mehdi mohammad zamani; vali rabiyei; mohammad ali nejatian
Abstract
Drought, as an abiotic stress inflicts destructive and harmful effects on plants at their different growth stages. Plants react differently to drought. Among their reactions is the production of such osmolytes as Proline and Glycine Betaine. It seems that, through exogenous application of these materials, ...
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Drought, as an abiotic stress inflicts destructive and harmful effects on plants at their different growth stages. Plants react differently to drought. Among their reactions is the production of such osmolytes as Proline and Glycine Betaine. It seems that, through exogenous application of these materials, plant resistance to drought stress can be increased. Therefore, a factorial experiment, based upon a randomized complete block design of four replications was performed on four grape cultivars (Khushnav, Peykani, Perlette, and Flame Seedless). Grapevines, under drought stress, were irrigated by 70% of the required water. Proline (10 mM) and Glycine Betaine (15mM) were sprayed on the grapevines at four growth stages (before flowering, flowering, sour cluster and veraison). Results indicated that Proline and Glycine Betaine significantly (P
Milad Javanmard; Hossein Ali Asadi-Gharneh
Abstract
Dog Rose (Rosa canina L.) is a wild native species in Iran, with a significant genetic diversity. The purpose of this research was to study quantitative and qualitative characteristics of saturated and unsaturated fatty acids dog rose ecotypes in five habitats of Isfahan province in 2014-2015. Oil was ...
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Dog Rose (Rosa canina L.) is a wild native species in Iran, with a significant genetic diversity. The purpose of this research was to study quantitative and qualitative characteristics of saturated and unsaturated fatty acids dog rose ecotypes in five habitats of Isfahan province in 2014-2015. Oil was extracted from seeds by using soxhlet apparatus; the fatty acid composition of oil was characterized and quantified using gas chromatography (GC) in the laboratory of Islamic Azad University, Isfahan (Khorasgan) Branch. According to the results, the highest and the lowest oil percentage were observed in ecotypes from Miyankish-kashan (11.43%) and Aghcheh-Buin va Miyandasht (7.89%), respectively. The highest amount of unsaturated acids including linoleic, linolenic, oleic, palmitoleic and arachidonic acid were obtained in Kopehjamshid-Tiran (55.00%), Zarneh-Buin va Miyandasht (28.38%), Sadeghiyeh-Fereydonshahr (22.58%), Aghcheh-Buin va Miyandasht (0.22%) and Zarneh-Buin va Miyandasht (0.12%), respectively. Sadeghiyeh-Fereydonshahr had the lowest amounts of saturated acids of palmitic (3.69%) and stearic acids (1.77%), respectively. The ecotypes from Kopehjamshid-Tiran, Zarneh-Buin va Miyandasht, and Sadeghiyeh-Fereydonshahr had the lowest amount of myristic acid. Seed fatty acid analysis showed the minimum amount of total unsaturated fatty acids in Sadeghiyeh- Fereydonshahr (93.87%) and its minimum in Aghcheh-Buin va Miyandasht (91.51%), respectively. In this research, seed oil of Dog rose ecotypes from the studied habitats have unique nutritional characteristics and medicinal properties due to a high percentage of unsaturated fatty acids and an appropriate omega-6 to omega-3 ratio.
Hojatollah Rostami; Seyed Jalal Tabatabei; Faribourz Zare Nahandi; Mohammad Rahman Pour Azar
Abstract
Boron toxicity usually occurs in arid and saline soils. Among all the pollutant'sresource, irrigation water is the most important factor in boron elevating in the soil.Modification of boron-rich soils is difficult and in this case, resistant varieties can playan important role in increasing the cultivation ...
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Boron toxicity usually occurs in arid and saline soils. Among all the pollutant'sresource, irrigation water is the most important factor in boron elevating in the soil.Modification of boron-rich soils is difficult and in this case, resistant varieties can playan important role in increasing the cultivation in areas with high boron level. To assessthe effects of different concentrations of boron on nutrient concentration and itsdistribution in olive plants, a factorial experiment was carried out in completelyrandomized design with six levels of boron (0,2, 10, 20, 30, 40 and 50 mg L-1) and twovarieties (Konservolia and Amygdalolia) with four replicates. Results showed that withincreasing the levels of boron, the level of nitrogen, phosphorus, potassium and calciumdecrease significantly. With increasing of boron concentration to 50 mg L-1, nitrogenlevels decreased to 47% in Amygdalolia compared to control. Boron concentrations inall plant parts increased with increasing boron level in the nutrient solution. Describeddiagnostic symptoms of boron toxicity were appeared 45 days after beginning of theexperiment in the concentrations of (30, 40 and 50 mg L-1) and in Konservolia appeared75 days after beginning of the experiment in the concetrations of 40 and 50 mg L-1.
Ali shahi gharelor; Zabiholah Zamani; Mohammad Reza Fattahi Moghadam; Naser Boozari; Abdolah Khadivi Khoob
Volume 41, Issue 4 , March 2011, , Pages 359-373
Abstract
Some Cerasus sub-genus wild species that are used as rootstocks in sour and sweet cherry propagation can also be employed in breeding programs. The aim of this study was to clearly evaluate some characteristics of subgenus Cerasus genotypes to be used in the future cherries' breeding programs. In order ...
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Some Cerasus sub-genus wild species that are used as rootstocks in sour and sweet cherry propagation can also be employed in breeding programs. The aim of this study was to clearly evaluate some characteristics of subgenus Cerasus genotypes to be used in the future cherries' breeding programs. In order to evaluate some morphological characteristics of the vegetative parts as well as seeds to categorize Cerasus sub-genus wild species and genotypes, 38 characteristics were evaluated on 28 genotypes of four species of this sub-genus collected from eight regions. The species were: P. avium L., P. mahaleb L. (Eucerasus section), P. incana Pall., and P.microcarpa Bioss. (Microcerasus section). Analysis of variance of the studied characteristics were found as significant among genotypes. Results of simple correlation analysis showed the existence of significant, positive as well as negative correlations among some such important characteristics as tree height, leaf area, as well as the length and weight of seed. Also, factor analysis showed that tree height, leaf area, leaf shape, length of petiole, length of seed, seed weight, shape of seed tip and seed thickness were characteristics that constituted the main factors. The effective characteristics became categorized within seven factors, accounting for 85.71% of total variance. Cluster analysis was performed using these seven factors and genotypes in the distance of about 25 were divided into two main groups (Microcerasus and Eucerasus) and within the distance of 19 they were divided into four groups consisting of the species. In the distance of 10 there appeared a higher number of groups (8 groups), resulting from intra-species differences of plants collected from different regions, such that genotypes of same species from one region often categorized with each other. Tri-plot analysis using three main factors could also clarify the location of genotypes and differentiote the species from each other.
alireza faramarz pour; mojtaba delshad; masoud parsi nejad
Abstract
High yield of top quality crop is a prerequisite for profitable production of greenhouse produced cucumber. On the other hand, because of water deficit in Iran it is necessary to economize in this scarce and valuable input. An experiment was carried out in the experimental greenhouse of University College ...
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High yield of top quality crop is a prerequisite for profitable production of greenhouse produced cucumber. On the other hand, because of water deficit in Iran it is necessary to economize in this scarce and valuable input. An experiment was carried out in the experimental greenhouse of University College of Agriculture and Natural Resources, University of Tehran to optimize water use in soil culture of greenhouse cucumber, applying drip irrigation as a irrigating system and tensiometer as the moisture measuring instrument. The aim of this research was to determine a suitable starting point of soil water potential at which irrigation pumps would start to operate and while growth and yield of greenhouse cucumber would be at its optimal state. Three water potentials for starting the irrigation system (-25, -45, and -65 centibar) were compared. Results showed the volume of applied water was 1.24 times higher in the -25 centibar treatment than in the -45 one and 2.03 times higher than that in -65 centibar treatment. The treatments had significant effect on water use efficiency. Decrease in volume of applied water resulted in increase of water use efficiency. Water use efficiency was 48 percent higher in -65 centibar treatment in comparison with -25 centibar and 46 percent higher in the -65 centibar as compared with -45 centibar treatment. Increase in soil water enhanced the vegetative growth. Yield quality was acceptable and not seriously affected by different soil moisture levels. Because of better water use efficiency of -65 centibar treatment as compared with the other ones and no serious change in fruit quality and quantity parameters , it can be concluded that a pump starting point of -65 centibars is recommendable for soil based greenhouse cucumber irrigation.
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