| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
02/04/2002 |
|
Data da última atualização: |
21/05/2024 |
|
Autoria: |
PERRY, D. A.; MARGOLIS, H.; CHOQUETTE, C.; MOLINA, R.; TRAPPE, J. M. |
|
Título: |
Ectomycorrhizal mediation of competion between coniferous tree species. |
|
Ano de publicação: |
1989 |
|
Fonte/Imprenta: |
New Phytologist, New York, v. 112, n. 4, p. 501-512, 1989. |
|
Idioma: |
Inglês |
|
Conteúdo: |
To test the effect of ectomycorrhizal fungi (EMF) on interactions between host plants, Douglas-fir (Pseudotsuga menziesii) and pine (Pinus ponderosa) seedlings were grown in replacement series in pasteurized soil with: no EMF added; two EMF species added - Rhizopogon vinicolor (specific to Douglas-fir) and R. ochraceorubens (specific to pine); and four EMF species added - the two Rhizopogon species plus two host generalists, Laccaria laccata and Hebeloma crustuliniforme. A replacement series in unpasteurized forest soil was also included. Seedlings without added EMF were colonized by the greenhouse contaminant, Thelephora terrestris. Without added EMF (but with T. terrestris), the tree species mutually inhibited one another, producing relative yield totals significantly <1; with EMF added, mutual inhibition disappeared. With four EMF species added, Douglas-fir seedlings were significantly larger in mixture than in monoculture, with no corresponding decrease in the size of pine seedlings; this was due solely to seedlings with L. laccata, which apparently enhanced nitrogen (N) and phosphorus (P) uptake by Douglas-fir at the expense of luxury consumption by pine. Graphical analysis suggested that better growth of Douglas-fir in mixture with EMF added was related to improved P nutrition. Both N and P nutrition of pine was better in mixture with two than no EMF species added; there was no clear nutrient effect with four EMF species added. Results indicate that EMF can reduce competition between plant species and perhaps increase overall community P uptake. However, patterns were specific to both EMF and tree species and were quite different in unpasteurized soils. Hence generalizations about the effects of EMF on plant-plant interactions must be made cautiously. MenosTo test the effect of ectomycorrhizal fungi (EMF) on interactions between host plants, Douglas-fir (Pseudotsuga menziesii) and pine (Pinus ponderosa) seedlings were grown in replacement series in pasteurized soil with: no EMF added; two EMF species added - Rhizopogon vinicolor (specific to Douglas-fir) and R. ochraceorubens (specific to pine); and four EMF species added - the two Rhizopogon species plus two host generalists, Laccaria laccata and Hebeloma crustuliniforme. A replacement series in unpasteurized forest soil was also included. Seedlings without added EMF were colonized by the greenhouse contaminant, Thelephora terrestris. Without added EMF (but with T. terrestris), the tree species mutually inhibited one another, producing relative yield totals significantly <1; with EMF added, mutual inhibition disappeared. With four EMF species added, Douglas-fir seedlings were significantly larger in mixture than in monoculture, with no corresponding decrease in the size of pine seedlings; this was due solely to seedlings with L. laccata, which apparently enhanced nitrogen (N) and phosphorus (P) uptake by Douglas-fir at the expense of luxury consumption by pine. Graphical analysis suggested that better growth of Douglas-fir in mixture with EMF added was related to improved P nutrition. Both N and P nutrition of pine was better in mixture with two than no EMF species added; there was no clear nutrient effect with four EMF species added. Results indicate that EMF can reduce comp... Mostrar Tudo |
|
Palavras-Chave: |
Competicao; Ectomicorriza; Foliar nutrition; Mycorrhizas; Phosphorus uptake; Pines; Solo esterelizado. |
|
Thesagro: |
Pinus Ponderosa. |
|
Thesaurus Nal: |
allelopathy; biotechnology; conifers; ecology; ectomycorrhizae; forest trees; Oregon; plant competition; pot culture; Pseudotsuga menziesii; Rhizopogon; seedlings; woody plants. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02893naa a2200421 a 4500
001 1278622
005 2024-05-21
008 1989 bl uuuu u00u1 u #d
100 1 $aPERRY, D. A.
245 $aEctomycorrhizal mediation of competion between coniferous tree species.$h[electronic resource]
260 $c1989
520 $aTo test the effect of ectomycorrhizal fungi (EMF) on interactions between host plants, Douglas-fir (Pseudotsuga menziesii) and pine (Pinus ponderosa) seedlings were grown in replacement series in pasteurized soil with: no EMF added; two EMF species added - Rhizopogon vinicolor (specific to Douglas-fir) and R. ochraceorubens (specific to pine); and four EMF species added - the two Rhizopogon species plus two host generalists, Laccaria laccata and Hebeloma crustuliniforme. A replacement series in unpasteurized forest soil was also included. Seedlings without added EMF were colonized by the greenhouse contaminant, Thelephora terrestris. Without added EMF (but with T. terrestris), the tree species mutually inhibited one another, producing relative yield totals significantly <1; with EMF added, mutual inhibition disappeared. With four EMF species added, Douglas-fir seedlings were significantly larger in mixture than in monoculture, with no corresponding decrease in the size of pine seedlings; this was due solely to seedlings with L. laccata, which apparently enhanced nitrogen (N) and phosphorus (P) uptake by Douglas-fir at the expense of luxury consumption by pine. Graphical analysis suggested that better growth of Douglas-fir in mixture with EMF added was related to improved P nutrition. Both N and P nutrition of pine was better in mixture with two than no EMF species added; there was no clear nutrient effect with four EMF species added. Results indicate that EMF can reduce competition between plant species and perhaps increase overall community P uptake. However, patterns were specific to both EMF and tree species and were quite different in unpasteurized soils. Hence generalizations about the effects of EMF on plant-plant interactions must be made cautiously.
650 $aallelopathy
650 $abiotechnology
650 $aconifers
650 $aecology
650 $aectomycorrhizae
650 $aforest trees
650 $aOregon
650 $aplant competition
650 $apot culture
650 $aPseudotsuga menziesii
650 $aRhizopogon
650 $aseedlings
650 $awoody plants
650 $aPinus Ponderosa
653 $aCompeticao
653 $aEctomicorriza
653 $aFoliar nutrition
653 $aMycorrhizas
653 $aPhosphorus uptake
653 $aPines
653 $aSolo esterelizado
700 1 $aMARGOLIS, H.
700 1 $aCHOQUETTE, C.
700 1 $aMOLINA, R.
700 1 $aTRAPPE, J. M.
773 $tNew Phytologist, New York$gv. 112, n. 4, p. 501-512, 1989.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
29/12/2016 |
|
Data da última atualização: |
29/12/2017 |
|
Autoria: |
ROIER, E. C. R.; COSTA, R. L.; PIRES, M. S.; VILELA, J. A. R.; SANTOS, T. M. dos; SANTOS, H. A.; BALDANI, C. D.; MASSARD, C. L. |
|
Afiliação: |
ERICA C. R. ROIER, Universidade Severino Sombra/DMV; RENATA L. COSTA, UFRRJ; MARCUS S. PIRES, UFRRJ; JOICE A. R. VILELA, EMATER; TIAGO M. DOS SANTOS, UFRRJ; HUARRISSON A. SANTOS, UFRRJ; CRISTIANE D. BALDANI, UFRRJ; CARLOS L. MASSARD, UFRRJ. |
|
Título: |
Epidemiological survey of Neorickettsia risticii in equids from the State of Rio de Janeiro, Brazil. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 36, n. 10, p. 939-946, out. 2016. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Equine neorickettsiosis (EN), also known as Potomac Horse Fever, is a non-contagious disease caused by the bacterium Neorickettsia risticii of the Anaplasmataceae family. The objectives of this study were to detect the presence of anti-N. risticii antibodies by the indirect immunofluorescence assay (IFA) and of its DNA by qPCR in equids at high and low altitude regions in the State of Rio de Janeiro, Brazil, and to identify factors associated with seropositive equids by multiple logistic regression analysis. The frequency of anti-N. risticii antibodies was 16.05% (n=113/704). The animal age and breeding region were the factors that influenced the seropositivity rate for N. risticii in the equids (p<0.05). Equids from the lowland region had higher seropositivity (p<0.05; OR=5.87) compared to those of the mountain region. The presence of snails on the farm was a factor associated with this result (p<0.05; OR=2.88). In the lowland region, age of the animal and site of breeding were protective factors for the detection of antibodies anti-N. risticii in equids, with lower frequency of seropositivity in younger animals (p<0.05; OR=0.06) and in animals raised in dry areas (p<0.05; OR=0.22). The presence of the target DNA of N. risticii by qPCR was not observed in any of the amples ested. The existence of seropositive equids for N. risticii demonstrates a possible circulation of this agent in the studied area, and that the age related characteristics and equids breeding region are important factors regarding seropositivity in the State of Rio de Janeiro. MenosEquine neorickettsiosis (EN), also known as Potomac Horse Fever, is a non-contagious disease caused by the bacterium Neorickettsia risticii of the Anaplasmataceae family. The objectives of this study were to detect the presence of anti-N. risticii antibodies by the indirect immunofluorescence assay (IFA) and of its DNA by qPCR in equids at high and low altitude regions in the State of Rio de Janeiro, Brazil, and to identify factors associated with seropositive equids by multiple logistic regression analysis. The frequency of anti-N. risticii antibodies was 16.05% (n=113/704). The animal age and breeding region were the factors that influenced the seropositivity rate for N. risticii in the equids (p<0.05). Equids from the lowland region had higher seropositivity (p<0.05; OR=5.87) compared to those of the mountain region. The presence of snails on the farm was a factor associated with this result (p<0.05; OR=2.88). In the lowland region, age of the animal and site of breeding were protective factors for the detection of antibodies anti-N. risticii in equids, with lower frequency of seropositivity in younger animals (p<0.05; OR=0.06) and in animals raised in dry areas (p<0.05; OR=0.22). The presence of the target DNA of N. risticii by qPCR was not observed in any of the amples ested. The existence of seropositive equids for N. risticii demonstrates a possible circulation of this agent in the studied area, and that the age related characteristics and equids breeding region are i... Mostrar Tudo |
|
Palavras-Chave: |
Equids. |
|
Thesaurus NAL: |
Epidemiology; Neorickettsia risticii; Potomac horse fever; Serodiagnosis. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/152555/1/Epidemiological-survey.pdf
|
|
Marc: |
LEADER 02391naa a2200265 a 4500
001 2059631
005 2017-12-29
008 2016 bl uuuu u00u1 u #d
100 1 $aROIER, E. C. R.
245 $aEpidemiological survey of Neorickettsia risticii in equids from the State of Rio de Janeiro, Brazil.$h[electronic resource]
260 $c2016
520 $aEquine neorickettsiosis (EN), also known as Potomac Horse Fever, is a non-contagious disease caused by the bacterium Neorickettsia risticii of the Anaplasmataceae family. The objectives of this study were to detect the presence of anti-N. risticii antibodies by the indirect immunofluorescence assay (IFA) and of its DNA by qPCR in equids at high and low altitude regions in the State of Rio de Janeiro, Brazil, and to identify factors associated with seropositive equids by multiple logistic regression analysis. The frequency of anti-N. risticii antibodies was 16.05% (n=113/704). The animal age and breeding region were the factors that influenced the seropositivity rate for N. risticii in the equids (p<0.05). Equids from the lowland region had higher seropositivity (p<0.05; OR=5.87) compared to those of the mountain region. The presence of snails on the farm was a factor associated with this result (p<0.05; OR=2.88). In the lowland region, age of the animal and site of breeding were protective factors for the detection of antibodies anti-N. risticii in equids, with lower frequency of seropositivity in younger animals (p<0.05; OR=0.06) and in animals raised in dry areas (p<0.05; OR=0.22). The presence of the target DNA of N. risticii by qPCR was not observed in any of the amples ested. The existence of seropositive equids for N. risticii demonstrates a possible circulation of this agent in the studied area, and that the age related characteristics and equids breeding region are important factors regarding seropositivity in the State of Rio de Janeiro.
650 $aEpidemiology
650 $aNeorickettsia risticii
650 $aPotomac horse fever
650 $aSerodiagnosis
653 $aEquids
700 1 $aCOSTA, R. L.
700 1 $aPIRES, M. S.
700 1 $aVILELA, J. A. R.
700 1 $aSANTOS, T. M. dos
700 1 $aSANTOS, H. A.
700 1 $aBALDANI, C. D.
700 1 $aMASSARD, C. L.
773 $tPesquisa Veterinária Brasileira, Rio de Janeiro$gv. 36, n. 10, p. 939-946, out. 2016.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
