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Registro Completo |
Biblioteca(s): |
Embrapa Solos / UEP-Recife. |
Data corrente: |
15/02/2015 |
Data da última atualização: |
17/06/2015 |
Autoria: |
FERREIRA, J. A. de M. |
Título: |
Reconhecimento geológico do norte do Piauí. |
Ano de publicação: |
1967 |
Fonte/Imprenta: |
Recife, PE: SUDENE - Divisão de Documentação, 1967. |
Páginas: |
21 p. |
Série: |
(SUDENE. Divisão de Documentação. Geologia regional, 2). |
Idioma: |
Português |
Palavras-Chave: |
Buriti dos Lopes; Cocal; João Bento; Luís Correia; Parnaíba; Petrografia; Sobradinho. |
Thesagro: |
Geologia; Reconhecimento. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00640nam a2200229 a 4500 001 2008858 005 2015-06-17 008 1967 bl uuuu u0uu1 u #d 100 1 $aFERREIRA, J. A. de M. 245 $aReconhecimento geológico do norte do Piauí. 260 $aRecife, PE: SUDENE - Divisão de Documentação$c1967 300 $a21 p. 490 $a(SUDENE. Divisão de Documentação. Geologia regional, 2). 650 $aGeologia 650 $aReconhecimento 653 $aBuriti dos Lopes 653 $aCocal 653 $aJoão Bento 653 $aLuís Correia 653 $aParnaíba 653 $aPetrografia 653 $aSobradinho
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Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
16/05/2005 |
Data da última atualização: |
08/11/2012 |
Autoria: |
VOLL, E.; VOLL, C. E.; VICTORIA FILHO, R. |
Título: |
Allelopathic effects of aconitic acid on wild poinsettia (Euphorbia heterophylla) and morningglory (Ipomoea grandifolia). |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
Journal of Environmental Science and Health, New York, v.B40, n. 1, p. 69-75, 2005. |
Idioma: |
Inglês |
Conteúdo: |
High infestations of alexandergrass (Brachiaria plantaginea) in experimental area have reduced seedbank of some weed species in soil at a greater degree compared to those obtained with the use of an efficient herbicide. Aconitic acid (AA) has been identified in those plants in high concentration. Thus, two experiments were carried out in the laboratory to determine the effects of pure AA on weed seed germination and on endophytic fungi in wild poinsettia (Euphorbia heterophylla) and morningglory (Ipomoea grandifolia) weed species. Doses of AA (0, 0.5, 1.0, and 2.0 mM) were introduced in agar-water 0.5% medium and weed seeds treated with and without external sterilization by sodium hypochloride. Four replications of fifty seeds of each species by treatment were sown in plastic boxes with cover and maintained in germination chamber for 12 days. Reduction in germination rate, root and stem growth were observed in both species, as well as reduction in root number in morningglory were also observed at 2.0 mM concentration of AA. An increase in number of seeds with presence of endophytic fungi was also observed in both species, independently of seed sterilization, mainly of a green type fungi coloration in wild poinsettia. Aconitic acid presents allelopathic activity and can stimulate endophytic fungi species growth in weed seeds. |
Palavras-Chave: |
Fungo endofítico. |
Thesagro: |
Alelopatia; Erva Daninha. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01922naa a2200181 a 4500 001 1467944 005 2012-11-08 008 2005 bl --- 0-- u #d 100 1 $aVOLL, E. 245 $aAllelopathic effects of aconitic acid on wild poinsettia (Euphorbia heterophylla) and morningglory (Ipomoea grandifolia). 260 $c2005 520 $aHigh infestations of alexandergrass (Brachiaria plantaginea) in experimental area have reduced seedbank of some weed species in soil at a greater degree compared to those obtained with the use of an efficient herbicide. Aconitic acid (AA) has been identified in those plants in high concentration. Thus, two experiments were carried out in the laboratory to determine the effects of pure AA on weed seed germination and on endophytic fungi in wild poinsettia (Euphorbia heterophylla) and morningglory (Ipomoea grandifolia) weed species. Doses of AA (0, 0.5, 1.0, and 2.0 mM) were introduced in agar-water 0.5% medium and weed seeds treated with and without external sterilization by sodium hypochloride. Four replications of fifty seeds of each species by treatment were sown in plastic boxes with cover and maintained in germination chamber for 12 days. Reduction in germination rate, root and stem growth were observed in both species, as well as reduction in root number in morningglory were also observed at 2.0 mM concentration of AA. An increase in number of seeds with presence of endophytic fungi was also observed in both species, independently of seed sterilization, mainly of a green type fungi coloration in wild poinsettia. Aconitic acid presents allelopathic activity and can stimulate endophytic fungi species growth in weed seeds. 650 $aAlelopatia 650 $aErva Daninha 653 $aFungo endofítico 700 1 $aVOLL, C. E. 700 1 $aVICTORIA FILHO, R. 773 $tJournal of Environmental Science and Health, New York$gv.B40, n. 1, p. 69-75, 2005.
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