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Registro Completo |
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
20/03/2013 |
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Data da última atualização: |
20/03/2013 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
GRINBERG, P. da S.; CARDOSO, J. H.; BERGMANN, N. T.; VELASQUES, N. C. |
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Afiliação: |
PATRICIA DA SILVA GRINBERG, UCPEL; JOEL HENRIQUE CARDOSO, CPACT; NAGILAH TESSMER BERGMANN, UFPEL; NATHALIA CARDOSO VELASQUES, FURG. |
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Título: |
Avaliação da superação de dormência de sementes de Cupania vernalis Cambess. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
In: SEMINÁRIO INTERNACIONAL DE EDUCAÇÃO E PESQUISA EM ECOLOGIA, 3., 2012, Pelotas, RS. Anais... Pelotas: Universidade Católica de Pelotas, 2012. |
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Idioma: |
Português |
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Conteúdo: |
Cupania vernalis pertence à família Sapindaceae e é conhecida popularmente como camboatá. Suas sementes apresentam alto teor de umidade e são classificadas como recalcitrantes. Frente à dificuldade de armazenagem e na busca por métodos que acelerem a germinação e emergência, submeteu-se as sementes a diferentes tratamentos de superação de dormência. Foram testados os processos de escarificação, aquecimento em água quente a 50ºC por 5 minutos, desidratação a 40% e testemunha sem tratamento. As sementes tiveram o arilo removido antes da aplicação dos tratamentos. Para cada um dos tratamentos avaliou-se a emergência durante 30, 60 e 90 dias. O aquecimento em água quente a 50ºC por 5 minutos acelerou o processo de germinação, enquanto que o tratamento desidratação apresentou a menor emergência absoluta, ainda que não tenha provocado a total inviabilidade das sementes. Abstract: Cupania vernalis belongs to the family Sapindaceae and it is known than camboatá. Their seeds have high moisture content and are classified as recalcitrant. Facing the difficulty of storing and for methods to speed up germination and emergence, underwent the seeds to different treatments. Scarification, heating in hot water at 50ºc for 5 minutes, dehydration to 40% and control without treatment where tested. The seeds had the aril removed before application the treatments. For each one of the treatments was evaluated at 30, 60 and emergencies during 90 days. Heating in hot water at 50ºc for 5 minutes accelerated the process of germination, while treating dehydration presented the lowest absolute emergency, even though it has not caused the total impracticality of the seeds. MenosCupania vernalis pertence à família Sapindaceae e é conhecida popularmente como camboatá. Suas sementes apresentam alto teor de umidade e são classificadas como recalcitrantes. Frente à dificuldade de armazenagem e na busca por métodos que acelerem a germinação e emergência, submeteu-se as sementes a diferentes tratamentos de superação de dormência. Foram testados os processos de escarificação, aquecimento em água quente a 50ºC por 5 minutos, desidratação a 40% e testemunha sem tratamento. As sementes tiveram o arilo removido antes da aplicação dos tratamentos. Para cada um dos tratamentos avaliou-se a emergência durante 30, 60 e 90 dias. O aquecimento em água quente a 50ºC por 5 minutos acelerou o processo de germinação, enquanto que o tratamento desidratação apresentou a menor emergência absoluta, ainda que não tenha provocado a total inviabilidade das sementes. Abstract: Cupania vernalis belongs to the family Sapindaceae and it is known than camboatá. Their seeds have high moisture content and are classified as recalcitrant. Facing the difficulty of storing and for methods to speed up germination and emergence, underwent the seeds to different treatments. Scarification, heating in hot water at 50ºc for 5 minutes, dehydration to 40% and control without treatment where tested. The seeds had the aril removed before application the treatments. For each one of the treatments was evaluated at 30, 60 and emergencies during 90 days. Heating in hot water at 50ºc for 5 minutes acce... Mostrar Tudo |
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Thesagro: |
Camboatá; Cupania Vernalis; Dormência. |
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Categoria do assunto: |
-- |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/953566/1/0000005487AVALIACAODASUPERACAODEDORMENCIADESEMENTESDECupaniavernalisCambess.pdf
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Marc: |
LEADER 02345nam a2200181 a 4500
001 1953566
005 2013-03-20
008 2012 bl uuuu u00u1 u #d
100 1 $aGRINBERG, P. da S.
245 $aAvaliação da superação de dormência de sementes de Cupania vernalis Cambess.$h[electronic resource]
260 $aIn: SEMINÁRIO INTERNACIONAL DE EDUCAÇÃO E PESQUISA EM ECOLOGIA, 3., 2012, Pelotas, RS. Anais... Pelotas: Universidade Católica de Pelotas$c2012
520 $aCupania vernalis pertence à família Sapindaceae e é conhecida popularmente como camboatá. Suas sementes apresentam alto teor de umidade e são classificadas como recalcitrantes. Frente à dificuldade de armazenagem e na busca por métodos que acelerem a germinação e emergência, submeteu-se as sementes a diferentes tratamentos de superação de dormência. Foram testados os processos de escarificação, aquecimento em água quente a 50ºC por 5 minutos, desidratação a 40% e testemunha sem tratamento. As sementes tiveram o arilo removido antes da aplicação dos tratamentos. Para cada um dos tratamentos avaliou-se a emergência durante 30, 60 e 90 dias. O aquecimento em água quente a 50ºC por 5 minutos acelerou o processo de germinação, enquanto que o tratamento desidratação apresentou a menor emergência absoluta, ainda que não tenha provocado a total inviabilidade das sementes. Abstract: Cupania vernalis belongs to the family Sapindaceae and it is known than camboatá. Their seeds have high moisture content and are classified as recalcitrant. Facing the difficulty of storing and for methods to speed up germination and emergence, underwent the seeds to different treatments. Scarification, heating in hot water at 50ºc for 5 minutes, dehydration to 40% and control without treatment where tested. The seeds had the aril removed before application the treatments. For each one of the treatments was evaluated at 30, 60 and emergencies during 90 days. Heating in hot water at 50ºc for 5 minutes accelerated the process of germination, while treating dehydration presented the lowest absolute emergency, even though it has not caused the total impracticality of the seeds.
650 $aCamboatá
650 $aCupania Vernalis
650 $aDormência
700 1 $aCARDOSO, J. H.
700 1 $aBERGMANN, N. T.
700 1 $aVELASQUES, N. C.
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Embrapa Clima Temperado (CPACT) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
05/07/2001 |
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Data da última atualização: |
28/07/2008 |
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Autoria: |
ECKERT, B.; WEBER, O. B.; KIRCHHOF, G.; HALBRITTER, A.; STOFFELS, M.; HARTMANN, A. |
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Título: |
Azospirillum doebereinerae sp. nov., a nitrogen-fixing bacterium associated with the C4-grass Miscanthus. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
International Journal of Systematic and Evolutionary Microbiology, Reading, v. 51, p. 17-26, 2001. |
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Idioma: |
Inglês |
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Conteúdo: |
A new group of nitrogen-fixing Azospirillum sp. bacteria was isolated from the roots of the C4-gramineous plant Miscanthus. Polyphasic taxonomy was performed, including auxanography using API galleries, physiological tests and 165 rRNA sequence comparison. The ability of the isolates to fix dinitrogen was evaluated by amplification of the nifD gene, immunodetection of the dinitrogenase reductase and acetylene-reduction assay. On the basis of these results, the nitrogen-fixing isolates represent a new species within the genus Azospirillum. Its closest phylogenetic neighbours, as deduced by 165 rDNA- based analysis, are Azospirillum lipoferum, Azospirillum largimobile and Azospirillum brasilense with 96.6,96.6 and 95.9% sequence similarity, respectively. Two 165 rRNA-targeting oligonucleotide probes were developed which differentiate the new species from the other Azospirillum species by whole-cell fluorescence hybridization. Strains of the new species are curved rods or S-shaped, 1.0-1.5 /lm in width and 2.0-30 /lm in length, Gram-negative and motile with a single polar flagellum. Optimum growth occurs at 30 °C and at pH values between 6.0 and 7.0. No growth takes place at 37 °C. They have a respiratory type of metabolism, grow well on arabinose, D-fructose, gluconate, glucose, glycerol, malate, mannitol and sorbitol. They differ from A.
largimobile and A. lipoferum by their inability to use N-acetylglucosamine and D-ribose, from A. lipoferum by their ability to grow without biotin supplementation and from A. brasilense by their growth with D-mannitol and D-sorbitol as sole carbon sources. Nitrogen fixation occurs in microaerobic nitrogen-limited conditions. For this species, the name Azospirillum doebereinerae sp. nov. is suggested, with strain GSF71T as the type strain ( = DSM 13131T; reference strain Ma4 = DSM 13400). Its G+C content is 70.7 mol%. MenosA new group of nitrogen-fixing Azospirillum sp. bacteria was isolated from the roots of the C4-gramineous plant Miscanthus. Polyphasic taxonomy was performed, including auxanography using API galleries, physiological tests and 165 rRNA sequence comparison. The ability of the isolates to fix dinitrogen was evaluated by amplification of the nifD gene, immunodetection of the dinitrogenase reductase and acetylene-reduction assay. On the basis of these results, the nitrogen-fixing isolates represent a new species within the genus Azospirillum. Its closest phylogenetic neighbours, as deduced by 165 rDNA- based analysis, are Azospirillum lipoferum, Azospirillum largimobile and Azospirillum brasilense with 96.6,96.6 and 95.9% sequence similarity, respectively. Two 165 rRNA-targeting oligonucleotide probes were developed which differentiate the new species from the other Azospirillum species by whole-cell fluorescence hybridization. Strains of the new species are curved rods or S-shaped, 1.0-1.5 /lm in width and 2.0-30 /lm in length, Gram-negative and motile with a single polar flagellum. Optimum growth occurs at 30 °C and at pH values between 6.0 and 7.0. No growth takes place at 37 °C. They have a respiratory type of metabolism, grow well on arabinose, D-fructose, gluconate, glucose, glycerol, malate, mannitol and sorbitol. They differ from A.
largimobile and A. lipoferum by their inability to use N-acetylglucosamine and D-ribose, from A. lipoferum by their ability to grow without... Mostrar Tudo |
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Palavras-Chave: |
Bactéria diazotrófica; Diazotrophic bacteria. |
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Thesaurus NAL: |
Azospirillum. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02562naa a2200217 a 4500
001 1598619
005 2008-07-28
008 2001 bl --- 0-- u #d
100 1 $aECKERT, B.
245 $aAzospirillum doebereinerae sp. nov., a nitrogen-fixing bacterium associated with the C4-grass Miscanthus.
260 $c2001
520 $aA new group of nitrogen-fixing Azospirillum sp. bacteria was isolated from the roots of the C4-gramineous plant Miscanthus. Polyphasic taxonomy was performed, including auxanography using API galleries, physiological tests and 165 rRNA sequence comparison. The ability of the isolates to fix dinitrogen was evaluated by amplification of the nifD gene, immunodetection of the dinitrogenase reductase and acetylene-reduction assay. On the basis of these results, the nitrogen-fixing isolates represent a new species within the genus Azospirillum. Its closest phylogenetic neighbours, as deduced by 165 rDNA- based analysis, are Azospirillum lipoferum, Azospirillum largimobile and Azospirillum brasilense with 96.6,96.6 and 95.9% sequence similarity, respectively. Two 165 rRNA-targeting oligonucleotide probes were developed which differentiate the new species from the other Azospirillum species by whole-cell fluorescence hybridization. Strains of the new species are curved rods or S-shaped, 1.0-1.5 /lm in width and 2.0-30 /lm in length, Gram-negative and motile with a single polar flagellum. Optimum growth occurs at 30 °C and at pH values between 6.0 and 7.0. No growth takes place at 37 °C. They have a respiratory type of metabolism, grow well on arabinose, D-fructose, gluconate, glucose, glycerol, malate, mannitol and sorbitol. They differ from A. largimobile and A. lipoferum by their inability to use N-acetylglucosamine and D-ribose, from A. lipoferum by their ability to grow without biotin supplementation and from A. brasilense by their growth with D-mannitol and D-sorbitol as sole carbon sources. Nitrogen fixation occurs in microaerobic nitrogen-limited conditions. For this species, the name Azospirillum doebereinerae sp. nov. is suggested, with strain GSF71T as the type strain ( = DSM 13131T; reference strain Ma4 = DSM 13400). Its G+C content is 70.7 mol%.
650 $aAzospirillum
653 $aBactéria diazotrófica
653 $aDiazotrophic bacteria
700 1 $aWEBER, O. B.
700 1 $aKIRCHHOF, G.
700 1 $aHALBRITTER, A.
700 1 $aSTOFFELS, M.
700 1 $aHARTMANN, A.
773 $tInternational Journal of Systematic and Evolutionary Microbiology, Reading$gv. 51, p. 17-26, 2001.
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