Showing 16 results for Movahhedi Dehnavi
Zahra Javadipour, Mohsen Movahhedi Dehnavi, Hamidreza Balouchi,
Volume 1, Issue 2 (vol. 1, no. 2 2013)
Abstract
Abstract:
Enhanced leaf proline, soluble sugar and soluble protein contents with sever salinity stress can improve stomatal conductance and Relative water content. This can inhibit dry matter depletion due to salinity stress, so can be used for screening of safflower cultivars under salinity stress. To evaluate the changes in leaf proline, soluble sugars, glycinebetaine and protein content of six spring safflower under salinity stress, a pot experiment was conducted as factorial base on completely randomized design with three replications in summer 2011 in Yasouj University. The first factor included of four salinity levels as zero, 75, 150 and 225 mM. Second factor included of six safflower cultivars, as Local Isfahan, Spinned Sina, Isfahan 14, Goldasht, Padideh and Sina 411. Traits such as leaf Proline, glycinebetaine, soluble sugars and soluble protein content and leaf relative water content were measured. Interaction of salinity and cultivar was significant for all measured traits. Salinity stress significantly increased leaf proline and soluble sugar content. Relative water content decreased significantly by salinity, so that maximum of it (91.03%) was seen in Padide at control. Sina 411 due to having more leaf soluble sugar and RWC at 225 mM salinity level and Goldasht due to having more proline and glycinebetaine content was more tolerance cultivars than the others, and Esfahan14 that had the least soluble sugar, Relative water content and glycinebetaine content introduced as less tolerant cultivar.
Rouhollah Saeidi Aboueshaghi, Alireza Yadavi , Mohsen Movahhedi Dehnavi, Hamidreza Baluchi,
Volume 3, Issue 7 (vol. 3, No. 7 2014)
Abstract
One of the negative effects of water stress on growth and crop production is micronutrient uptake reduction by plant root. Therefore, to evaluate the effect of foliar application of Fe and Zn on some physiological and morphological characteristics of red bean (Akhtar cultivar) under drought stress this experiment was designed as a split plot in a completely randomized block design with three replications. Irrigation as the main plot at three level: Irrigation after 50, 75 and 100 mm evaporation from pan evaporation, and foliar application of micronutrients as the sub-plot at four level: foliar application with water (control), ferrous sulfate, zinc sulfate and a mixture of ferrous sulfate and zinc (each at a concentration 3/1000) was used. The results showed that delay in irrigation decreased leaf relative water content, chlorophyll content, plant height, number of lateral branches and seed yield and increased electrolyte leakage, leaf prolin and soluble sugar content in compared to control treatment. The effect of foliar application treatments was significant on all traits except leaf soluble sugars and plant height. The foliar application of Fe and Zn increased leaf relative water content, chlorophyll content, number of lateral branches and grain yield, and decreased electrolyte leakage and leaf prolin significantly. According to the results the foliar application of Fe and Zn improved physiological characteristics and stress tolerance in plants. Therefore, the plants were delayed in encountered with water stress condition, and produce a better performance.
Elnaz Shahbazi Zadeh, Mohsen Movahhedi Dehnavi, Hamidreza Balouchi,
Volume 4, Issue 11 (VOL. 4, no. 11, 2015 2015)
Abstract
In order to investigate the effects of foliar application of salicylic and ascorbic acids on some physiological characteristics of soybean (Glycine max L. cv. Williams) under salinity stress, a factorial pot experiment was conducted based on completely randomized design with four replications in the summer 2012 in the Yasouj University. Factors were included of four levels of salinity (0, 50, 100 and 150 mM NaCl) and four levels of foliar application (water, salicylic acid (3 Mm), ascorbic acid (1.5 mM) and combination of salicylic acid 3 mM and ascorbic acid 1.5 Mm. Results showed that by increasing salinity, photosynthetic rate, stomatal conductance, leaf chlorophyll, carotenoids and proteins content and leaf area significantly decreased. Leaf water use efficiency significantly decreased by increasing salinity levels, so that maximum leaf water use efficiency obtained in the first salinity level and foliar application of ascorbic acid 1.5 Mm. Foliar application of salicylic acid 3 mM and ascorbic acid 1.5 Mm were regarded as the best treatments for mitigation of salinity impact on soybean leaf because of being superior at the highest level of salinity (150 Mm NaCl) for the total leaf chlorophyll and carotenoids content, photosynthesis, water use efficiency and leaf relative water content
Parvaneh Hosseinzadeh, Ahmad Mohtadi, Mohsen Movahhedi Dehnavi, Tahmasb Asemaneh,
Volume 5, Issue 15 (Vol. 5, No. 15, 2016 2016)
Abstract
The use of micronutrient fertilizers, such as zinc on the condition of natural limiting factors such as salinity can be a great help in the development of medicinal plants cultivated in many parts of the country. In order to study the response of Plantago ovata to zinc application under salt stress, a pot experiment was conducted in 2013, as factorial experiment based on a complete randomized design with four replications. Treatments were five levels of salinity (0, 50, 100, 150 and 200 mM NaCl) and three levels of zinc (3.85, 7.7 and 11.55 µM ZnSO4). The interaction effects of salinity and zinc on physiological parameters of Plantago ovata were significant. With increasing concentration of zinc at zero, 100 and 150 mM salinity, leaf soluble sugar increased 50%. At zero and 200 mM salinity, with increase zinc concentrations levels of proline were increased over two times. Salinity increased the percentage of electrolyte leakage, so that by increasing the salinity level, leakage rate increased from 30 to 50%. Leaf soluble protein with increasing amounts of zinc, increased 36%. Generally use of 7.7 µM zinc in all of traits associated with a better outcome, and also, if consumed a large amounts of zinc in a high salt concentrations, the amount of compatible solutes (leaf soluble sugars and proline) increased. Therefore, to reduce the effect of salinity can be used zinc concentration in Hoagland solution up to 7.7 µM
Mohsen Movahhedi Dehnavi, Marzieh Jalil Sheshbahre,
Volume 5, Issue 18 (Vol. 5, No. 18, year 2017 2016)
Abstract
To study the effects of both drought stress and seed zinc and iron concentrations on the photosynthesis, chlorophyll fluorescence, and proline and carbohydrate accumulations in soybean (Glycine max (L.) Merr. cv. M9) leaf, a split plot experiment was carried out in 2012 based on a randomized complete block design with three replications in greenhouse conditions at Yasouj University. Drought stress, based on 70% depletion of the available soil water, was designated as the main-plot that included drought stress at the flowering, pod filling, and seed filling stages. Zinc and iron concentrations were designated as sub-plot factors that included high zinc, iron and zinc+iron contents of the seed, and control as well as seed soaking in distilled water, 3% zinc sulfate, 3% iron sulfate, and 3% zinc+3% iron sulfate solutions. Results showed that photosynthesis characteristics, net photosynthesis rates, stomatal conductance, and transpiration rates decreased under the drought stress conditions. Drought stress also led to decreased water use efficiency (WUEi). Moreover, leaf proline and soluble carbohydrate contents increased in response to drought stress. While PSII quantum yield reduced under drought stress, it increased under high seed zinc and iron concentrations. It was concluded that enhanced seed zinc and iron concentration was capable of ameliorating the impacts of drought stress on leaf proline and carbohydrate concentrations.
Dr. Mohsen Movahhedi Dehnavi, Mrs Marzieh Misagh, Dr. Alireza Yadavi, Mrs Mitra Merajipoor,
Volume 6, Issue 20 (vol. 6, no. 20, year 2017 2017)
Abstract
Micronutriens deficiency is prevalent in case of drought stress conditions, so complementary boron and zinc nutrition are important for crops to overcome drought stress. This study evaluated the effect of zinc and boron foliar application on physiological traits of sesame under different irrigation levels. The experiment was conducted as a split plot in a randomized complete block design with three replications at Fars Research Center for Agriculture and Natural Resources in 2013. The main factor included three irrigation levels (irrigation after 75, 110 and 145 mm evaporation from class A evaporation pan) and sub-factor included foliar spraying water, zinc sulphate, boric acid and application of the mixture of zinc sulphate with boric acid. Results showed that proline content of leaf significantly increased by foliar application of boric acid in 75 mm evaporation treatment and by boric acid and mixture of zinc sulphate and boric acid in 110 and 145 mm evaporation treatments. Maximum Glycinebetaine was acquired by foliar zinc sulphate application in all three irrigation levels. Foliar application of zinc sulphate and boric acid helped to obtain the highest leaf relative water content compared to control. Maximum seed zinc content in 75 mm evaporation treatment was obtained from zinc sulphate and the mixture of zinc sulphate with boric acid application. Generally, results showed that foliar application of zinc sulphate and boric acid improved physiological traits of sesame, especially under drought stress so the plant can tolerate the impact of drought stress better.
Dr Hamidreza Balouchi, Miss Fatemeh Amini, Dr Mohsen Movahhedi Dehnavi, Mr Mahmood Attarzadeh,
Volume 6, Issue 21 (vol 6, no. 21 2017)
Abstract
Heavy metals contamination of soil is a widespread global problem. One approach to reduce the accumulation of heavy metals in plants is using of different growing substrates. In order to investigate of different combinations substrate and heavy metals effect on physiological and biochemical traits in bean) cv. Sadri), an experiment was conducted. The first factor included four salt of heavy metals Cd(NO3)2, Pb(NO3)2, Ni(NO3)2 and CuSO4) with 50 mg kg-1 soil concentration and a control surface without metal and the second factor included of four levels of different growing substrates (control (farm soil), compost, vermicompost and poplar sawdust). The results showed that the heavy metals reduced the rate of photosynthesis and increased ion leakage, proline, soluble sugar and MDA compared to control. Use of vermicompost by developing the physical and chemical of soil statuse caused to increase chlorophyll content, instantaneous water use efficiency, stomatal conductance, photosynthesis rate and soluble sugar and also reduced the electrolyte leakage of pinto bean leaves. As a result, it could play a positive role to reduce the effects of heavy metal stress on plant physiological and biochemical traits of pinto bean.
Zohre Dehghan, Mohsen Movahhedi Dehnavi, Hamidreza Balouchi, Amin Salihi,
Volume 7, Issue 23 (vol.7, no. 23 2018)
Abstract
In order to evaluate the effects of salicylic acid on some physiological characteristics of common purslane (Portulacea oleracea L.) under NaCl stress, a factorial experiment based on completely randomized design with three replications was conducted in 2013 in research greenhouse of Faculty of Agriculture, University of Yasouj, Iran. Treatments were included of six levels of NaCl salinity (0, 60, 120, 180, 240 and 300 mM) and 3 levels of salicylic acid foliar application (0, 0.5 and 1 mM). In this experiment leaf proline, protein, chlorophyll, glycine betaine and total soluble sugars content, Fv/Fm and root to shoot weight were measured. Simple and interaction effects of salinity and salicylic acid were statistically significant for Fv/Fm, leaf protein, proline, soluble sugars, glycinebetaine and root and shoot dry weights. Salinity stress to 300 Mm, increased leaf proline (1.7 times) and glycine betaine (4.46 times). The using of salicylic acid decreased soluble sugars, proline and increased glycine betaine in most of the salinity levels. Salinity and salicylic acid in salinity levels decreased leaf protein. Salinity decreased root (75%) and shoot (72%) dry weights and also root to shoot ratio in higher salinity levels. Salicylic acid in lower salinity levels decreased root dry weight, but increased in higher salinity levels. Shoot dry weigh did not affected by salicylic acid. Generally, regarding to halophyte behavior of purslane, salicylic acid could positively effect on glycine betaine and root dry weight only in higher salinity levels.
Mohammad Azimi Gandomani, Hooshang Faraji, Mohsen Movahhedi Dehnavi, Amin Mirshekari,
Volume 7, Issue 23 (vol.7, no. 23 2018)
Abstract
In cold regions, potatoes are planted in spring. Challenges regarding potato cultivation in the areas facing spring frost, early fall cold and summer heat which has been investigated in this study. This search a factorial experiment in a randomized complete block design was conducted with three replications in 2015 and 2016 in Gandoman regian, Chaharmahal Bakhtiari Province. The first factor was three cultivar: Jelly, Fontaine and Bouren And the second factor, was combination of different treatments in six levels of calcium and jasmonic acid (at a concentration of 5 mM) incuding: 1- calcium + jasmonic acid before the stage of rhizome production (T1); 2- calcium + jasmonic acid after the stage of rhizome (T2); 3- jasmonic acid before the stage of rhizome production (T3); 4- jasmonic acid in after the stage of rhizome production (T4); 5- calcium from calcium nitrate source (T5); 6- control (no application of both factors (T6) ) were used. According to the results, both factors jasmonic acid and calcium had a positive impact on the examined cultivars, So that the Jelly had a better response rate than the other varieties. Amongst treatments, T1 in all traits except non-photochemical quenching had the highest average in all three cultivars. According to the results, it can be concluded that Jasmonic acid and calcium, reduced the adverse effects of thermal stress and nutrient deficiencies in both before and after stage of the rhizome production. In addition, higher positive effects obsorved when jasmonic acid and calcium compounds, were applied before the stage of the rhizome production.
Soghra Mohammadi, Ahmad Mohtadi, Mohsen Movahhedi Dehnavi,
Volume 8, Issue 32 (vol. 8, no. 32. 2020 2019)
Abstract
Plants need suitable amounts of micronutrients for optimal growth under stress conditions that can increase plant resistance to stress conditions such as salinity. In order to investigate the reaction of flax to iron application under salt stress conditions, a pot experiment was conducted as a factorial based on a completely randomized design with three replications. Salinity was determined by sodium chloride at five levels (0, 50, 100, 150 and 200 mM) and iron with 3 levels (25, 50 and 75 μM). With increased salinity, the amount of root and shoot sodium increased and the amount of potassium in the root and shoot decreased. The root iron concentration increased with increasing salinity up to 100 mM, and then decreased. The shoot iron concentration increased with increasing salinity up to 50 mM and followed by a decreasing trend. With increasing salinity, the amount of proline and leaf soluble sugar increased. At all salinity levels, iron had a significant effect on the amount of proline and soluble sugar. With increasing salinity up to 50 mM, the leaf soluble protein, antioxidant enzymes (peroxidase and superoxide dismutase) increased and then decreased. With increasing salinity, root and shoot dry weight decrease. To reduce the effect of salinity, the use of 50 and 75 μM iron in nutrient solutions is recommended.
Vahideh Rahmani, Mohsen Movahhedi Dehnavi, Alireza Yadavi, Hamidreza Balouchi, Mohammad Hamidian,
Volume 9, Issue 39 (vol. 9, no. 39 2020)
Abstract
To investigate physiological responses of black cumin to calcium silicate under salinity and drought stress condition with iso-osmotic potentials, a factorial experiment carried out based on the completely randomized design with three replications in research greenhouse of Faculty of Agriculture, Yasouj University, Iran in 2018. The first factor consisted of seven levels (salinity and drought stresses with iso-osmotic potentials of -2.4, -4.9 and -7.4 bar and control treatment) applied in Hoagland's solution. Salinity was applied with sodium chloride (NaCl) and drought with polyethylene glycol 6000 (PEG 6000). The results showed that at calcium silicate levels, salinity and drought stresses increased catalase and peroxidase activity, proline soluble sugars and malondialdehyde and also decreased leaf relative water content and leaf chlorophyll content. Silicate application mitigated the stress effects so that increased catalase and peroxidase activity, chlorophyll, proline and soluble sugars and decreased malondialdehyde content. In iso-osmotic potentials of drought compared with salinity, relative water content decreased but proline content, soluble sugars content, malondialdehyde content and catalase activity increased, indicating that black cumin sensitivity to drought is more than salinity based on physiological traits.
Zahra Solimaninya, Ahmad Mohtadi, Mohsen Movahhedi Dehnavi,
Volume 10, Issue 41 (vol. 10, no. 41 2021)
Abstract
Iran, is classified as arid and semi-arid regions of the world. Therefore, it is important to identify and planting of drought tolerant plants such as quinoa (Chenopodium quinoa Willd.). Zinc is involved in vital processes of the plant therefore; the supply of this element to the plant has a major impact on the quantity and quality of production. This study was conducted as a pot experiment to investigate the effect of zinc sulfate on quinoa under drought stress in a factorial randomized complete design with three replications. Drought stress was prepared with PEG 6000 at four levels (0, -3, -6 and -9 bar) and zinc element from zinc sulfate source with four levels (2 (control), 4, 6, and 8 μM) and in the four-leaf stage, the treatments were applied simultaneously to Hogland's nutrient solution for two weeks. According to the results, an increase in drought stress caused a 68% increase in catalase compared to the control. Maximum leaf soluble protein at -6 bar level with 8 μM zinc sulfate level, highest total soluble sugars and leaf proline at the highest level of drought and 6 μM zinc sulfate were observed. With increasing drought, chlorophyll a (34%), chlorophyll b (187%) and leaf carotenoid increased two-fold but decreased shoot dry weight (38%) and leaf area (37%) compared to control. In general, the use of zinc reduced the damage caused by drought stress by improving the level of osmolytics, and to alleviate the effect of drought stress, the use of 6 μM zinc sulfate in nutrient solutions is recommended.
Fatemeh Shojaeian Kish, Alireza Yadavi, Mohsen Movahhedi Dehnavi, Amin Salehi, Mohammad Hamidian,
Volume 10, Issue 44 (vol. 10, no. 44 2021)
Abstract
In order to investigate the effect of biofertilizer on physiological characteristics and nutrient concentration in linseed under irrigation withholding at different growth stages, a farm experiment conducted as split plot base on randomized complete block design with three replication at research field of Yasouj University in 2017. Irrigation regimes (full irrigation, irrigation withholding at beginning of flowering until beginning of podding, irrigation withholding at beginning of podding to end of maturity) and bio-fertilizer application at four levels (mycorrhiza fungi, Phosphate Barvar2, mycorrhiza arbuscular fungi + Phosphate Barvar2 and non-application of bio-fertilizer) were considered as the main and the sub plots, respectively. The results showed that the highest concentration of phosphorus (8.27 g.kg-1) and potassium (4.20 g.kg-1) in the leaf was observed in the treatment of mycorrhiza bio-fertilizer. In both stages of flowering and seed filling, irrigation withholding compared to full irrigation increased the soluble sugars, malondialdehyde, but reduced the relative water content and soluble protein of leaf. The highest leaf prolin cintent (11.63 µmol.g-1) was observed in both biofertilizer combination treatments in condition of Irrigation withholding at beginning of podding to end of maturity. Application of both type of biofertilizer increased soluble sugar concentration, soluble protein and reduced malondialdehyde levels. The highest grain yield was observed from application of mycorrhiza+ phosphate Barvar2.
The results indicate that linseed is sensitive to drought stress in the encapsulation to ripening stage (58% reduction). This damage modified by application of biofertilizer trough improving the absorption of nutrients and changing the concentration of osmolites.
Tayebeh Ataei Nasab, Hamidreza Balouchi, Ali Moradi, Mohsen Movahhedi Dehnavi,
Volume 11, Issue 50 (vol. 11, no. 50 2022)
Abstract
Germination and seedling establishment are sensitive and important stages in the life cycle of plants that are affected by abiotic stresses, especially drought and salinity stresses. This study was conducted to investigate the effects of osmotic potential (due to sodium chloride and polyethylene glycol) on germination and biochemical indices of Salicornia sinus-persica Akhani spec. nov.Akhani seeds in 2020 in the Agriculture Laboratory of Yasouj University of Agriculture in a completely randomized design with three replications of 50 seeds. A separate experiment was performed in which the first experiment consisted of 13 levels of osmotic potential (zero, -0.3, -0.6, -0.9, -1.2, -1.5, -1.8, -1.2, -2.4, -2.7, -3, -3.3 and -3.6 MPa) which were made of polyethylene glycol and the second experiment included 13 salinity stress levels with osmosis similar to the first experiment (zero, 62, 122, 187, 249, 311, 368, 435, 498, 560, 622, 684 and 746 mM) were used to make sodium chloride. The results showed that the trend of salicornia seed germination indices in salinity and drought stresses had a constant trend up to the level of about -1.2 (249 mM) and -0.6 MPa, respectively, and then with a decrease in the osmotic potential of germination percentage, root and stem length, root and shoot dry weight and seedling vigor length and weight index showed a decreasing trend so that the slope of this decreasing trend was higher in drought stress compared with salinity stress. From osmotic potential of 1.2 MPa onwards, in salinity thirst, seed biochemical parameters such as proline content, malondialdehyde content and sodium element increased whereas potassium element decreased and in drought stress, proline and malondialdehyde content showed an increasing trend. In general, Salicornia seeds were more sensitive to drought stress than salinity stress.
Goodarz Bagherifard, Amin Salehi, Mohsen Movahhedi Dehnavi, Mohammad Sedghi Asl, Alireza Yadavi,
Volume 13, Issue 60 (vol. 13, no. 60 2024)
Abstract
St. John's wort (Hypericum perforatum L.) is a medicinal plant that is more than 2000 years old. Drought stress is one of the most limiting environmental factors in the growth and production of plants. Plant symbiosis with mycorrhiza fungi and foliar spraying of essential elements can be one of the most effective solutions to deal with drought stress. This research also aims to evaluate the effect of mycorrhizal fungus and zinc sulfate foliar spraying on some biochemical traits and economic yield in St. John's wort under different irrigation regimes in a split factorial experiment with a basic randomized complete block design in three repetitions carried out during the three cropping years of 2018, 2019 and 2020. The main factor is irrigation regimes at three levels (100, 75 and 50% of irrigation needs); sub-factors were ZnSO4 foliar spraying at three levels (0, 3 and 6 per thousand) and inoculation with an AMF (Funneliformis mosseae) at two levels (inoculated and uninoculated). The results showed that the triple interaction of irrigation regimes + foliar spraying + mycorrhiza in all three years had a significant effect on chlorophyll content, proline, soluble sugars, malondialdehyde and economic yield. Increasing irrigation stress had a reducing effect on chlorophyll content, economic yield, and the relative water content of leaves, but on proline, soluble sugars and malondialdehyde had an increasing effect. At each stress level, the highest economic yield was obtained in the treatment of 6 per thousand foliar spraying + inoculation with mycorrhizal fungi. Generally, foliar spraying of zinc sulfate + mycorrhiza increased the content of chlorophyll, sugar solvents and the relative water content of the leaf, caused the adjustment of the stress conditions and increased the resistance of the plant against drought, and by improving the quantitative and qualitative biochemical traits, it increased the economic yield of the St. John's wort plant.
Somaye Rafie, Alieza Yadavi, Mohsen Movahhedi Dehnavi, Hamidreza Balouchi,
Volume 13, Issue 63 (vol. 13, no. 63 2024)
Abstract
In order to investigate the effect of biofertilizers and zinc foliar application on the physiological characteristics and nutrient concentration of black cumin under different irrigation regimes, a split factorial experiment was conducted in the form of a randomized complete block design with three replications in Zarghan, Fars province, in 2017 and 2018. Irrigation regimes (providing 100, 75 and 50% of the irrigation water requirement) as the main plot and biofertilizer (mycorrhiza, Phosohate Barvar2, mycorrhiza + Phosohate Barvar2, no biofertilizer) and foliar application (zinc foliar application, no foliar application) were considered sub-plots. In both years of the experiment, the reduction of irrigation water decreased the nitrogen concentration of aerial organs (45%), chlorophyll a (70%), soluble protein (37%), relative water content (40%), biological yield (46.6%), and grain yield (56%) of black cumin. However, it increased traits such as proline (1.35 times), soluble sugar (60%), and electrolyte leakage (1.1 times). Biofertilizer application, especially in combination (mycorrhiza+ phosphate Barvar2), and zinc foliar application increased all the traits mentioned except electrolyte leakage. So in 50% irrigation, the combined application of biofertilizer compared to no application of biofertilizer increased the grain yield by 46% and 49.7% in 2018 and 2019, respectively. The results showed that the application of biofertilizers and zinc foliar application moderates the negative effects of drought stress in black cumin by improving nutrient absorption and physiological characteristics.
