فهرست مطالب افشار فلاح ایمانی

In this split plot study, the morphological and phytochemical changes of Iranian Salvia (Salvia mirzayanii L.) under drought stress and cerium oxide nanoparticle treatment in a randomized complete block design with three replications were investigated. The main plot included drought stress at 4 levels of 25, 50, 75 and 100 (control) percentage of the field capacity (FC).  The sub-plot was foliar spray of Cerium oxide nanoparticle at five levels of non-consumption (control), 125, 250, 500 and 1000 ml/l. Essential oils were extracted from the organs using water distillation method and the compounds were separated and identified using GC/MS. The results showed that the interaction effect of conditions without drought stress × 1000 ml of nanocerium oxide compared to the control treatment had the greatest effect on increasing plant height (35%), root length (22%), root dry weight (14.9%), essential oil (19%), chlorophyll a (32%), chlorophyll b (31%) and catalase (16%). In addition, drought stress at the level of 25% in 125 ml nano cerium oxide decreased plant dry weight (12%), root length (13%), root dry weight (19%), essential oil percentage (10%), and chlorophyll a (14%). Based on the GS/MS results, decane compound (19.53%) in the condition without drought stress, the compounds of spatholeol (35.86%), docane (18.4%), butanic acid (19.8%) and linalool (25.03%) under condition of stress dryness of 50% field capacity and octane (13.76%) were included. Therefore, the concentration of 1000 mg/liter of cerium nanooxide had the greatest effect on improving the morphophysiological characteristics of Salvia. However, in the condition of 50% field capacity, the secondary compounds of spatholeol, dodecane, butanic acid and linalool were the highest, but in the condition of 75% of the field capacity, the highest amount belonged to the secondary compounds of octane, trimethyl and hexylisovalerate.

The current research was conducted with the aim to investigate the effect of salicylic acid on the growth traits, photosynthetic pigments and the amount of essential oil in Mentha piperita under drought stress. The factorial experiment was carried out in the form of randomized complete block design and with three repetitions. Factors included irrigation round at four levels (90 (control), 75, 45, and 20% field capacity) and salicylic acid at two levels (zero (control) and 60 ppm). The investigated traits included the plant height, number of lateral branches, length of lateral branches, number of nodes, fresh and dry weight of the plant, fresh and dry weight of the stem, chlorophyll a, b, and total, carotenoids, and essential oil percentage and yield. Results from this experiment showed that the effect of drought stress on all studied traits was significant at the statistical level of 1%. The mutual effect of drought stress on salicylic acid hormone for the length of lateral branches, fresh and dry weight of the plant, chlorophyll a, b, and total, and essential oil percentage and yield traits was significant. Stress caused a reduction in all traits except for fresh and dry weight of the stem; and the use of salicylic acid led to the reduced effects of stress such that the highest values of these traits were obtained from 60 ppm salicylic acid. Given the mutual effects, the highest values of essential oil percentage and yield obtained from 90% of field capacity and application of salicylic acid. Overall, the application of this hormone led to the improvement of qualitative and quantitative characteristics of Mentha piperita under drought stress.

To evaluate the effect of substrates on the growth of the medicinal plant, Rosemary, an experiment in the completely randomized design with eight treatments and four replications conducted in order to Rosemary plant growth. Plant substrates are critical factors in plants growth and their chemical components. Rosemary plants demonstrated significant differences in terms of vegetative growth properties. The maximum chlorophyll indicator was in the palm peat growing medium on the average of 1.54 milligram per liter and the minimum was in the coco chip growing medium on the average of 0.74 milligram per liter. The palm peat growing medium statistically demonstrated significant difference in compare to peat moss, coco peat, and coco chips mediums. The maximum values of chlorophyll a, b, as well as total chlorophyll, carotenoids and the total photosynthesis pigments acquired in the medium containing, peat moss 50% + sand 25% + perlite 25%. The palm peat appeared the maximum number of branches on the average of 6 and coco peat, the minimum numbers of branches on the average of 2, which from this point of view appeared significant statistical difference with coco peat. The palm peat medium containing, palm peat 50% + sand 25% + perlite 25%, due to the lower expense, characteristics such as very low pH-value and appropriate absorption of available water, is a suitable substrate for all plants in particular Rosemary. The application of traditional and locally prepared substrates elevated Rosemary growth.

In this research, the effect of drought (water deficit) stress and manure on vegetative body weight, essential oilyield, and physiological and morphological characteristics of Dragonhead (Dracocephalummoldavica) was investigated in a strip plot experimentunder pot conditions with 15 treatments and three replicationsfollowing complete randomized block design (CRBD)in the greenhouse of Islamic Azad University of Jiroft branch in 2009. Irrigation treatment, as a vertical factor,was selected based on field capacity (FC) level, including 75, 50 and 25 percent and manure level (0 – 10 – 20 – 30 – 40 t/ha) was applied as the horizontal factor. The results showed that the effect of water deficit stress for all morphological characters was significant (p