جستجوی مقالات مرتبط با کلیدواژه « Rosemary » در نشریات گروه « باغبانی »

Due to the distinctive physicochemical properties of the carbon nanotubes (CNTs) in enhancing photosynthesis efficiency, the aim of this study was to evaluate the effect of single-walled CNTs on morphological and physiological characteristics of rosemary. The experiment was performed in a completely randomized design with 10 concentrations of carbon nanotubes in 5 replications. The effect of CNTs on the morphological and physiological characteristics of rosemary was significant. Data means comparison showed that the highest height was observed at a concentration of 90 mg L-1 and the lowest was in control. The lowest regeneration percentage was in control. However, the results showed that the most and least leaf number was obtained from CNTs at the rate of 90 mg L-1 and control. The 90 mg L-1 concentration of CNTs had the highest leaf area and fresh weight. Also, the means comparison of physiological traits showed that the highest and lowest amount of chlorophyll a, chlorophyll b, carotenoid, flavonoid and total phenol were observed in CNTs at the rate of 90 mg L-1 and control, respectively. It is hoped that this method will be used for regeneration and the use of secondary metabolites in other plants.

Correct pruning is one of the most important factors in growing plants particularly trees and shrubs, in the landscape. The present study was conducted to assess the effects of pruning intensity and nitrogenous fertilizer on physiological and morphological characteristics and wilting percentage in rosemary plant. A factorial experiment was arranged in a completely randomized design with five levels of pruning (no pruning, half of current –year branch prune, complete pruning of current-year branch, half one-year-old branch prune and complete pruning one-year old branch) and two levels of nitrogenous fertilizer (0 and 200 kg.ha-1) with three replications. For this purpose used 18-month-old rosemary cuttings grown in the greenhouse. Stem growth was measured during six months. Number of lateral branches, root and shoot fresh and dry weights, root volume and length, chlorophyll fluorescence, relative water content (RWC), ion leakage (EL) and proline were evaluated. The growth of rosemary plants was reduced with increased pruning intensity and fresh and dry weight of shoot and number of lateral shoots  were increased with useing nitrogenous fertilizer.With increased pruning intensity, RWC, ion leakage percentage and proline content were increased and chlorophyll fluorescence decreased. RWC and proline were increased with the application of nitrogenous fertilizer. The highest wilting percentage (77.77%) of plants was observed in complete pruning of one-year old branch with nitrogen fertilizer.

In order to study the effect of aqueous extract and essential oil of six plant species belong to Lamiaceae and Apiaceae family on controlling some important pests and qualitative characteristics of melon fruit (Khatuni cultivar), an experiment was conducted at the Boshruyeh region (Geographical coordinates: longitude 57°27' E and latitude 33°53' N) during the cropping season 2016-17.  The experimental design was a randomized complete block design with 20 treatments and 3 replications. The treatments consist of (chemical control, No-applied aqueous extract and essential oil, aqueous extract of Asafetida-Ferula 8, 10 and 12%, essence of Rosemary, Lavender, Peppermint, Fennel and Cumin 2, 2.5 and 3%. The results showed that the effect of treatment on White flies, Alfalfa weevils. Mite and healthy and damaged fruits was significant. Comparison of mean values revealed ineffectiveness of aqueous extract and essential oil on the population of whitefly, but the effects of 12% aqueous extract of Asafetida-Ferula on Alfalfa weevils population, and 3% concentrations of rosemary and black cumin on the mite population were significant. But, these treatments had not significant different with chemical control. The highest number of healthy fruits and the lowest number of damaged fruits were observed in treatments with 12% aqueous extract of Asafietida-Ferula and 3% essential oil of black cumin and peppermint.

Rosemary (Rosmarinus officinalis L.) is a plant of the Lamiaceae family which is propagated by semi-hard wood cuttings in the summer. Current study was carried out to investigate the effect of stem diameter in various rooting media. Treatments included three rooting media: perlite, perlite+ cocopeat and sand; and three stem diameters: 1-2 mm (herbaceous cuttings), 3-4 mm (semi-hardwood cuttings) and 5-7 mm (hardwood cuttings). Rooting percent, number of roots and roots length were measured. The result showed that the effect of rooting media, stem diameter and their interaction were significant (P≤ 0.01). The highest percentage of rooting, maximum number of roots and root length were observed in the treatment with 1-2 mm stem diameter; hence rooting in herbaceous cutting were significantly more effective than the semi-hardwood cuttings and hardwood cuttings. In comparing the rooting media, the highest percent of rooting (48%) was observed on perlite-cocopeat substrate, which was not significantly different to perlite substrate. However, the maximum number and highest root length was attained in the perlite substrate. Therefore, it is recommended to the greenhouse owners, in order to propagate high quality rosemary, use herbaceous cuttings on perlite substrate