P, low plant P did not affect VA mycorrhizal root infection and external mycelium content. However, high plant P depressed root infection, but did not affect the external mycelium content to the same extent. At high soil P both parameters were similarly reduced. The direct effects of soil P on the VA endophyte Glomus macrocarpus were investigated in a cellophane-soil agar plate experiment. Spore germination and mycellium growth measured at ten different phosphate levels and three periods of incubation were independently affected by the P status of the soil. Both parameters were stimulated when 12.5 microgramas P.g-1 was applied to the soil and decreased with further soil P increments. At high soil P treatments spore germination became less sensitive to changes in P concentrations. The direct effects of soil P on different species of VA mycorrhizal fungi were also investigated. The VA endophytes, Glomus macrocarpus, Gigaspora heterogama and Glomus fasciculatus had different sensitivities to the P status of the soil. Spore germination was higher and mycelium growth more profuse for Gigaspora heterogama. However, the latter was more s... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Micorriza vesicular-arbuscular; P. |
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Thesagro: |
Fertilizante; Fósforo; Solo. |
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Thesaurus Nal: |
Brazil; fertilizers; phosphorus; soil; vesicular arbuscular mycorrhizae. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02307nam a2200277 a 4500
001 1621906
005 1997-07-23
008 1985 bl uuuu m 00u1 u #d
100 1 $aMIRANDA, J. C. C. de
245 $aEffects of soil phosphorus on vesicular-arbuscular mycorrhiza in a brazilian cerrado.
260 $aReading: University of Reading, Maio$c1985
300 $a227p.
490 $aTese de Doutorado.
500 $aTese de Doutorado. Orientada por: P.J.Harris.
520 $aThe direct effects of soil P on VA mycorrhizal fungi and VA micorrhiza development were investigated. An attempt was made to identify whether soil P or plant P is the promary factor controlling VA micorrhiza formation, by means of a split-root experiment with sorghum plants inoculated with Glomus macrocarpus and three phosphate levels. At low soil P, low plant P did not affect VA mycorrhizal root infection and external mycelium content. However, high plant P depressed root infection, but did not affect the external mycelium content to the same extent. At high soil P both parameters were similarly reduced. The direct effects of soil P on the VA endophyte Glomus macrocarpus were investigated in a cellophane-soil agar plate experiment. Spore germination and mycellium growth measured at ten different phosphate levels and three periods of incubation were independently affected by the P status of the soil. Both parameters were stimulated when 12.5 microgramas P.g-1 was applied to the soil and decreased with further soil P increments. At high soil P treatments spore germination became less sensitive to changes in P concentrations. The direct effects of soil P on different species of VA mycorrhizal fungi were also investigated. The VA endophytes, Glomus macrocarpus, Gigaspora heterogama and Glomus fasciculatus had different sensitivities to the P status of the soil. Spore germination was higher and mycelium growth more profuse for Gigaspora heterogama. However, the latter was more sensitive to phosphorus fertilization.....
650 $aBrazil
650 $afertilizers
650 $aphosphorus
650 $asoil
650 $avesicular arbuscular mycorrhizae
650 $aFertilizante
650 $aFósforo
650 $aSolo
653 $aBrasil
653 $aMicorriza vesicular-arbuscular
653 $aP
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amapá. Para informações adicionais entre em contato com cpafap.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
27/01/2022 |
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Data da última atualização: |
28/01/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
SAMPAIO, F. G.; BOIJINK, C. de L.; SANTOS, L. R. B. dos; OBA, E. T.; KALININ, A. L.; LUIZ, A. J. B.; RANTIN, F. T. |
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Afiliação: |
FERNANDA GARCIA SAMPAIO, CNPASA; CHEILA DE LIMA BOIJINK, CPAA; Laila Romagueira Bichara dos Santos, USP; ELIANE TIE OBA YOSHIOKA, CPAF-AP; Ana Lúcia Kalinin, FAPESP; ALFREDO JOSE BARRETO LUIZ, CNPMA; Francisco Tadeu Rantin, FAPESP. |
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Título: |
Antioxidant defenses and biochemical changes in the neotropical fish pacu, Piaractus mesopotamicus: responses to single and combined copper and hypercarbia exposure. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Comparative Biochemistry and Physiology, Part C, New York, v. 156, n. 3-4, p. 178-186, 2012. |
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DOI: |
10.1016/j.cbpc.2012.07.002 |
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Idioma: |
Inglês |
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Conteúdo: |
This study investigated the potentially detrimental effects of copper and elevated aquatic CO2 (hypercarbia), alone or in combination, on pacu, Piaractus mesopotamicus. Fish were exposed for 48 h to control (no copper 2+ ?1addition in normocarbia), to 400 ?g Cu L , to hypercarbic (1% CO2; PCO2 = 6.9 mm Hg) water and to 400 ?g Cu2+L?1 +hypercarbia. In liver the single factors caused an increase in lipid hydroperoxide concentration that was not observed when the factors were combined. Copper exposure elicited increased hepatic superoxide dismutase activity, irrespective of aquatic CO2 level. On the other hand, the effects of copper on hepatic glutathione peroxidase activity were dependent on water CO2 levels. The two stressors combined did not affect hepatic catalase activity. Hypercarbic water caused a decline in plasma glucose concentration, but this was not observed when hypercarbia was combined with copper exposure. Copper caused a decrease in branchial Na+/K+-ATPase activity that was independent of water CO2 level. Copper caused an increase in branchial metallothionein concentration that was independent of water CO2 level. Thus, branchial metallothionein and Na+/K+ -ATPase were effective biomarkers of copper exposure that were not affected by water CO2 level. |
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Palavras-Chave: |
Antioxidantes. |
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Thesagro: |
Cobre; Dióxido de carbono; Pacu; Toxidez. |
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Thesaurus NAL: |
Antioxidant activity; Carbon dioxide; Copper; Ecotoxicology; Fish; Resistance mechanisms. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 02338naa a2200337 a 4500
001 2139391
005 2022-01-28
008 2012 bl --- 0-- u #d
024 7 $a10.1016/j.cbpc.2012.07.002$2DOI
100 1 $aSAMPAIO, F. G.
245 $aAntioxidant defenses and biochemical changes in the neotropical fish pacu, Piaractus mesopotamicus$bresponses to single and combined copper and hypercarbia exposure.$h[electronic resource]
260 $c2012
520 $aThis study investigated the potentially detrimental effects of copper and elevated aquatic CO2 (hypercarbia), alone or in combination, on pacu, Piaractus mesopotamicus. Fish were exposed for 48 h to control (no copper 2+ ?1addition in normocarbia), to 400 ?g Cu L , to hypercarbic (1% CO2; PCO2 = 6.9 mm Hg) water and to 400 ?g Cu2+L?1 +hypercarbia. In liver the single factors caused an increase in lipid hydroperoxide concentration that was not observed when the factors were combined. Copper exposure elicited increased hepatic superoxide dismutase activity, irrespective of aquatic CO2 level. On the other hand, the effects of copper on hepatic glutathione peroxidase activity were dependent on water CO2 levels. The two stressors combined did not affect hepatic catalase activity. Hypercarbic water caused a decline in plasma glucose concentration, but this was not observed when hypercarbia was combined with copper exposure. Copper caused a decrease in branchial Na+/K+-ATPase activity that was independent of water CO2 level. Copper caused an increase in branchial metallothionein concentration that was independent of water CO2 level. Thus, branchial metallothionein and Na+/K+ -ATPase were effective biomarkers of copper exposure that were not affected by water CO2 level.
650 $aAntioxidant activity
650 $aCarbon dioxide
650 $aCopper
650 $aEcotoxicology
650 $aFish
650 $aResistance mechanisms
650 $aCobre
650 $aDióxido de carbono
650 $aPacu
650 $aToxidez
653 $aAntioxidantes
700 1 $aBOIJINK, C. de L.
700 1 $aSANTOS, L. R. B. dos
700 1 $aOBA, E. T.
700 1 $aKALININ, A. L.
700 1 $aLUIZ, A. J. B.
700 1 $aRANTIN, F. T.
773 $tComparative Biochemistry and Physiology, Part C, New York$gv. 156, n. 3-4, p. 178-186, 2012.
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