M.R. Ardakani; B. Abbaszadeh; M.H. Assare; F. Paknezhad; A. Kashani; M. Layegh Haghighi
Abstract
One of the methods of natural resource management is utilization of inefficient lands and use of resistant plant species in hard conditions. In this study, sampling from natural habitat in Arak (Markazi province) was conducted in 2009 at 3 growth stages including growth, full flowering and maturity using ...
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One of the methods of natural resource management is utilization of inefficient lands and use of resistant plant species in hard conditions. In this study, sampling from natural habitat in Arak (Markazi province) was conducted in 2009 at 3 growth stages including growth, full flowering and maturity using plots with replication. In full flowering stage, plant height, number of tillers, big and small diameter, root length, root weight, chlorophyll, plant dry weight, soluble sugar content, proline, sodium, potassium, magnesium, calcium, chlorine and iron were measured. Mean comparison of morphological characters showed that the largest values of plant height, number of tillers, canopy cover, total shoot and flowering shoot were recorded for the region (locality 3) with less salinity (EC= 7.6 dS/m). The largest values of root length, root weight and essential oil percentage at growthing, full flowering and maturity stages were also recorded for locality 1 with high salinity (EC= 11.7dS/m). Locality 1 showed the highest content of soluble sugar, proline, sodium, potassium, magnesium, calcium, and chlorine. Locality 3 had the highest total content of chlorophyll, chlorophyll a and b while the highest iron content was related to locality 2. Results of correlation showed that there was negative significant relationship between plants height with essential oil percentage in full flowering stage. Significant correlation was also observed between soluble sugar and proline, magnesium, calcium and chlorine. There was significant negative correlation between soluble sugar and total chlorophyll 2. According to the results, Camphorosma monspilica L. is one of the salt tolerant plant species probably with medicinal and forage values.
B. Abaszadeh; M.B. Rezaiee; F. Paknejad
Abstract
This research was performed in order to investigate flowering shoot yield, morphological characters, percentage and yield of essential oil and relationship between characters of two ecotypes of Mentha longifolia var. amphilema L. at Research Institute of Forest and Rangelands for six years in 1999 to ...
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This research was performed in order to investigate flowering shoot yield, morphological characters, percentage and yield of essential oil and relationship between characters of two ecotypes of Mentha longifolia var. amphilema L. at Research Institute of Forest and Rangelands for six years in 1999 to 2004. This experiment was conducted as a split plot on time by using of randomized complete block design (RCBD) with three replications. Main and sub factors were ecotypes and years, respectively. The results showed significant differences between leaf oil yields, flower oil yields and flower yields in different ecotypes. There were also significant differences between all evaluated characters (plant height, leaf long, leaf width, stem diameter, lateral shoot, yield of flower, percentage and yield of flower essential oils, leaf yield, percentage and yield of leaf essential oils, yield of flowering shoots and their oils) at 0.01% level of probability in different years. There was significant relationship between total essential oil with yield of flowers and leaves and their essential oils at 0.01%level of probability. There was significant relationship between yield of flowering shoot with leaf long and lateral stem at 0.05% level of probability, and between yield of flowering shoot with leaf yield, essential oil percentage and yield of flower, leaf yield, essential oil percentage and yield of leaf at 0.01% level of probability. The results of stepwise showed that the model compounded of 4 characters: leaf oil yield, flower oil percentage, flower yield and stem diameter. The results of path analysis revealed that leaf oil yield (0.907) had a high direct effect on the dependent (total essential oil yield) variable. So results of path analysis revealed that flower oil percentage (0.019) had a high direct effect on the dependent variable after, yield of leaf essential oil.
M.R. Ardakani; B. Abbaszadeh; E. Sharifi Ashourabadi; M.H. Lebaschi; F. Packnejad
Volume 23, Issue 2 , August 2007, , Pages 251-261
Abstract
In order to study drought stress effect on quantitative and qualitative features of balm (Melissa officinalis L.) a research was conducted under field condition in Karaj, Iran in 2005. Experiment was conducted using Randomized Complete Block Design with 4 replications. Treatment included T1 (non stress), ...
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In order to study drought stress effect on quantitative and qualitative features of balm (Melissa officinalis L.) a research was conducted under field condition in Karaj, Iran in 2005. Experiment was conducted using Randomized Complete Block Design with 4 replications. Treatment included T1 (non stress), T2 (80%FC), T3 (60%FC), T4 (40%FC) and T5 (20%FC). Effect of drought stress on shoot yield, essential oil yield, percentage of essential oil, leaf and stem yield, height, tiller number, length and width of leaf, stem diameter and internodes was significant (α=0.001). Effect of drought stress on number of lateral stem was not significant. Comparison of treatment means showed that highest shoot yield was related to T1 (non Stress) (6469kg/ha), highest essential oil (12.970 kg/ha) and highest essential oil percentage (0.3012%) was related to T4 (40%FC) and T5 (20%FC), respectively. Highest height (65.32 cm), leaf length (6.27 cm) and width (4.58 cm) were related to T1 (non stress). Highest stem diameter was related to T5 (20%FC). It could be concluded that moderate drought stress is beneficial for balm essential oil.
