A. Khakpoor; M. Zolfaghari; K. Sorkheh
Abstract
Medicinal plant licorice (Glycyrrhiza glabra L.) has been used by the pharmaceutical industries for its important secondary metabolites. This study was carried out to determine the best harvest time for obtaining the highest content of extract, glycyrrhizin, total phenols, total flavonoids, and phenolic ...
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Medicinal plant licorice (Glycyrrhiza glabra L.) has been used by the pharmaceutical industries for its important secondary metabolites. This study was carried out to determine the best harvest time for obtaining the highest content of extract, glycyrrhizin, total phenols, total flavonoids, and phenolic compounds of licorice rhizome of the Behbahan area in Khuzestan province in two seasons of autumn and spring. The results of this study showed that the extract content of rhizomes and also glycyrrhizin, total phenols, and flavonoids content in autumn were higher than those in spring. The results of the independent T-test for glycyrrhizin, as an important and valuable secondary metabolite of licorice, showed a significant difference between autumn and spring seasons. Among the phenolic compounds studied, the highest amount was given to ferulic and coumaric acids in autumn, and the lowest one to caffeic acid in spring. Considering the importance of these secondary metabolites in the pharmaceutical, health and food industries, as well as the widespread use of phenolics, glycyrrhizin, and flavonoids of licorice in herbal drugs, it is necessary to determine the best time for the highest production and accumulation of these metabolites in the licorice rhizomes to take an effective step to enrich the industries mentioned.
E. Hormozinejad; M. Zolfaghari; M. Mahmoodi Sourestani; N. Enayati Zamir
Abstract
In order to investigate the effects of Plant Growth Promothing Rhizobacteria (PGPR) on growth, yield, flowering and biochemical content of marigold (Calendula officinalis L.), an experiment was carried out in a randomized complete block design with five treatments and four replications during the 2015-2016 ...
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In order to investigate the effects of Plant Growth Promothing Rhizobacteria (PGPR) on growth, yield, flowering and biochemical content of marigold (Calendula officinalis L.), an experiment was carried out in a randomized complete block design with five treatments and four replications during the 2015-2016 in the Faculty of Agriculture of Shahid Chamran University of Ahvaz. The treatments included Entrobacter closea R13, Entrobacter closea R33, Pseudomonas sp., chemical fertilizers (NPK), and control (no fertilizer). The results of the experiment showed that the highest flower number per square meter, leaf number, stem branches, receptacle diameter, and capitol diameter were observed in E. closea R13, while the highest capitol fresh and dry weight was found in E. closea R33. Moreover, the most leaf phosphorus and nitrogen content, and leaf chlorophyll and carotenoids content were observed in the plots incubated with E. closea R13. The highest and lowest total phenolic content was found in the Entrobacter treatment and control, respectively. Mean comparison of treatment effects showed that the effects of E.closea R33 were similar to E. closea R13 in most parameters and there was no significant difference between them. According to the positive and additive effects of PGPR on calendula plants, the PGPR could be recommended as an alternative to chemical fertilizers to reduce the consumption of chemical fertilizers and guaranty the production of medicinal plants, free of chemicals.
M. Momeni Monfared; M. Mahmoodi Sourestani; M. Zolfaghari; M. Malekzadeh
Abstract
In order to evaluate essential oil yield and composition of fifteen accessions of basil (Ocimum basilicum L.), an experiment was conducted in the experimental field of department of horticultural science of Shahid Chamran university of Ahvaz as a randomized complete block design with fifteen treatments ...
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In order to evaluate essential oil yield and composition of fifteen accessions of basil (Ocimum basilicum L.), an experiment was conducted in the experimental field of department of horticultural science of Shahid Chamran university of Ahvaz as a randomized complete block design with fifteen treatments (accessions) and three replications. Accessions were green (Yazd, Canada, Ramhormoz, Jahrom, Shiraz, Shahr rey, Dashtestan and Neyshabour), purple (Jahrom, Shiraz, Ramhormoz and Dashtestan), Golkhosheai, Thyrsiflora and Goldomaghrabi. Leaf yield, essential oil content, yield and components were evaluated. Results showed that there was a significant difference among accessions (P≤0.01) for measured traits. The maximum leaf yield was recorded in Golkhosheai and Goldomaghrabi accessions (613.6 and 550.33 gr.m2). The highest essential oil content was observed in Thyrsiflora (3.16%), Golkhosheai (2.93%) and Goldomaghrabi (2.07%) accessions and the highest essential oil yield was obtained in Golkhosheai, Thyrsiflora and Goldomaghrabi accessions (17.95, 14.72 and 11.42 gr.m2, respectively). According to essential oil analysis by GC-MS, approximately 32 compounds were identified in the essential oil of various basil accessions. Main essential oil compositions were linalool (0.12-68.43%), methyl chavicol (0-55.28%), geraniol (0-33.39%), geranial (0-42.09%), limonene (0-18.03%), methyl eugenol (0.38-4.85%), beta-caryophyllane (0-4.57%) and cubenol (0-6.22%). Essential oil of purple (Jahrom, Shiraz, Ramhormoz and Dashtestan) and Thyrsiflora accessions had the highest amount of methyl chavicol. Essential oil of Golkhosheai, Goldomaghrabi and Canada accessions was rich in linalool. Essential oil of green (Yazd, Canada, Ramhormoz, Jahrom, and Neyshabour) accessions had more geraniol and geranial than other accessions. Overall, the results of this study showed that each accession had a unique characteristic that can be used in pharmaceuticals, cosmetics and food industries.
