A. Zand; H. Aroiee; M.R. Chaichi; S.H. Nemati
Abstract
Water scarcity adversely affects many physiological and metabolic processes of the plants. To study the effects of drought stress and fertilization on some physiological characteristics, essential oil percentage and yield of spearmint, a field experiment was conducted at the Research Farm of the College ...
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Water scarcity adversely affects many physiological and metabolic processes of the plants. To study the effects of drought stress and fertilization on some physiological characteristics, essential oil percentage and yield of spearmint, a field experiment was conducted at the Research Farm of the College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. The experiment was conducted in a split plot arrangement based on a randomized complete block design with three replications. Treatments included three irrigation treatments (100%, 75% and 50% of plant water requirement) as the main plot and four fertilizer regimes including no fertilizer (control), chemical fertilizer (N+P), bio-fertilizer (rhizome inoculation with Azotobacter, Pseudomonas and mycorrhiza) and integration of biological fertilizer and 50% chemical fertilizer as the sub-plot. The results showed that all traits measured were significantly affected by the main and interaction effects of deficit irrigation and fertilizer. The content of chlorophyll a, chlorophyll b, carotenoids, total chlorophyll, percentage and yield of essential oil and yield decreased with increasing water stress while the rate of carbohydrate and proline as well as the electrolyte leakage percentage increased. Furthermore, the results showed that under 100% and 75% irrigation systems, application of chemical and integrated fertilizers improved the physiological characteristics, yield and percentage and yield of essential oil. Under 50% irrigation regime, the best performance was related to bio fertilizer.
M. Nasseri; Sh. Golmohammadzadeh; H. Aroiee; M.R. Jaafari; H. Neamati
Abstract
In the present study, solid lipid nanoparticles (SLNs) were used as carriers of essential oil to overcome the problem of essential oil use (evaporation and degradation of some active components in the presence of air, light, moisture, and high temperatures) and increase the essential oil efficiency for ...
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In the present study, solid lipid nanoparticles (SLNs) were used as carriers of essential oil to overcome the problem of essential oil use (evaporation and degradation of some active components in the presence of air, light, moisture, and high temperatures) and increase the essential oil efficiency for controlling Alternaria solani, Rhizoctonia solani and Rhizopus stolonifer. This experiment was tested in vitro on PDA in Nanotechnology Research Center, School of Pharmacy, University of Medical Sciences of Mashhad and Faculty of Agriculture, Ferdowsi University of Mashhad. The study was conducted in a completely randomized design (CRD) whit three replications. Solid lipid nanoparticles containing essential oil at four concentrations of 20, 50, 100, and 200 ml per liter were applied on the potato dextrose agar medium. SLN containing Zataria multiflora Boiss. essential oil (ZM-SLN) were prepared by high shear homogenization and ultra sound method. The size of SLNs containing essential oil was less than 200 nm, and PdI and ZP were calculated to be 0.483 and -42.6 mv, respectively. The SLNs were spherical in shape. According to the obtained results, the minimum inhibitory concentration of the essential oil for all three fungi was 200 μlL-1. However, the minimum inhibitory concentration of SLN-ZM for Rh. stolonifer and R. solani was 50μlL-1, and for A. solani, it was calculated to be 100μlL-1. Our results clearly showed that SLNs could be suitable carriers for the Zataria multiflora essential oil.
S. Shahriari; M. Azizi; H. Aroiee; H. Ansari
Abstract
In order to study the effects of different irrigation regimes and mulch types on growth parameters and essential oil content of peppermint (Mentha piperita L.), this experiment was performed in research field of Agricultural College of Ferdowsi University of Mashhad during 2010. The experimental design ...
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In order to study the effects of different irrigation regimes and mulch types on growth parameters and essential oil content of peppermint (Mentha piperita L.), this experiment was performed in research field of Agricultural College of Ferdowsi University of Mashhad during 2010. The experimental design was factorial in a randomized complete blocks design with four replications. Treatments included three irrigation levels (100, 80 and 60 percent of water requirements calculated by evaporation pan class A) and two mulch types (black plastic and wood chips) in comparison to control. Results showed that the effect of irrigation on fresh weight, dry weight, leaf relative water content, leaf area and essential oil yield was significant (p< 0.05). The effect of mulch on fresh weight, dry weight, leaf area, inter-node distance, number of branch and essential oil yield was significant (p< 0.05). Interaction between irrigation and mulch on inter-node distance, fresh weight, dry weight and leaf area was significant (p< 0.05). This study showed the highest dry weight yield per plant (38.35 g) and the highest essential oil yield (82.83 L.ha-1) on the first level of irrigation with the use of wood chips mulch. Also, there was no significant difference between the first level of irrigation and mulch wood chips with the third level of irrigation and mulch wood chips. The lowest dry matter yield (14.87 g) and the lowest essential oil yield (29.57 L.ha-1) were obtained at third level of irrigation and without mulch. In addition, wood chips was identified as the best treatment to reduce the stress caused by deficit irrigation. In conclusion, results showed that the use of wood chips as mulch and 60 % of irrigation water requirement resulted to the highest water productivity in Peppermint production.
