Crescimento de Mentha piperita L, cultivada em solução nutritiva com diferentes doses de potássio

The research aimed at the evaluation of the influence of different potassium doses on the growth and development of Mentha piperita L. The experiment was conducted with stalks rooted in a commercial substrate and transplanted to a complete nutritive solution varying the treatments as following: (a) 234 mg L-1 of K; (b) 117 mg L-1 of K; and (c) 58.5 mg L-1 of K. Plants were evaluated at 21, 42, 63, 84 and 105 days after transplanting (DAT). In this study there were determined the physiological indexes leaf area ratio (LAR), specific leaf area (SLA), net assimilatory rate (NAR) and relative growth rate (RGR) were determined. The results indicated that the decreasing of K concentration to 25% did not affect the LAR, SLA, NAR and RGR physiological indexes.

Atividade antioxidante e antimicrobiana do alecrim (Rosmarinus officinalis L.) em filés de tilápia (Oreochromis ssp) salgados secos durante o armazenamento congelado

Rosemary (Rosmarinus officinalis L.) is a spice from Lamiaceae family known since ancient times because its medicinal effects and, currently, several studies have pointed its antioxidant and antimicrobian effects. Lipid oxidation is a problem in food production because proceed the lost of organoleptical and nutritional qualities so required in Market. Fish salting is an ancient conservation method that expect reduce water activity and, consequently, microorganism growth in food, except halophillic bacteria. In the meantime, the inconvenient of this procedure is that the salt accelerates tissue's lipid oxidation. The aim of this work was evaluate the antioxidative and antimicrobian effects by treatment and pre treatment with rosemary (Rosmarinus officinalis L.) aqueous extract in dry salted tilapia fillets, storaged in freezing temperatures. To follow the oxidative, dry salted tilapia fillets were treated or pre treated with rosemary natural extract and storage at -18°C for 240 days. Analisys of 2-thiobarbituric acid reactive substances (TBARS), soluble nitrogen in trichloroacetic acid (TCA), water activity and microbiology were done. The pre treatment (3.39±0,53) and the treatment with rosemary (3.31±0.79) had oxidative index twice lower than the control treatment (6.14±1.21) in the last time of the research. The microbiological rosemary analisys showed count levels of resistant microorganisms to salt (2.0×103CFU/g of sample), whom causes the initial fillets contamination. The microbiological counts remained invariable in all groups during storage periods.

Cálcio e ethephon no desenvolvimento e produção de óleo essencial de menta (Mentha Piperita L.), cultivada em solução nutritiva

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Produção de biomassa, rendimento e composição do óleo essencial de manjericão (Ocimum basilicum L.) em função de reguladores vegetais

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Uso popular de plantas medicinais na comunidade rural da Vargem Grande Município de Natividade da Serra, SP

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Efeito alelopático de extrato de leonurus sibiricus l. em mentha piperita l.. desenvolvimento, trocas gasosas e metabólitos do óleo essencial

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização da diversidade genética e da composição química dos óleos essenciais de populações de Ocimum selloi Benth

Pós-graduação em Agronomia (Horticultura) - FCA

Physiological indexese macro- and micronutrients in plant tissue and essential oil of Mentha piperita L. grown in nutrient solution with variation in N, P, K and Mg levels

Mentha piperita L. is an aromatic and medicinal species of the family Lamiaceae, known as mint or peppermint, and its leaves and branches produce essential oil rich in menthol. This study aimed to evaluate physiological indexes, macro- and micronutrients inthe shootsand essential oil of Mentha piperita L. grown in nutrient solution number 2 of Hoagland and Arnon (1950) with different N, P, K and Mg levels. Shoot length, dry mass of the different organs, total dry mass, leaf area, essential oil yield and composition, and macronutrient (N, P, K, Mg, Ca, S) and micronutrient (Mn, Cu, Fe, Zn) contents in the shoot were evaluated. Plants treated with 65%N/50%P/25%K/100%Mg had a tendency towards longer shoot, greaterroot and leaf blade dry masses, higher essential oil yield, higher menthol levels and lower menthone levels. The results showed that Mentha can be grown in nutrient solution by reducing 65% N, 50% P, 25% K and 100% Mg. This solution had better development compared to the other tested treatments. Therefore,we recommendMentha piperita L. to be grown with such nutrient levels.

Composição de óleo volátil de manjericão (Ocimum basilicum L. em plantas sadias e infectadas por vírus

Ocimum basilicum L., popularmente conhecido como manjericão, é uma planta pertencente à Lamiaceae, cujo óleo volátil possui diversas atividades biológicas, tais como antifúngica, antigiardíase, antioxidante, antibacteriana, antileishmaniose, inseticida, dentre outras. É constituído principalmente por monoterpenos, sesquiterpenos e fenilpropanoides. A composição de metabólitos secundários nas plantas, dos quais os óleos voláteis fazem parte, pode sofrer influência de diversos fatores. Neste trabalho, foi investigada a influência das doenças virais no perfil dos óleos voláteis do manjericão. Para isso, sementes de Ocimum basilicum L. cv. Genovese foram semeadas e mantidas em casa de vegetação. Ao atingirem tamanho adequado (dois pares de folhas acima das cotiledonares), foram inoculadas com vírus não identificado, isolado de manjericão, além do Cucumber mosaic virus (CMV) e Tobacco mosaic virus (TMV). O óleo volátil de plantas sadias e infectadas foi extraído por hidrodestilação em aparelho de Clevenger e analisado em cromatógrafo gasoso acoplado ao espectrômetro de massas. Os cromatogramas revelaram a presença de metileugenol e ρ- cresol,2,6-di-terci-butílico como principais componentes, sendo que a porcentagem de metileugenol diminuiu significativamente nas plantas infectadas com o vírus não identificado. Houve mudanças na composição do óleo volátil, sendo alguns componentes encontrados apenas nas plantas sadias e outros somente nas infectadas

Caracterização fitoquímica e ensaios biológicos de Coleus blumei Benth

Coleus blumei Benth (Lamiaceae), popularly known in Brazil as heart-hurt or coleus-of-Java is an ornamental plant widely used due to the color of its leaves. Several species of the genus Coleus present compounds with antioxidant, antimicrobial and allopathic activities due to the presence of chemicals such coleonol, forskolin and rosmarinic acid. Therefore, this study aimed to carry out phytochemical study and biological tests to evaluate the antibacterial, antioxidant and allopathic activities of the 70% ethanol extract and its fractions ethyl acetate, dichloromethane and end aqueous fraction leaf of Coleus blumei Benth. The plant extract was prepared by turbolisis from the powder of dried leaves, as a solvent for extraction using 70% ethanol. The ethanol extract was fractionated with solvents dichloromethane and ethyl acetate. The phytochemical study identified the presence of saponins, free anthraquinones, flavonoids and anthocyanidins. In evaluating the antibacterial dichloromethane fraction showed activity against all microorganisms tested both in agar diffusion test and microdilution test. The 70% ethanol extract showed activity against the micro-organisms S. aureus and S. epidermidis in agar diffusion test and against all microorganisms tested in microdilution test. The ethyl acetate fraction showed activity against the micro-organism S. aureus in the agar diffusion test and against all microorganisms tested in microdilution test. The end aqueous fraction showed no activity against any micro-organism tested. In the test of evaluation activity allopathic dichloromethane fraction showed greater inhibition of seed germination and growth of tomato (Lycopersicon esculentum Mill), followed by 70% ethanolic extract, the ethyl acetate fraction and the end aqueous fraction. In testing the antioxidant activity with DPPH ethyl acetate fraction showed higher antioxidant activity followed... (Complete abstract click electronic access below)

Antimicrobial and antileishmanial activities of diterpenoids isolated from the roots of salvia deserta

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)