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Allelopathic potential of orsellinic acid derivatives BABT
Peres,Marize Terezinha Lopes Pereira; Mapeli,Ana Maria; Faccenda,Odival; Gomes,Alcir Teixeira; Honda,Neli Kika.
Environmental degradation caused by the excessive use of pesticides has motivated studies aimed at the discovery of new formulations for pest control. The bioassays carried out under laboratory conditions for the present study involved the germination and seedling growth of Lactuca sativa cv. Grand Rapids and Allium cepa cv. Baia Periforme treated with lecanoric acid or one of seven esters obtained from the alcoholysis of the acid. Each substance was tested at concentrations of 10-3, 10-5, 10-7 M, and 10-9 M. The results revealed that, except for lecanoric acid and methyl orsellinate, all other compounds exhibited significant differences in their action when compared with the controls. Also, A. cepa was more sensitive to the compounds assayed, at the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Germination; Growth; Lactuca sativa; Allium cepa; Orsellinates.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400027
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Antibacterial activity of orsellinates BJM
Gomes,Alcir Teixeira; Smania Júnior,Artur; Seidel,Cintia; Smania,Elza de Fátima Albino; Honda,Neli Kika; Roese,Fernanda Mesquita; Muzzi,Rozanna Marques.
In order to obtain new compounds with antibacterial activity, the derivatives 2,4-dihydroxy-6-methylbenzoic acid (orsellinic acid) and 2,4-dihydroxy-6-methylbenzoates (orsellinates) were obtained through alcoholyses of lecanoric acid. All these substances were tested against Gram-positive and Gram-negative bacteria by a microdilution method. Staphylococcus aureus, Xanthomonas campestris var. vesicatoria and Ralstonia solanacearum were most sensitive to n-propyl 2,4-dihydroxy-6-methylbenzoate, n-pentyl 2,4-dihydroxy-6-methylbenzoate and n-hexyl 2,4-dihydroxy-6-methylbenzoate with MIC (Minimal Inhibitory Concentration) values ranging from 62.5 to 7.8 µg×mL¹. These results showed that homologation in carbon chain may lead to compounds with more pronunced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Orsellinates; Lecanoric acid; Orsellinic acid; Antibacterial activity.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000300002
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Gas Chromatography-Mass Spectrometry (GC-MS) and evaluation of antioxidant and antimicrobial activities of essential oil of Campomanesia adamantium (Cambess.) O. Berg (Guavira) BJPS
Coutinho,Isabel Duarte; Cardoso,Claúdia Andréa Lima; Ré-Poppi,Nilva; Melo,Adriana Mestriner; Vieira,Maria do Carmo; Honda,Neli Kika; Coelho,Roberta Gomes.
The essential oils from Campomanesia adamantium (Cambess.) O. Berg leaves, collected in the reproductive (flowering and fruit-bearing) and vegetative stages, were characterized by GC-MS (Gas Chromatography-Mass Spectrometry). A total of 95 compounds of the essential oils were identified. In the reproductive stage (flowering) the major constituents were monoterpenes (limonene, α-pinene and β-pinene) while during the vegetative stage the major constituents were the sesquiterpenes (bicyclogermacrene and globulol). The essential oil of the reproductive stage shows high antimicrobial activity against Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans, and all show moderate activity against Escherichia coli. The essential oils were also evaluated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Campomanesia adamantium/antioxidant activity; Campomanesia adamantium/antimicrobial activity; Guavira; Essential oil/caracterization.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000400022
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Phenolic compounds and antioxidant, antimicrobial and antimycobacterial activities of Serjania erecta Radlk. (Sapindaceae) BJPS
Cardoso,Claudia Andréa Lima; Coelho,Roberta Gomes; Honda,Neli Kika; Pott,Arnildo; Pavan,Fernando Rogério; Leite,Clarice Queico Fujimura.
Serjania erecta Radlk.(Sapindaceae) is a medicinal plant traditionally used in Brazil. We assayed the ethanolic extract of leaves and roots against seven microorganisms. The REMA (Resazurin Microtiter Assay) assay was used to measure the biological activity in vitro against Mycobacterium tuberculosis and our results showed moderate activity of the ethanolic extract. On the other hand S. aureus, P. aeruginosa, S. setubal, C. albicans, S. cerevisiae and E. coli revealed that the leaves and roots of S. erecta inhibited the growth of all microorganisms. The ethanolic extracts of leaves and roots showed low values of antioxidant activities. The ethanolic extracts of leaves and roots were analyzed by chromatographic and spectrometric methods. (-)-Epicatechin,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Serjania erecta Radlk/pharmacognosy; Serjania erecta Radlk/ethanolic extract; Serjania erecta Radlk/antioxidant activity; Serjania erecta Radlk/ethanolic extract; Serjania erecta Radlk/antimicrobial activity; Sapindaceae/pharmacognosy; Cipó-cinco-folhas/pharmacognosy; Flavonoids; Medicinal plants.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000400017
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Phytotoxicity of Perlatolic Acid and Derivatives BABT
Peres,Marize Terezinha; Cândido,Ana Carina S.; Faccenda,Odival; Gianini,Aline Siqueira; Honda,Neli Kika.
ABSTRACT Perlatolic acid (1), methyl perlatolate (2), and the products of perlatolic acid alcoholysis-namely, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, and n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (3-11)-were evaluated for their herbicidal potential on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. The compounds exhibited low phytotoxicity on L. sativa germination. Perlatolic acid (1) proved the most active compound (20%). Activity was lowest for n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (11) (3.5%). The esters iso-propyl and sec-butyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (6 and 8, respectively) inhibited root (35% e 43%, respectively) and hypocotyl growth (59% e 56%, respectively). The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Perlatolic acid; 2-hydroxy-4-methoxy-6-n-pentylbenzoates; Lactuca sativa; Allium cepa; Allelopathy..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100205
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