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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Pesca e Aquicultura. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
Data corrente: |
04/10/2018 |
Data da última atualização: |
29/11/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
KIRSCHNIK, L. N. G.; FRANCESCHINI-VICENTINI, I. B.; PAES, M. do C. F.; NAKAGHI, L. S. O. |
Afiliação: |
LUCIANA NAKAGHI GANECO KIRSCHNIK, CNPASA; IRENE BASTOS FRANCESCHINI-VICENTINI, UNESP, Jaboticabal-SP; MARIA DO CARMO FARIA PAES, UNESP, Jaboticabal-SP; LAURA SATIKO OKADA NAKAGHI, UNESP, Jaboticabal-SP. |
Título: |
Embryonic development of teleost Brycon orbignyanus. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Zygote, v. 26, n. 4, p. 294-300, Aug. 2018. |
DOI: |
10.1017/S0967199418000229 |
Idioma: |
Inglês |
Conteúdo: |
Brycon orbignyanus is an important large teleost that is currently on the list of endangered species, therefore studies on its reproductive biology and embryology are fundamental to help species conservation and recovery. The objective of this research was to characterize the events that occur during extrusion, fertilization and embryonic development of the species. The samples were collected at predetermined times, fixed and processed for light microscopy and scanning electron microscopy. The greenish oocytes were spherical, had translucent chorion and a mean diameter of 1.3±0.11 mm. The eggs had well defined animal and vegetative poles approximately 18 min post-fertilization. Stages from 2 to 128 blastomeres occurred between 20 min and 3 h post-fertilization (hPF), when the morula was characterized. The blastula stage was observed between 2 and 3 hPF, and the gastrula between 3 and 7 hPF, when the embryonic shield emerged and the cellular migration with the consequent formation of epiblast and hypoblast. At 8 hPF, the formation of the neural tube, above the notochord and the encephalic region, was observed, delimiting the forebrain, mesencephalon and rhombencephalon regions. From 11 hPF onward, the optic vesicle was formed close to the forebrain and the embryo tail was well developed. The optic vesicle was observed from 12 hPF onward, and the tail showed an intense movement that culminated with the rupture of the chorion and consequent hatching of the larva at 13 hPF and 27°C. MenosBrycon orbignyanus is an important large teleost that is currently on the list of endangered species, therefore studies on its reproductive biology and embryology are fundamental to help species conservation and recovery. The objective of this research was to characterize the events that occur during extrusion, fertilization and embryonic development of the species. The samples were collected at predetermined times, fixed and processed for light microscopy and scanning electron microscopy. The greenish oocytes were spherical, had translucent chorion and a mean diameter of 1.3±0.11 mm. The eggs had well defined animal and vegetative poles approximately 18 min post-fertilization. Stages from 2 to 128 blastomeres occurred between 20 min and 3 h post-fertilization (hPF), when the morula was characterized. The blastula stage was observed between 2 and 3 hPF, and the gastrula between 3 and 7 hPF, when the embryonic shield emerged and the cellular migration with the consequent formation of epiblast and hypoblast. At 8 hPF, the formation of the neural tube, above the notochord and the encephalic region, was observed, delimiting the forebrain, mesencephalon and rhombencephalon regions. From 11 hPF onward, the optic vesicle was formed close to the forebrain and the embryo tail was well developed. The optic vesicle was observed from 12 hPF onward, and the tail showed an intense movement that culminated with the rupture of the chorion and consequent hatching of the larva at 13 hPF and 2... Mostrar Tudo |
Thesagro: |
Brycon Orbignyanus; Histologia Animal; Peixe; Reprodução Animal. |
Thesaurus Nal: |
Embryology; Fish; Histology; Reproduction; Ultrastructure. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02275naa a2200277 a 4500 001 2096898 005 2018-11-29 008 2018 bl uuuu u00u1 u #d 024 7 $a10.1017/S0967199418000229$2DOI 100 1 $aKIRSCHNIK, L. N. G. 245 $aEmbryonic development of teleost Brycon orbignyanus.$h[electronic resource] 260 $c2018 520 $aBrycon orbignyanus is an important large teleost that is currently on the list of endangered species, therefore studies on its reproductive biology and embryology are fundamental to help species conservation and recovery. The objective of this research was to characterize the events that occur during extrusion, fertilization and embryonic development of the species. The samples were collected at predetermined times, fixed and processed for light microscopy and scanning electron microscopy. The greenish oocytes were spherical, had translucent chorion and a mean diameter of 1.3±0.11 mm. The eggs had well defined animal and vegetative poles approximately 18 min post-fertilization. Stages from 2 to 128 blastomeres occurred between 20 min and 3 h post-fertilization (hPF), when the morula was characterized. The blastula stage was observed between 2 and 3 hPF, and the gastrula between 3 and 7 hPF, when the embryonic shield emerged and the cellular migration with the consequent formation of epiblast and hypoblast. At 8 hPF, the formation of the neural tube, above the notochord and the encephalic region, was observed, delimiting the forebrain, mesencephalon and rhombencephalon regions. From 11 hPF onward, the optic vesicle was formed close to the forebrain and the embryo tail was well developed. The optic vesicle was observed from 12 hPF onward, and the tail showed an intense movement that culminated with the rupture of the chorion and consequent hatching of the larva at 13 hPF and 27°C. 650 $aEmbryology 650 $aFish 650 $aHistology 650 $aReproduction 650 $aUltrastructure 650 $aBrycon Orbignyanus 650 $aHistologia Animal 650 $aPeixe 650 $aReprodução Animal 700 1 $aFRANCESCHINI-VICENTINI, I. B. 700 1 $aPAES, M. do C. F. 700 1 $aNAKAGHI, L. S. O. 773 $tZygote$gv. 26, n. 4, p. 294-300, Aug. 2018.
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Embrapa Pesca e Aquicultura (CNPASA) |
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![](/consulta/web/img/deny.png) | 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: |
03/09/2007 |
Data da última atualização: |
13/02/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
ORTIZ-CEBALLOS, A. I.; PEÑA-CABRIALES, J. J.; FRAGOSO, C.; BROWN, G. G. |
Afiliação: |
Angel I. Ortiz-Ceballos, Universidad Veracruzana - Laboratorio de Biotecnología y Ecología Aplicada; Juan J. Peña-Cabriales, CINVESTAV - Departamento de Biotecnología y Bioquímica; Carlos Fragoso, Instituto de Ecologia - Departamento de Biologia de Suelos; George G. Brown, Embrapa Florestas. |
Título: |
Mycorrhizal colonization and nitrogen uptake by maize: combined effect of tropical earthworms and velvetbean mulch. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Biology and Fertility of Soils, v. 44, p. 181-186, Oct. 2007. |
DOI: |
10.1007/s00374-007-0193-y |
Idioma: |
Inglês |
Notas: |
Publicado online. |
Conteúdo: |
Earthworms and mulch can have positive or negative effects on mycorrhizae (fungus-roots) and N uptake by plants. In the present experiment, maize plants were grown under greenhouse conditions with or without tropical earthworms (Balanteodrilus pearsei) and mulch of velvetbean (Mucuna pruriens var. utilis). The formation of vesicles and hyphae of arbuscular-mycorrhizal (AM) fungi in roots and N uptake by maize plants was measured at harvest. The addition of earthworms and velvetbean reduced AM root colonization. Earthworms had no effect on plant root or shoot biomass. In the absence of velvetbean, earthworms reduced AM colonization, but when velvetbean was present, this effect disappeared. The addition of velvetbean mulch, on the other hand, had an effect on plant biomass (above- and belowground) and a positive effect on AM fungal colonization of roots in presence of worms, but a negative effect when worms were absent. When both M. pruriens and B. pearsei were added, shoot and root biomass and N concentrations increased. Vesicle formation was related to velvetbean mulch decomposition as well as the higher N concentration in maize roots. Management of mulch–earthworm interactions may be of value, particularly in low-input and organic agricultural systems, and deserves further investigation. |
Thesagro: |
Micorriza; Minhoca; Nitrogênio. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01997naa a2200217 a 4500 001 1313354 005 2015-02-13 008 2007 bl uuuu u00u1 u #d 024 7 $a10.1007/s00374-007-0193-y$2DOI 100 1 $aORTIZ-CEBALLOS, A. I. 245 $aMycorrhizal colonization and nitrogen uptake by maize$bcombined effect of tropical earthworms and velvetbean mulch.$h[electronic resource] 260 $c2007 500 $aPublicado online. 520 $aEarthworms and mulch can have positive or negative effects on mycorrhizae (fungus-roots) and N uptake by plants. In the present experiment, maize plants were grown under greenhouse conditions with or without tropical earthworms (Balanteodrilus pearsei) and mulch of velvetbean (Mucuna pruriens var. utilis). The formation of vesicles and hyphae of arbuscular-mycorrhizal (AM) fungi in roots and N uptake by maize plants was measured at harvest. The addition of earthworms and velvetbean reduced AM root colonization. Earthworms had no effect on plant root or shoot biomass. In the absence of velvetbean, earthworms reduced AM colonization, but when velvetbean was present, this effect disappeared. The addition of velvetbean mulch, on the other hand, had an effect on plant biomass (above- and belowground) and a positive effect on AM fungal colonization of roots in presence of worms, but a negative effect when worms were absent. When both M. pruriens and B. pearsei were added, shoot and root biomass and N concentrations increased. Vesicle formation was related to velvetbean mulch decomposition as well as the higher N concentration in maize roots. Management of mulch–earthworm interactions may be of value, particularly in low-input and organic agricultural systems, and deserves further investigation. 650 $aMicorriza 650 $aMinhoca 650 $aNitrogênio 700 1 $aPEÑA-CABRIALES, J. J. 700 1 $aFRAGOSO, C. 700 1 $aBROWN, G. G. 773 $tBiology and Fertility of Soils$gv. 44, p. 181-186, Oct. 2007.
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