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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
24/06/1997 |
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Data da última atualização: |
24/06/1997 |
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Autoria: |
CHRISTIANSEN-WENIGER, C. |
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Título: |
Influence of Azospirillum spp. on the nitrogen supply of a gramineous host. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Wageningen: Landbouwuniversiteit, Out., 1991. |
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Páginas: |
101p. |
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Série: |
Tese de Doutorado. |
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Idioma: |
Inglês |
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Notas: |
Tese de Doutorado. Orientada por: A.J.Zehnder e J.A.van Veen. |
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Conteúdo: |
The main objectives of this study were to identify factors that control the behaviour of Azospirillum in the rhizosphere gramineous plant in order to be able to optimize the association between the bacteria and the host plants in terms of nitrogen supply to the host. Plant produced growth substances such as the auxines indole-acetic-acid (IAA) and 2,4-dichlorphenoxy-acetic-acid (2,4 D) or gibberilic acid enhance the acetylene reduction activity of a pure A.brasiliense culture. IAA and the cytocinine 6-benzylaminopurine also stimulated bacterial growth. It should be pointed out, that Azospirillum also produces IAA itself, which is often mentioned to be the reason of its plant-growth stimulating activity. When associated with living roots, the nitrogen fixation(acetylene reduction) activity of Azospirillum brasiliense is much less sensitive to the repressive influence of free oxygen and mineral nitrogen, i.e. N03 and NH4+, than in the absent of an active growing root. Potencial acetylene reduction rates varied from 10 to 550 nmol C2H4 h-1 plant-1 depending on environmental conditions. In order to be able to determine the fate of introduced Azospirillum in a soil and in the root environment A.brasiliense strains were marked by a transposon (Tn5) insertion into genome so that reisolation upon double resistance against kanamycin and rifampicin was possible. A.brasiliense::Tn5 established in the rhizosphere of an axenically grown spring wheat to cell numbers as high as 10x10x10x10x10x10 cells per gram dry rhizosphere... MenosThe main objectives of this study were to identify factors that control the behaviour of Azospirillum in the rhizosphere gramineous plant in order to be able to optimize the association between the bacteria and the host plants in terms of nitrogen supply to the host. Plant produced growth substances such as the auxines indole-acetic-acid (IAA) and 2,4-dichlorphenoxy-acetic-acid (2,4 D) or gibberilic acid enhance the acetylene reduction activity of a pure A.brasiliense culture. IAA and the cytocinine 6-benzylaminopurine also stimulated bacterial growth. It should be pointed out, that Azospirillum also produces IAA itself, which is often mentioned to be the reason of its plant-growth stimulating activity. When associated with living roots, the nitrogen fixation(acetylene reduction) activity of Azospirillum brasiliense is much less sensitive to the repressive influence of free oxygen and mineral nitrogen, i.e. N03 and NH4+, than in the absent of an active growing root. Potencial acetylene reduction rates varied from 10 to 550 nmol C2H4 h-1 plant-1 depending on environmental conditions. In order to be able to determine the fate of introduced Azospirillum in a soil and in the root environment A.brasiliense strains were marked by a transposon (Tn5) insertion into genome so that reisolation upon double resistance against kanamycin and rifampicin was possible. A.brasiliense::Tn5 established in the rhizosphere of an axenically grown spring wheat to cell numbers as high as 10x10x10x10... Mostrar Tudo |
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Palavras-Chave: |
Al; Aluminium; Azospirillum brasiliense; BNF; Evironments; FBN; Fixacao biologica de nitrogenio; Nitrogen fixing bacteria; Plants; Reduction; Root; Sorghum. |
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Thesagro: |
Acetileno; Alumínio; Bactéria; Genética; Gramínea; Gramineae; Meio Ambiente; Planta; Raiz; Redução; Rizosfera; Solo; Sorgo; Trigo. |
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Thesaurus Nal: |
acetylene; genetics; rhizosphere; soil; wheat. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02813nam a2200517 a 4500
001 1622272
005 1997-06-24
008 1991 bl uuuu m 00u1 u #d
100 1 $aCHRISTIANSEN-WENIGER, C.
245 $aInfluence of Azospirillum spp. on the nitrogen supply of a gramineous host.
260 $aWageningen: Landbouwuniversiteit, Out.$c1991
300 $a101p.
490 $aTese de Doutorado.
500 $aTese de Doutorado. Orientada por: A.J.Zehnder e J.A.van Veen.
520 $aThe main objectives of this study were to identify factors that control the behaviour of Azospirillum in the rhizosphere gramineous plant in order to be able to optimize the association between the bacteria and the host plants in terms of nitrogen supply to the host. Plant produced growth substances such as the auxines indole-acetic-acid (IAA) and 2,4-dichlorphenoxy-acetic-acid (2,4 D) or gibberilic acid enhance the acetylene reduction activity of a pure A.brasiliense culture. IAA and the cytocinine 6-benzylaminopurine also stimulated bacterial growth. It should be pointed out, that Azospirillum also produces IAA itself, which is often mentioned to be the reason of its plant-growth stimulating activity. When associated with living roots, the nitrogen fixation(acetylene reduction) activity of Azospirillum brasiliense is much less sensitive to the repressive influence of free oxygen and mineral nitrogen, i.e. N03 and NH4+, than in the absent of an active growing root. Potencial acetylene reduction rates varied from 10 to 550 nmol C2H4 h-1 plant-1 depending on environmental conditions. In order to be able to determine the fate of introduced Azospirillum in a soil and in the root environment A.brasiliense strains were marked by a transposon (Tn5) insertion into genome so that reisolation upon double resistance against kanamycin and rifampicin was possible. A.brasiliense::Tn5 established in the rhizosphere of an axenically grown spring wheat to cell numbers as high as 10x10x10x10x10x10 cells per gram dry rhizosphere...
650 $aacetylene
650 $agenetics
650 $arhizosphere
650 $asoil
650 $awheat
650 $aAcetileno
650 $aAlumínio
650 $aBactéria
650 $aGenética
650 $aGramínea
650 $aGramineae
650 $aMeio Ambiente
650 $aPlanta
650 $aRaiz
650 $aRedução
650 $aRizosfera
650 $aSolo
650 $aSorgo
650 $aTrigo
653 $aAl
653 $aAluminium
653 $aAzospirillum brasiliense
653 $aBNF
653 $aEvironments
653 $aFBN
653 $aFixacao biologica de nitrogenio
653 $aNitrogen fixing bacteria
653 $aPlants
653 $aReduction
653 $aRoot
653 $aSorghum
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
03/02/2016 |
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Data da última atualização: |
05/02/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
RECH-CAINELLI, V.; BARROS, N. M. de; GIANNI, S. G.; SBEGHEN-LOSS, A. C.; HEINZEN, H.; DÍAZ, A. R.; MIGUES, I.; SPECHT, A.; CESIO, M. V. |
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Afiliação: |
VANIA RECH-CAINELLI, UNIVERSIDADE CAXIAS DO SUL; NEIVA MONTEIRO DE BARROS, UNIVERSIDADE DE CAXIAS DO SUL; STEFFANI GARCIA GIANNI, UNIVERSIDADE DE CAXIAS DO SUL; ANA CAROLINA SBEGHEN-LOSS, UNIVERSIDADE DE CAXIAS DO SUL; HORACIO HEINZEN, UNIVERSIDAD DE LA REPUBLICA, MONTEVIDEO; ALEJANDRO RUIZ DÍAZ, UNIVERSIDAD DE LA REPUBLICA, MONTEVIDEO; IGNACIO MIGUES, UNIVERSIDAD DE LA REPUBLICA; ALEXANDRE SPECHT, CPAC; MARÍA VERÓNICA CESIO, UNIVERSIDAD DE LA REPUBLICA, MONTEVIDEO. |
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Título: |
Antifeedant and repellent effects of neotropical Solanum extracts on drywood termites (Cryptotermes brevis, Isoptera: Kalotermitidae) |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Sociobiology, Feira de Santana, v. 62, n. 1, p. 82-87, March 2015. |
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ISSN: |
0361-6525 |
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DOI: |
10.13102/sociobiology.v62i1.82-87 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Antifeedant and repellent effects of two different extracts from native Solanum species Solanum bistellatum and Solanum sisymbrifolium on Cryptotermes brevis were evaluated. The extracts obtained, particularly the dichloromethane extracts and the enriched fraction of sugar esters from S. sisymbrifolium and S. bistellaltum, showed antifeedant and repellent action against the termite. The antifeedant effect of dichloromethane extract from S. sisymbrifolium at the concentration of 25.00mg/mL reached 100%, while the repellent action of the dichloromethane extracts and that of the enriched fraction of sugar esters at the concentration of 1.00mg/mL was higher than 90%. In case of S. bistellatum, the antifeedant effect of the dichloromethane extract and the enriched fraction of sugar esters at the concentration of 25.00mg/mL was 43.29% and 57.46%, respectively. The repellent action of the dichloromethane extracts and of the enriched fraction of sugar esters at a concentration level of 2.50mg/mL was higher than 92%. |
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Thesagro: |
Controle biológico; Hábito alimentar; Repelente; Solanacea. |
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Thesaurus NAL: |
Cryptotermes brevis; Feeding behavior; Pest control; Solanaceae; Solanum. |
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Categoria do assunto: |
O Insetos e Entomologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/138365/1/35147.pdf
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Marc: |
LEADER 02051naa a2200349 a 4500
001 2036030
005 2016-02-05
008 2015 bl uuuu u00u1 u #d
022 $a0361-6525
024 7 $a10.13102/sociobiology.v62i1.82-87$2DOI
100 1 $aRECH-CAINELLI, V.
245 $aAntifeedant and repellent effects of neotropical Solanum extracts on drywood termites (Cryptotermes brevis, Isoptera$bKalotermitidae)
260 $c2015
520 $aAbstract: Antifeedant and repellent effects of two different extracts from native Solanum species Solanum bistellatum and Solanum sisymbrifolium on Cryptotermes brevis were evaluated. The extracts obtained, particularly the dichloromethane extracts and the enriched fraction of sugar esters from S. sisymbrifolium and S. bistellaltum, showed antifeedant and repellent action against the termite. The antifeedant effect of dichloromethane extract from S. sisymbrifolium at the concentration of 25.00mg/mL reached 100%, while the repellent action of the dichloromethane extracts and that of the enriched fraction of sugar esters at the concentration of 1.00mg/mL was higher than 90%. In case of S. bistellatum, the antifeedant effect of the dichloromethane extract and the enriched fraction of sugar esters at the concentration of 25.00mg/mL was 43.29% and 57.46%, respectively. The repellent action of the dichloromethane extracts and of the enriched fraction of sugar esters at a concentration level of 2.50mg/mL was higher than 92%.
650 $aCryptotermes brevis
650 $aFeeding behavior
650 $aPest control
650 $aSolanaceae
650 $aSolanum
650 $aControle biológico
650 $aHábito alimentar
650 $aRepelente
650 $aSolanacea
700 1 $aBARROS, N. M. de
700 1 $aGIANNI, S. G.
700 1 $aSBEGHEN-LOSS, A. C.
700 1 $aHEINZEN, H.
700 1 $aDÍAZ, A. R.
700 1 $aMIGUES, I.
700 1 $aSPECHT, A.
700 1 $aCESIO, M. V.
773 $tSociobiology, Feira de Santana$gv. 62, n. 1, p. 82-87, March 2015.
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