Z. Noroozi; M. Moslehisahd; M.H. Salehi Surmaghi
Abstract
Rosa foetida Herrm. is one of the native Rosa species in Iran known as Iranian yellow rose. The main growth area of this plant in Iran is the western parts especially Kurdistan. It is used for kidney disorders treatment and as a source of vitamin C. The aim of this study was to evaluate the ability of ...
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Rosa foetida Herrm. is one of the native Rosa species in Iran known as Iranian yellow rose. The main growth area of this plant in Iran is the western parts especially Kurdistan. It is used for kidney disorders treatment and as a source of vitamin C. The aim of this study was to evaluate the ability of free radical scavenging, determination of phenolic compounds, and antimicrobial activity of aqueous and ethanolic extracts of yellow rose flowers. The antioxidant activity and total phenolic compounds of extracts of yellow rose were determined using ABTS free radical scavenging assay and Folin-Ciocalteu method, respectively. Dilution method was used to determine the minimal inhibitory concentration (MIC) against Salmonella enterica, Bacillus cereus and Staphylococcus aureus. The results showed a significant positive correlation between free radical scavenging percentage and the concentration of the extracts (P<0.05). In the range of 0.39-12.50 mg ml-1 concentrations, the aqueous extract had more antioxidant activity than ethanolic extract (P<0.05). The 50% inhibitory concentration (IC50) of aqueous and ethanolic extracts was calculated to be 217.069 and 223.116 μmol, respectively. The results of total phenolic compounds test in extracts showed a positive and significant relationship between the concentration of the extracts and their phenolic compounds content, and the aqueous extract contained more phenolic compounds as compared with the ethanolic extract (P<0.05). The highest antimicrobial effect of aqueous and ethanolic extracts was observed against Staphylococcus aureus and Salmonella enterica, respectively (P<0.05). Due to the favorable antioxidant and antimicrobial properties of this plant, its use as a natural additive in the food industry is recommended.
S. Karami; M.R. Sabzalian; M. Rahimmalek; Gh. Saeidi; L. Khodaee
Abstract
In order to investigate the possible influence of seasonal variation on the percentage of seed oil and total phenolic content in seeds and leaf of safflower, three populations (19 accessions) including 6 cultivars of cultivated species (Carthamus tinctorius), 4 genotypes of wild species (C. oxyacanthus) ...
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In order to investigate the possible influence of seasonal variation on the percentage of seed oil and total phenolic content in seeds and leaf of safflower, three populations (19 accessions) including 6 cultivars of cultivated species (Carthamus tinctorius), 4 genotypes of wild species (C. oxyacanthus) and 9 genotypes of F5 generation derived from inter-specific cross (C. tinctorius× C. oxyacanthus) in two sowing dates, were evaluated. The results showed the effect of planting dates was significant on the percentage of seed oil and total phenolic content of seeds (p<0.01), except for leaf phenolic content. The percentage of seed oil and total phenolic content of seeds was higher in summer and spring planting dates, respectively. Also, in both planting dates, populations of cultivated and wild species had higher and lower percentage of seed oil, respectively. Whereas, percentage of seed oil in the populations derived from inter-specific cross was intermediate between cultivated and wild species, some genotypes in these populations had high percentage of seed oil and were in the range of percentage of seed oil observed for cultivated genotypes. Also, the total phenolic content of seeds in the genotypes with colored seed coat (black-seeded genotypes derived from the cross and wild genotypes) was higher comparing with white seed coat genotypes (cultivars and white-seeded genotypes derived from interspecific cross), then it seems that not only planting dates but also seed coat and genetic purity of loci controlling seed coat color may affect total phenolic content of seeds. In general, results of this experiment indicated that there is possibility of improving seed oil percentage and total phenolic content of seeds as the two factors with medicinal properties in Carthamus spp. using variation in planting dates and also inter-specific crosses. Furthermore, safflowerleaf is a rich source in total phenolics in comparison with seed and can be used in pharmaceutical industries.
K.A. Saeedi; R. Omidbaigi
Volume 25, Issue 1 , May 2009, , Pages 113-119
Abstract
Kelussia odoratissima Mozaff. is a plant belonging to the Apiaceaefamily which has got high nutrition and medicinal value and is extensively used for treatment several diseases. The objective of this research was determination of content and composition of fatty acids, total phenolic content and essential ...
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Kelussia odoratissima Mozaff. is a plant belonging to the Apiaceaefamily which has got high nutrition and medicinal value and is extensively used for treatment several diseases. The objective of this research was determination of content and composition of fatty acids, total phenolic content and essential oil content on K. odoratissima seed. Extraction of total phenolics content carried out by Folin-Ciocalteu method and the absorbance at 750 nm was measured by spectrophotometer. Results showed that total phenolic content was 288.15 mg GAE/g DW in seed. Hydro distillation by Clevenger-type apparatus was used for the extraction of essential oil. 2.1% essential oil was obtained in the experiment. Moreover, extracting from the seeds was done using Soxhelet method, in addition to measuring fatty acids by GC. The results showed K. odoratissima seeds contain 25% oil. The major fatty acid present in seeds (75.35% of % total) was C18:1 including petroselininc acid (C18:1(n-12)) and oleic acid (C18:1(n-9)). Other fatty acids were including linoleic acid (19.14%), palmitic acid (6.65%), stearic acid (1.9%) and linolenic acid (.95%).
