M. Makkizadeh Tafti; M. Salimi; R. Farhoudi
Volume 24, Issue 4 , February 2009, , Pages 463-471
Abstract
The allelopathic effects of rue (Ruta graveolens L.) were evaluated on seed germination of velvet flower (Amaranthus retroflexus), flixweed (Descurainia Sophia) and purslane (Portulaca oleracea) in laboratory using the aqueous extracts of dried powdered of rue leaves. The treatments were 0.5, 1, 2.5, ...
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The allelopathic effects of rue (Ruta graveolens L.) were evaluated on seed germination of velvet flower (Amaranthus retroflexus), flixweed (Descurainia Sophia) and purslane (Portulaca oleracea) in laboratory using the aqueous extracts of dried powdered of rue leaves. The treatments were 0.5, 1, 2.5, 5, 10 and 15% extract of Ruta graveolens and distilled water (control). According to the results, extracts significantly inhibited seed germination of weed species and the degree of inhibition increased with increasing concentration of extracts. Germination of Amaranthus retroflexus seeds was inhibited at concentrations greater than 5%. In addition, radicle and plumule lengths of Amaranthus retroflexus were significantly reduced at 1% compared to the distilled water. Results indicated germination percentage, germination rate and radicle and plumule lengths of Portulaca oleracea were significantly reduced by the extracts compared to the distilled water. Results confirmgermination of Descurainia sophia seeds was inhibited at concentrations greater than 2.5%. Accordingly germination rate and radicle lengths of Descurainia sophia were significantly reduced by the extracts compared to the distilled water. Therefore, extract of rue might be useful as natural herbicides and might also contain numerous growth inhibitors that could be used for the development of biological herbicides.
H. Saderi; P. Owlia; M. Radmanesh
Volume 22, Issue 4 , February 2007, , Pages 366-372
Abstract
Staphylococcus aureus is one of the common bacteria in human infection. Increasing antibiotic resistance in Staphylococcus aureus lead to vast usage of antibiotics and releasing new drugs to market. In this respect, medical herbs with antimicrobial effect have had important role in traditional medicine. ...
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Staphylococcus aureus is one of the common bacteria in human infection. Increasing antibiotic resistance in Staphylococcus aureus lead to vast usage of antibiotics and releasing new drugs to market. In this respect, medical herbs with antimicrobial effect have had important role in traditional medicine. The purpose of this study was evaluating antimicrobial effect of hydroalcoholic and aqueous extracts of seed and stem of Ruta graveolens plant on Staphylococcus aureus (ATCC 25923). Agar diffusion method was used and relative MIC and MBC of effective extracts were determined with macro dilution method. The change of number of bacteria in the presence of extract with concentration equal to MBC was also determined for different period of times. The results showed that unlike aqueous extract, the hydroalcoholic extracts of Ruta graveolens have no effect on Staphylococcus aureus. MIC and MBC of aqueous extract of stem were 10% and 20%, whereas, aqueous extract of seed were measured 10% and >30%, respectively. In the presence of aqueous extract of stem of Ruta graveolens, bacterial population was reduced gradually. Since Ruta graveolens is a native and abundant plant species in Iran; it is likely to produce drugs against Staphylococcus aureus infection which require further research.
P. Owlia; H. Saderi; S.A. Tabatabaei Nezhad; M. Naseri; M.B. Rezaee
Volume 20, Issue 2 , July 2004, , Pages 171-180
Abstract
Pseudomonas aeruginosa is important opportunistic pathogen and to produce widespread infections by numerous virulence factors. Treatment of Pseudomonas infection is very difficult, because resistance to antibiotics is increasing. The purpose of this study was evaluation of antimicrobial effects of extract ...
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Pseudomonas aeruginosa is important opportunistic pathogen and to produce widespread infections by numerous virulence factors. Treatment of Pseudomonas infection is very difficult, because resistance to antibiotics is increasing. The purpose of this study was evaluation of antimicrobial effects of extract of Ruta graveolens on P. aeruginosa (28852ATCC). MIC and MBC of extract were evaluated and change of number of bacteria in the present of 1%, 2%, 4% and 8% of R. graveolens extract was compared with the change of number of bacteria in the present of 0.00078 and 0.00156mg/ml gentamicin. The results showed that MIC and MBC of R. graveolenc extract were equal of 10% of concentration. Comparison of change of number of bacteria had shown that the effect of 8% of extract of R. graveolens after 4 h is equal of 0.00156mg/ml gentamicin after 2h. According to the results we can probably to use of R. graveolens against Pseudomonas infections, but we need more study and research.
