| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
|
Data corrente: |
22/11/2002 |
|
Data da última atualização: |
22/11/2002 |
|
Autoria: |
WALLACE, J. M.; BOURKE, D. A.; AITKEN, R. P.; CRUICKSHANK, M. A. |
|
Título: |
Switching maternal dietary intake at the end of the first trimester has profound effects on placental development and fetal growth in adolescent ewes carrying singleton fetuses. |
|
Ano de publicação: |
1999 |
|
Fonte/Imprenta: |
Biology of Reproduction and Fertility, v. 61, n. 1, p. 101-110, 1999. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The aim was to investigate whether placental growth and hence pregnancy outcome could be altered by switching adolescent dams from a high to a moderate nutrient intake, and vice-versa, at lhe end of lhe first trimester. Embryos recovered from adult ewes inseminated by a single sire were transferred in singleton to peripubertal adolescents. After transfer, adolescent ewes were offered a high (H, n = 33) or moderate (M, n = 32) level of a diet calculated to promote rapid or moderate maternal growth rates, respectively. At Day 50 of gestation, half lhe ewes had their dietary intakes switched, yielding 4 treatment groups: HH, MM, HM, and MH. A subset of ewes were killed at Day 104 of gestation to determine maternal body composition in relation to growth of lhe products of conception. Maternal body composition measurements revealed that lhe higher live weight . in the high-intake dams was predominantly due to an increase in body fat deposition, with a less pronounced increase in body protein. At Day 104, HH and MH groups (high intake during second trimester) compared with MM and HM groups (moderate intake during second trimester) had a lower (p < 0.002) total fetal cotyledon weight; but fetal weight, conformation, and individual organ weights were not significantly influenced by maternal dietary intake. In ewes delivering live young at term, a high plane of nutrition from lhe end of lhe first trimester (HH and MH groups) compared with moderate levels (MM and HM groups) was associated with a reduction in gestation length (p < 0.009), total placental weight (p < 0.002), total fetal cotyledon weight (p < 0.001), and mean fetal cotyledon weight per placenta (p < 0.001). Fetal cotyledon number was dependent on maternal dietary intake during lhe first trimester only and was lower (p < 0.007) in HH and HM ewes compared to MM and MH ewes. The inhibition of fetal cotyledon growth in HH and MH groups was associated with a major decrease (p < 0.001) in lamb birth weight at term relative to lhe MM and HM groups. Thus, reducing maternal dietary intake from a high to a moderate level at lhe end of lhe first trimester stimulates placental growth and enhances pregnancy outcome, and increasing maternal dietary intake at this time point has a deleterious effect on placental development and fetal growth. MenosThe aim was to investigate whether placental growth and hence pregnancy outcome could be altered by switching adolescent dams from a high to a moderate nutrient intake, and vice-versa, at lhe end of lhe first trimester. Embryos recovered from adult ewes inseminated by a single sire were transferred in singleton to peripubertal adolescents. After transfer, adolescent ewes were offered a high (H, n = 33) or moderate (M, n = 32) level of a diet calculated to promote rapid or moderate maternal growth rates, respectively. At Day 50 of gestation, half lhe ewes had their dietary intakes switched, yielding 4 treatment groups: HH, MM, HM, and MH. A subset of ewes were killed at Day 104 of gestation to determine maternal body composition in relation to growth of lhe products of conception. Maternal body composition measurements revealed that lhe higher live weight . in the high-intake dams was predominantly due to an increase in body fat deposition, with a less pronounced increase in body protein. At Day 104, HH and MH groups (high intake during second trimester) compared with MM and HM groups (moderate intake during second trimester) had a lower (p < 0.002) total fetal cotyledon weight; but fetal weight, conformation, and individual organ weights were not significantly influenced by maternal dietary intake. In ewes delivering live young at term, a high plane of nutrition from lhe end of lhe first trimester (HH and MH groups) compared with moderate levels (MM and HM groups) was associ... Mostrar Tudo |
|
Palavras-Chave: |
Desenvolvimento embrionário; Dieta alimentar. |
|
Thesagro: |
Consumo; Crescimento; Ovino; Reprodução Animal. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 03088naa a2200229 a 4500
001 1528880
005 2002-11-22
008 1999 bl uuuu u00u1 u #d
100 1 $aWALLACE, J. M.
245 $aSwitching maternal dietary intake at the end of the first trimester has profound effects on placental development and fetal growth in adolescent ewes carrying singleton fetuses.
260 $c1999
520 $aThe aim was to investigate whether placental growth and hence pregnancy outcome could be altered by switching adolescent dams from a high to a moderate nutrient intake, and vice-versa, at lhe end of lhe first trimester. Embryos recovered from adult ewes inseminated by a single sire were transferred in singleton to peripubertal adolescents. After transfer, adolescent ewes were offered a high (H, n = 33) or moderate (M, n = 32) level of a diet calculated to promote rapid or moderate maternal growth rates, respectively. At Day 50 of gestation, half lhe ewes had their dietary intakes switched, yielding 4 treatment groups: HH, MM, HM, and MH. A subset of ewes were killed at Day 104 of gestation to determine maternal body composition in relation to growth of lhe products of conception. Maternal body composition measurements revealed that lhe higher live weight . in the high-intake dams was predominantly due to an increase in body fat deposition, with a less pronounced increase in body protein. At Day 104, HH and MH groups (high intake during second trimester) compared with MM and HM groups (moderate intake during second trimester) had a lower (p < 0.002) total fetal cotyledon weight; but fetal weight, conformation, and individual organ weights were not significantly influenced by maternal dietary intake. In ewes delivering live young at term, a high plane of nutrition from lhe end of lhe first trimester (HH and MH groups) compared with moderate levels (MM and HM groups) was associated with a reduction in gestation length (p < 0.009), total placental weight (p < 0.002), total fetal cotyledon weight (p < 0.001), and mean fetal cotyledon weight per placenta (p < 0.001). Fetal cotyledon number was dependent on maternal dietary intake during lhe first trimester only and was lower (p < 0.007) in HH and HM ewes compared to MM and MH ewes. The inhibition of fetal cotyledon growth in HH and MH groups was associated with a major decrease (p < 0.001) in lamb birth weight at term relative to lhe MM and HM groups. Thus, reducing maternal dietary intake from a high to a moderate level at lhe end of lhe first trimester stimulates placental growth and enhances pregnancy outcome, and increasing maternal dietary intake at this time point has a deleterious effect on placental development and fetal growth.
650 $aConsumo
650 $aCrescimento
650 $aOvino
650 $aReprodução Animal
653 $aDesenvolvimento embrionário
653 $aDieta alimentar
700 1 $aBOURKE, D. A.
700 1 $aAITKEN, R. P.
700 1 $aCRUICKSHANK, M. A.
773 $tBiology of Reproduction and Fertility$gv. 61, n. 1, p. 101-110, 1999.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Hortaliças. |
|
Data corrente: |
11/08/2022 |
|
Data da última atualização: |
12/08/2022 |
|
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
|
Autoria: |
MADEIRA, N. R.; KINUPP, V. F. |
|
Afiliação: |
NUNO RODRIGO MADEIRA, CNPH; VALDELY FERREIRA KINUPP, INSTITUTO FEDERAL DO AMAZONAS. |
|
Título: |
Portulaca oleracea: beldroega. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
In: CORADIN, L.; CAMILLO, J.; VIEIRA, I. C. G. (ed.). Espécies nativas da flora brasileira de valor econômico atual ou potencial: plantas para o futuro: região Norte. Brasília, DF: MMA, 2022. |
|
Páginas: |
p. 457-465. |
|
Série: |
(Série Biodiversidade, 53). |
|
Idioma: |
Português |
|
Conteúdo: |
Família. Espécie. Sinonímia. Nomes populares. Características botânicas. Distribuição geográfica. Hábitat. Uso econômico atual ou potencial. Partes usadas. Aspectos ecológicos, agronômicos e silviculturais para o cultivo. Propagação. Experiências relevantes com a espécie. Situação de conservação da espécie. Perspectivas e recomendações. |
|
Thesagro: |
Beldroega; Planta Exótica; Portulaca Oleracea. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1145381/1/Cap-LV-MMA-2022-Madeira-Beldroega.pdf
|
|
Marc: |
LEADER 01030naa a2200193 a 4500
001 2145381
005 2022-08-12
008 2022 bl uuuu u00u1 u #d
100 1 $aMADEIRA, N. R.
245 $aPortulaca oleracea$bbeldroega.$h[electronic resource]
260 $c2022
300 $ap. 457-465.
490 $a(Série Biodiversidade, 53).
520 $aFamília. Espécie. Sinonímia. Nomes populares. Características botânicas. Distribuição geográfica. Hábitat. Uso econômico atual ou potencial. Partes usadas. Aspectos ecológicos, agronômicos e silviculturais para o cultivo. Propagação. Experiências relevantes com a espécie. Situação de conservação da espécie. Perspectivas e recomendações.
650 $aBeldroega
650 $aPlanta Exótica
650 $aPortulaca Oleracea
700 1 $aKINUPP, V. F.
773 $tIn: CORADIN, L.; CAMILLO, J.; VIEIRA, I. C. G. (ed.). Espécies nativas da flora brasileira de valor econômico atual ou potencial: plantas para o futuro: região Norte. Brasília, DF: MMA, 2022.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Hortaliças (CNPH) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
