scholarly journals Produção de gerânio (Pelargonium graveolens) e óleo essencial em sistemas de cultivos e adubações com plantas oriundas de cultura in vitro

2014 ◽  
Author(s):  
Paulo Rabelo
2021 ◽  
Vol 9 (1) ◽  
pp. 109-113
Author(s):  
Javed Ahamad ◽  
Subasini Uthirapathy

Pelargonium graveolens (Geranium) is a source of the finest quality of fragrance and its essential oils are used as antibacterial, and antifungal agents. The aim of the current research is to determine chemical constituents in the essential oil of P. graveolens by GC-MS and evaluate its antidiabetic activity via α-glucosidase inhibition assay. The chemical composition of P. graveolens essential oil was determined by GC/MS and its antidiabetic activity was assessed through inhibition of α-glucosidase enzyme in in-vitro models. GC-MS analysis determines 36 chemical components in the essential oil of P. graveolens leaves, and citronellyl isovalerate (10.41 %), menthol (9.61 %), linalool (8.63 %), p-menthone (6.31 %), and geranyl tiglate (4.99 %) were recorded as major constituents. The essential oil of P. graveolens leaves showed concentration dependant inhibition of α-glucosidase enzyme ranging from 28.13±1.41 to 74.24±2.53 µg/mL for concentration ranging from 31.25 to 1000 µg/mL. The IC50 values for of P. graveolens and acarbose were found as 93.72±4.76 and 80.4±2.17 µg/mL, respectively against the α-glucosidase enzyme. The study finding explores the chemical components of P. graveolens growing in the Iraqi Kurdistan region and scientifically supported its possible use in diabetic patients for controlling postprandial hyperglycemia.


2018 ◽  
Author(s):  
Ilias Marmouzi ◽  
El Mostafa Karym ◽  
Rachid Alami ◽  
Meryem El Jemli ◽  
Mourad Kharbach ◽  
...  

AbstractBackgroundTherapy combination is defined as disease treatment with two or more medication to acheive efficacy with lower doses or lower toxicity. Regarding its reported toxicities and efficacy, the Essential Oils (EOs) from Syzygium aromaticum (SA) and Pelargonium graveolens (PG) were combined for in vitro and in vivo assays and toxicities.MethodsThe Essential Oils and mixture were tested for in vivo/in vitro antioxidant and anti-inflammatory activities. The assays included the animal model of acute inflammation (carrageenan model), the protective effect on H2O2/Sodium nitroprissude induced stress in Tetrahymena pyriformis, and the in vitro antioxidant assays.ResultsThe chemical analysis of the investigated Oils has lead to the identification of Eugenol (74.06%), Caryophyllene (11.52%) and Carvacrol acetate (7.82%) as the major element in SA; while PG was much higher in Citronellol (30.77%), 10-epi-γ-Eudesmol (22.59%), and Geraniol (13.95%). In our pharmacological screening of samples, both Oils demonstrated good antioxidant effects. In vivo investigation of the antioxidant activity in the protozoa model (T. pyriformis) demonstrated a lesser toxic effect of EOs mixture with no significant differences when oxidative stress markers and antioxidant enzymes (MDA, SOD and CAT) were evaluated. On the other hand the in vivo model of inflammatory response to carrageenan demonstrated a good inhibitory potential of both EOs. The EOs Mixture demonstrated equivalent bioactivity with lower toxic effect and minimal risk for each compound.ConclusionsThe results from this study indicate that EOs mixture from SA and PG demonstrated promising modulatory antioxidant/anti-inflammatory effect, which suggest an efficient association for therapy.


2018 ◽  
Vol 23 (2) ◽  
Author(s):  
Andreia Volpato ◽  
Gabriela Galli ◽  
Gabriela Campigotto ◽  
Patricia Glombowsky ◽  
Roberto Santos ◽  
...  

Alphitobius diaperinus, popularmente conhecido como o cascudinho de aviário, é um inseto que se destaca na avicultura por ser vetor de patógenos e de difícil controle. Esta dificuldade está relacionada à contra-indicação na utilização de produtos químicos, já que enquanto as aves estão no aviário, grandes prejuízos podem ocorrer em consequência de elevadas infestações. Portanto, produtos naturais com potencial inseticida e larvicida poderiam ser usados, sem prejudicar as aves e sem deixar resíduo na carne do frango. Em virtude disso, neste estudo objetivou-se verificar o efeito dos óleos de Capim limão (Cymbopogon citratus), Cedro (Cedrus atlantica), Gengibre (Zingiber officinale), Gerânio (Pelargonium graveolens), Junípero (Juniperus communis), Palmarosa (Cymbopogon martinii), Tomilho (Thymus vulgaris) e Vetiver (Vetiveria zizanioides) sobre a suscetibilidade de A. diaperinus. Os testes foram realizados em triplicata com os óleos essenciais nas concentrações de 1, 5 e 10%. A fim de validar os testes, foram utilizados dois controles: sem tratamento e com diluente (Triton). O efeito inseticida do óleo de Capim limão não foi satisfatório, pois a mortalidade superior a 50% foi atingida 15 dias após início do teste. O óleo de Cedro não demostrou efeito significativo sobre adultos e larvas, pois os valores de mortalidade foram inferiores a 50% em todas as concentrações avaliadas. Os efeitos inseticidas e larvicidas não foram observados nos demais óleos nas concentrações testadas neste experimento (P>0,05).  Portanto, com base nos resultados dos testes in vitro podemos concluir que os óleos testados neste trabalho não apresentam efeitos inseticidas e larvicidas nas concentrações testadas, sobre A. diaperinus e, com isso, são inadequados para o controle alternativo desta praga.


Author(s):  
Juliana Pereira Freitas ◽  
Ingrid Lins Raquel de Jesus ◽  
Jéssica Karoline de Oliveira Chaves ◽  
Isabela Scalioni Gijsen ◽  
Diefrey Ribeiro Campos ◽  
...  

Abstract The essential oils (EOs) of Illicium verum and Pelargonium graveolens were evaluated for lethality, inhibition of development and residual efficacy against the flea Ctenocephalides felis felis. Their chemical composition was characterized by means of gas chromatography with a flame ionization and mass spectrometry detection. Mortality at different immature stages and among adult fleas was measured through in vitro filter paper tests at different concentrations of EOs. The chemical characterization of I. verum volatile oil showed that E-anethole (79.96%) was the major constituent, while the major compounds in P. graveolens were citronellol (29.67%) and geraniol (14.85%). Insecticidal activity against both immature and adult flea stages were observed. The EO of I. verum had insecticidal activity for approximately 18 days, while the EO activity of P. graveolens lasted for 13 days. The pulicidal activity of I. verum remained above 70% for up to 9 days, while the activity of P. graveolens was 41.7% for up to 2 days. Essential oils, especially that of I. verum, showed insecticidal activity for flea control at different life cycle stages and have potential for the development of ectoparasiticides (biopesticides) for veterinary use.


Phytomedicine ◽  
2009 ◽  
Vol 16 (10) ◽  
pp. 972-975 ◽  
Author(s):  
Antonio Rosato ◽  
Cesare Vitali ◽  
Monica Piarulli ◽  
Manuela Mazzotta ◽  
Maria Pia Argentieri ◽  
...  

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