Identification, introduction, ecology and ethnobotany
Khadije Talebi ghadikolai; Hossein Moradi; Razieh Azimi Etergale
Abstract
Background and purpose: The Peganum hamala L. medicinal plant belongs to the Nitrariaceae family and is a native species of the Peganum genus in Iran. P. hamala possesses a wide range of unique biological and medicinal properties due to its valuable secondary metabolites like flavonoids, alkaloids, anthraquinones, ...
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Background and purpose: The Peganum hamala L. medicinal plant belongs to the Nitrariaceae family and is a native species of the Peganum genus in Iran. P. hamala possesses a wide range of unique biological and medicinal properties due to its valuable secondary metabolites like flavonoids, alkaloids, anthraquinones, and volatile oil compounds. Despite the widespread distribution of P. hamala in northern Iran, limited studies were conducted on this plant species adapted to arid and semi-arid ecological conditions. Therefore, in this regard, one of the goals of this research is to evaluate the ecological impact and the effect of fixed latitude and different geographical longitudes of the growing place along with the rhizosphere on some structural and yield traits of P. hamala under nine altitude gradients located in Mazandaran.Methodology: To investigate the effect of ecological factors on the structural traits (wet and dry weight of vegetative organs, fresh and dry weight of root, dry matter percentage of vegetative organs, dry matter percentage of root, arch, plant height, plant canopy area, diameter and length of root, and maximum length of stem and crown) and yield traits (fruit diameter, fruit yield, fruit weight, seed weight, average number of seeds, number of fruits, and percentage of seeds in the fruit) of P. hamala, samples of whole plants in the seeding stage were collected from nine different altitude gradients in regions of Khatirkoh (700 and 1000 m), Chahardangeh (1300, 1500, 1700, and 1900 m), and Gadook (2100, 2300, and 2500 m), with three replications along with the substrate soil in a completely random design.Results: Based on the results of the analysis, yield traits show a positive correlation with atmospheric Based on the analysis, yield traits are positively correlated with atmospheric factors. Furthermore, among the structural traits, stem vegetative traits are positively correlated with precipitation, evaporation, and radiation at the probability level of 5%. They also have a negative correlation with relative humidity at 1%. The increase in height above sea level causes an increase in humidity and a decrease in temperature in the Gadook and Khatirkoh areas. In contrast, it causes decreased humidity and temperature in the Chahardangeh area. Also, crop yield decreases with increasing altitude in all three regions. The maximum yield of the product is observed at 2100 m and 1500 m altitudes. The increase is due to increased silty materials, moisture, EC, and pH. The altitude slope shows a positive correlation with grain yield at 1%. In each region, as height above sea level increases, the root length and diameter increase and decrease, respectively. Stem and root vegetative traits show a negative correlation with seed traits. Also, canopy level with plant height and maximum plant stem arch were positively correlated with plant yield at the 1% probability level. In general, based on the results, by increasing the height gradient from sea level, decreasing the temperature, and increasing the humidity and nutrients of the soil, there is a decrease in vegetative growth and an increase in crop yield. According to the performance feature regression model, as elevation increased, the amount of sand and clay, organic matter, and evaporation increased. This led to an increase in yield with a 60% determination factor. According to the regression model used, the effect of soil factors is higher than weather and climate. Therefore, climate factors change for this plant at a fixed latitude.Conclusion: According to the results of examining the structural and yield traits of the collected P. hamala ecotypes, yield traits increase with the increase in altitude gradient, the amount of sand and clay, organic substances, evaporation, and decrease in temperature. On the other hand, vegetative traits decrease. Therefore, the Gadook region population is introduced as the superior ecotype with maximum yield traits among these studied regions in Mazandaran province.
A. Karimi Afshar; Gh. Kiani; H. Najafi; A. Baghizadeh
Abstract
Ajowan (Trachyspermum copticum L.), belonging to the Apiaceae family, is remarked as an important pharmaceutical and economical product. In order to determine the most important traits affecting grain yield, a split plot experiment was conducted in two conditions of irrigation (normal and drought stress) ...
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Ajowan (Trachyspermum copticum L.), belonging to the Apiaceae family, is remarked as an important pharmaceutical and economical product. In order to determine the most important traits affecting grain yield, a split plot experiment was conducted in two conditions of irrigation (normal and drought stress) as the main factor and 36 ecotypes of ajowan, belonging to nine different provinces of Iran, as a sub plot based on a randomized complete block design with two replications in 2015 and 2016 crop year in Kerman. The results of linear multiple regression analysis with stepwise method showed that in drought stress condition, number of umbrellas per plant, number of seeds per umbrella and essential oil yield, and in normal irrigation conditions, biological yield, 1000-seed weight and seed number per umbrella had the highest effect on grain yield, explaining 87% and 99% of the changes, respectively. Based on the results of path analysis, traits including number of umbels per plant under stress conditions and biological yield under normal conditions had the most direct effect on the grain yield and were recognized as the most important components of the grain yield. Therefore, these traits can be considered as main appropriate criteria for facilitating the indirect selection process and evaluating the seed yield potential in ajowan breeding programs.
A. Bidmeshki; M.J. Arvin; K. Maghsoudi
Abstract
Drought stress is the most important factor which negatively affects the plant growth and crop productivity in arid and semi-arid areas. The main problem which Iranian farmers are faced with cultivation of garlic (Allium sativum L.) is low production efficiency and performance. Therefore, in a field ...
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Drought stress is the most important factor which negatively affects the plant growth and crop productivity in arid and semi-arid areas. The main problem which Iranian farmers are faced with cultivation of garlic (Allium sativum L.) is low production efficiency and performance. Therefore, in a field experiment, the effect of IBA (0 and 100 ppm) was studied on growth parameters, bulb yield and allicin content of a local garlic cultivar under water deficit conditions (40% reduction of available water) in 2010 in Jiroft. The results showed that drought stress significantly reduced chlorophylls (a, b and total), caretenoids, anthocyanins, bulb and allicin yield, plant fresh weight, root fresh weight and also increased ion leakage. However, it had no significant effects on the percentage of allicin. In contrast, under non-stress conditions, IBA significantly improved most recorded parameters and reduced ion leakage and amount of anthocyanins while it had no effect on product quality and quantity under water deficit conditions. Compared with the controls, IBA increased plant fresh weight, bulb yield, and allicin respectively by 30%, 19% and 25%.
Z. Nemati Lafmajani; S.R. Tabaei-Aghdaei; M.H. Lebaschi; A.A. Jafari; A. Najafi Ashtiani; M. Daneshkhah
Abstract
In this research, effects of different traits on flower yield of 12 Rosa damascena Mill. accessions from different regions of Iran were analyzed under irrigation (control) and non-irrigation with and without mulch conditions. Randomized complete block designs were applied with three replications at Research ...
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In this research, effects of different traits on flower yield of 12 Rosa damascena Mill. accessions from different regions of Iran were analyzed under irrigation (control) and non-irrigation with and without mulch conditions. Randomized complete block designs were applied with three replications at Research Station of Homand Absard, Damavand, Iran. Flower weight, flower number, flower dry matter percentage, oil percentage, oil yield (per ha), petal weight, plant height and canopy cover were recorded. According to the correlation analysis, flower yield positively correlated with petal weight under non-irrigation with mulch, irrigated (control) and non-irrigation without mulch conditions. The statistical multivariate methods were also applied included multivariate linear regression and path analyses. Using three separate stepwise-regression analysis made it possible to determine the traits with most important impacts on the flower yield, under irrigation (control) and non-irrigation with and without mulch conditions. Flower number, petal weight, oil yield, and oil percentage under non-irrigation without mulch totally explained 91.7% of the variation among genotypes in the regression model. Petal weight, plant cover, and diameter of the species under irrigation (control) totally explained 98.6% of the variation among genotypes in the regression model. Oil percentage, oil yield, petal weight, plant height and flower number per ha under non-irrigation with mulch totally explained 90.6% of the variation among genotypes in the regression model. The results indicated that petal weight has the most direct impact on flower yield based on the path analysis and oil yield showed a negative direct effect on the flower yield under non-irrigation (without mulch) condition. Oil percentage, oil yield, petal weight, plant height and flower number per plant under non-irrigation with mulch, irrigated (control) and non-irrigation without mulch totally explained 95/5% of the variation among genotypes in the regression model. Petal weight had the highest direct impact on flower yield based on the path analysis under irrigation and non-irrigation conditions. Therefore, it is possible to consider petal weight as a magnificent character to improve flower yield of Rosa damascene.
F. Safikhani; H. Heydarye sharifabadi; S.A. Syadat; E. Sharifi ashorabadi; S.M. Syednedjad; B. Abbaszadeh
Volume 23, Issue 2 , August 2007, , Pages 183-194
Abstract
In order to investigate the effect of drought stress on yield and morphologic characteristics of Deracocephalum moldavica L. under field condition, this research wsa conducted in 2004-2005 at Alborz station. Experiment was carried out in a split plot with randomized complete block design with four replications. ...
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In order to investigate the effect of drought stress on yield and morphologic characteristics of Deracocephalum moldavica L. under field condition, this research wsa conducted in 2004-2005 at Alborz station. Experiment was carried out in a split plot with randomized complete block design with four replications. Main factors consisted of three plant populations of Deracocephalum moldavica L. which were collected from Tehran, Esfahan and Farse provinces. Subplots consisted of three level of drought stress (100%, 60% and 40% Fc). The results showed the effect of different plant population on morphological characteristics and yield were not significant. Effect of drought stress on length, cross and leaf surface, high plant, stem diameter, lateral shoot, length of highest internodes, weight of 1000 grain and flower shoot, leaf, stem and biological yield were significant. Mean of treatments showed that control (without drought stress treatments) at first and second years were 4126 and 4033 kg/ha of flower shoot and 4929 and 4921 kg/ha biological yield had significant differences with other drought levels. Mean of interaction effects of main and sub plots not showed significant difference for shoot flower production. Highest biological yield was related to controls of three plant population which were different to other treatments. It could be included from this investigation that mild stress could be applied in complete flower stage harvest.
