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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
04/05/1993 |
Data da última atualização: |
04/05/1993 |
Autoria: |
PIZYSIEZNIG FILHO, J.; GONZAGA, M. L.; SAAD, A. M. |
Afiliação: |
Instituto de Pesquisas Tecnologicas de Sao Paulo. |
Título: |
Rentabilidade e custos da agricultura irrigada na regiao de Guaira - SP. |
Ano de publicação: |
1992 |
Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE IRRIGACAO E DRENAGEM, 9., 1991, Natal. Anais. Fortaleza: ABID, 1992. |
Volume: |
v.2 |
Páginas: |
p.1875-1940 |
Idioma: |
Português |
Palavras-Chave: |
Agricultura irrigada; Guaira; Sao Paulo; SP. |
Thesagro: |
Custo; Rentabilidade. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00649naa a2200229 a 4500 001 1010365 005 1993-05-04 008 1992 bl uuuu u00u1 u #d 100 1 $aPIZYSIEZNIG FILHO, J. 245 $aRentabilidade e custos da agricultura irrigada na regiao de Guaira - SP. 260 $c1992 300 $ap.1875-1940 v.2 490 $vv.2 650 $aCusto 650 $aRentabilidade 653 $aAgricultura irrigada 653 $aGuaira 653 $aSao Paulo 653 $aSP 700 1 $aGONZAGA, M. L. 700 1 $aSAAD, A. M. 773 $tIn: CONGRESSO NACIONAL DE IRRIGACAO E DRENAGEM, 9., 1991, Natal. Anais. Fortaleza: ABID, 1992.
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Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
20/09/2012 |
Data da última atualização: |
20/09/2012 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
QUEIROZ, S. C. do N. de; CANTRELL, C. L.; DUKE, S. O.; WEDGE, D. E.; NANDULA, V. K.; MORAES, R. M.; CERDEIRA, A. L. |
Afiliação: |
SONIA CLAUDIA DO N DE QUEIROZ, CNPMA; CHARLES L. CANTRELL, USDA-ARS; STEPHEN O. DUKE, USDA-ARS; DAVID E. EDGE, USDA-ARS; VIJAY K. NANDULA, USDA-ARS; RITA MARIA MORAES, UNIVERSITY OF MISSISSIPI; ANTONIO LUIZ CERDEIRA, CNPMA. |
Título: |
Bioassay-directed isolation and identification of phytotoxic and fungitoxic acetylenes from Conyza canadensis. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Journal of Agricultural and Food Chemistry, Washington, DC, v. 60, n. 23, p. 5893-5898, 2012. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Conyza canadensis (L.) Cronquist syn. (horseweed) is a problematic and invasive weed with reported allelopathic properties. To identify the phytotoxic constituents of the aerial parts, a systematic bioactivity-guided fractionation of the dichloromethane extract was performed. Three active enyne derivatives, (2Z,8Z)-matricaria acid methyl ester, (4Z,8Z)-matricaria lactone, and (4Z)-lachnophyllum lactone, were identified. The lactones inhibited growth of the monocot Agrostis stolonifera (bentgrass) and the dicot Lactuca sativa (lettuce) at 1 mg mL−1, while the (2Z,8Z)-matricaria acid methyl ester was less active. In a dose−response screening of the lactones for growth inhibitory activity against Lemna paucicostata, (4Z)-lachnophyllum lactone was the most active with an IC50 of 104 μM, while the (4Z,8Z)-matricaria lactone was less active (IC50 of 220 μM). In a fungal direct bioautography assay, the two lactones at 10 and 100 μg/spot inhibited growth of the plant pathogenic fungi Colletotrichum acutatum, Colletotrichum fragariae, and Colletotrichum gloeosporioides. In a dose−response screening of the lactones against six different plant pathogenic fungi, (4Z,8Z)-matricaria lactone was more active than the commercial fungicide azoxystrobin on Col. acutatum, Col. fragariae, and Col. gloeosporioides at 30 μM and about as active as the commercial fungicide captan against Col. gloeosporioides, while (4Z)-lachnophyllum lactone was less active. MenosAbstract: Conyza canadensis (L.) Cronquist syn. (horseweed) is a problematic and invasive weed with reported allelopathic properties. To identify the phytotoxic constituents of the aerial parts, a systematic bioactivity-guided fractionation of the dichloromethane extract was performed. Three active enyne derivatives, (2Z,8Z)-matricaria acid methyl ester, (4Z,8Z)-matricaria lactone, and (4Z)-lachnophyllum lactone, were identified. The lactones inhibited growth of the monocot Agrostis stolonifera (bentgrass) and the dicot Lactuca sativa (lettuce) at 1 mg mL−1, while the (2Z,8Z)-matricaria acid methyl ester was less active. In a dose−response screening of the lactones for growth inhibitory activity against Lemna paucicostata, (4Z)-lachnophyllum lactone was the most active with an IC50 of 104 μM, while the (4Z,8Z)-matricaria lactone was less active (IC50 of 220 μM). In a fungal direct bioautography assay, the two lactones at 10 and 100 μg/spot inhibited growth of the plant pathogenic fungi Colletotrichum acutatum, Colletotrichum fragariae, and Colletotrichum gloeosporioides. In a dose−response screening of the lactones against six different plant pathogenic fungi, (4Z,8Z)-matricaria lactone was more active than the commercial fungicide azoxystrobin on Col. acutatum, Col. fragariae, and Col. gloeosporioides at 30 μM and about as active as the commercial fungicide captan against Col. gloeosporioides, while (4Z)-lachnophyllum lactone was less a... Mostrar Tudo |
Palavras-Chave: |
Acetylenes; Horseweed. |
Thesagro: |
Alelopatia; Erva daninha; Fungicida; Herbicida; Toxidez. |
Thesaurus NAL: |
Alkynes; Allelopathy; Antifungal properties; Conyza canadensis; Fungicides; Herbicides; Phytotoxicity. |
Categoria do assunto: |
H Saúde e Patologia |
Marc: |
LEADER 02540naa a2200361 a 4500 001 1934251 005 2012-09-20 008 2012 bl uuuu u00u1 u #d 100 1 $aQUEIROZ, S. C. do N. de 245 $aBioassay-directed isolation and identification of phytotoxic and fungitoxic acetylenes from Conyza canadensis.$h[electronic resource] 260 $c2012 520 $aAbstract: Conyza canadensis (L.) Cronquist syn. (horseweed) is a problematic and invasive weed with reported allelopathic properties. To identify the phytotoxic constituents of the aerial parts, a systematic bioactivity-guided fractionation of the dichloromethane extract was performed. Three active enyne derivatives, (2Z,8Z)-matricaria acid methyl ester, (4Z,8Z)-matricaria lactone, and (4Z)-lachnophyllum lactone, were identified. The lactones inhibited growth of the monocot Agrostis stolonifera (bentgrass) and the dicot Lactuca sativa (lettuce) at 1 mg mL−1, while the (2Z,8Z)-matricaria acid methyl ester was less active. In a dose−response screening of the lactones for growth inhibitory activity against Lemna paucicostata, (4Z)-lachnophyllum lactone was the most active with an IC50 of 104 μM, while the (4Z,8Z)-matricaria lactone was less active (IC50 of 220 μM). In a fungal direct bioautography assay, the two lactones at 10 and 100 μg/spot inhibited growth of the plant pathogenic fungi Colletotrichum acutatum, Colletotrichum fragariae, and Colletotrichum gloeosporioides. In a dose−response screening of the lactones against six different plant pathogenic fungi, (4Z,8Z)-matricaria lactone was more active than the commercial fungicide azoxystrobin on Col. acutatum, Col. fragariae, and Col. gloeosporioides at 30 μM and about as active as the commercial fungicide captan against Col. gloeosporioides, while (4Z)-lachnophyllum lactone was less active. 650 $aAlkynes 650 $aAllelopathy 650 $aAntifungal properties 650 $aConyza canadensis 650 $aFungicides 650 $aHerbicides 650 $aPhytotoxicity 650 $aAlelopatia 650 $aErva daninha 650 $aFungicida 650 $aHerbicida 650 $aToxidez 653 $aAcetylenes 653 $aHorseweed 700 1 $aCANTRELL, C. L. 700 1 $aDUKE, S. O. 700 1 $aWEDGE, D. E. 700 1 $aNANDULA, V. K. 700 1 $aMORAES, R. M. 700 1 $aCERDEIRA, A. L. 773 $tJournal of Agricultural and Food Chemistry, Washington, DC$gv. 60, n. 23, p. 5893-5898, 2012.
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