Showing 12 results for kazemi
Seyed Jaber Nabavi, Seyed Hassan Zali, Jamshid Ghorbani, Sayed Yahya Kazemi,
Volume 6, Issue 19 (vol.6,no. 19, Year 2017 2018)
Abstract
Juniperus communis L. from the plants growing in Iran and in the highlands in the valleys of Gorgan hall altitude pass, Hezarjarib and Talysh Spill distributed. In this study, the quality and quantity of active ingredients (extracts) J. communis aerial parts of the plant in different habitat Hezarjarib in behshahr was summer pastures. Branches covering height in 1950, 2050, 2150 and 2250 meters above sea level collected then dried in the open air under the shade. Extract of aerial parts of the plant as meo h-Extract (methanol) to identify compounds extracted from the extract by GC / MS were used. Data analysis was done using SPSS software to analyze and compare the characteristics of an extract from the analysis of variance (ANOVA) and T-test was used. 41 combined extract of aerial parts of the plant were identified, among which compounds are &alpha-pinene, sabinene, limonene, &beta- cubebene and diallyl phthalate, and also has the highest percentage of sites significant effect on the composition of phthalate diethyl and &beta-thujene in extract has branches. Compounds abieta-8,11,13-triene, d- (+) - carvone, hexadecanamide, elemol and trans sabinene hydrate were found only in one locality. Also, a significant correlation was observed between 12 combination with some soil elements.
Dr Shahryar Kazemi, Dr Esfandiar Farahmandfar, Dr Hemmatollah Pirdashti, Dr Mojtaba Mahmudi, Dr Valiollah Babaeizad,
Volume 7, Issue 26 (vol. 7, no. 26 2018)
Abstract
In order to evaluate the symbiotic effects of mycorrhiza-like fungi, Piriformospora indica (Pi), and mycorrhiza fungi, Glomus mosseae (Gm), on improving the chlorophyll pigments and chlorophyll fluorescence indices of maize (Zea mays L. cv. 'SC 704') under different levels of irrigation and triple super phosphate (TSP), a field experiment was conducted in a split factorial arrengment based on a randomized complete block design with three resplications. Two regions, Gharakhil (Ghaemshahr) and Bayekola (Neka) were investigated during the growing season of maize in 2015. Three different regimes of irrigation (100, 75 and 50% of crop water requirement) were used as the main plot, four levels of inoculations (control, Pi, Gm and Pi+Gm inoculations) and three levels of TSP (control, 50 and 100% of crop requirement) served as the subplots. The results indiacted that the amount of chlorophyll a, b, a+b and photochemical quantum yield of photosystem II (Fv/Fm) were significantly declined by limited irrigation regimes in both stations. The results also indicate a positive effect of fungi inoculation on Fv/Fm ratio resulted in significant increase of maximum fluorescence (Fm), particularly when maize seeds were inoculated with Pi and Gm together. Although, quantum yield of regulated non-photochemical (Y(NPQ)) increased by limited irrigation regimes, it appears that this parameter was significantly decreased by fungi inoculation treatments. This reduction was varied from 22% for Gharakhil to 33% for Bayekola, when applied Pi and Gm inoculation together. In general, the results indicated that these fungi could decrease the negative effects of water deficit stress on leaf chlorophyll pigments content and photochemical quantum yield of photosystem II by reducing damage to reaction centers of photosystem II. .
Ms Hajar Taheri Soudejani, Dr. Manouchehr Heidarpour, Dr. Mohammad Shayannejad3, Dr. Hossein Kazemian4, Dr. Hossein Shariatmadari, Dr. Majed Afyuni6,
Volume 7, Issue 27 (vol. 7, no. 27 2019)
Abstract
In order to investigating the effects of composts containing the natural zeolite- and the Mg-modified zeolites- (CNZ and CMZ, respectively) on some morphological and physiological traits, greenhouse experiments as a completely randomized design with eight treatments and three replications were performed. The results showed that the using compost especially containing Mg-modified zeolites increased plant diameter, plant height, root volume, root dry weight; stem dry weight, leaf dry weight in comparison to the compost free zeolite. With using CMZ amended soils, shoot dry weight increased 11.8% in comparison to the CNZ amended soils. The amount of nitrogen from CNZ- and CMZ-amended soils was approximately 34.68% and 54.47% higher, respectively than that of the free zeolite compost. Chlorophyll a, Chlorophyll b, total Chlorophyll and Carotenoids in CNZ- amended soil increased by 29.22, 44.29, 32.14 and 19.77% respectively, in comparison to the free zeolite compost. While in CMZ, they increased by 34.88, 76.45, 42.94 and 29.58%, respectively. Chlorophyll a, b and total Chlorophyll of leaves increases as the N supply increases. Correlation between nitrogen and chlorophyll content was about 80%. Overall, the use of MSW compost containing modified zeolite would be an efficient method to improve some morphological and physiological traits of corn plant.
Amir Moradi Sarabshelli, Sayyed Kamal Kazemitabar, Morteza Ebrahimi, Ghafar Kiani, Morteza Khan Ahmadi,
Volume 9, Issue 36 (vol. 9, no. 36 2020)
Abstract
St. John’s wort is a traditional herbal medicine used to treat depression and wound healing. Natural resource dependency and traditional cultivation methods often require months and years of time to reach medicinal plants. Establishing a hairy root suspension culture system can accelerate proliferation on a large scale, improve breeding and protect the species, but optimization and production on a large scale require an increase in the biomass and secondary metabolites of the root. In this study, the effect of different concentrations of myo-inositol (50, 75, 100, 125, 150, 175, 200, 225, 250, and 275 mg / l) were evaluated on biomass, phenol, flavonoid, DPPH activity and secondary metabolites in St. John's wort adventitious root in Agricultural Biotechnology Research Institute-Central Region of Iran. The results showed that 125 and 150 mg L-1 myo-inositol concentration had the highest dry weight, growth rate and growth ratio. The concentrations of 100 and 250 mg L-1 myo-inositol have been showed the highest and lowest amount of hypericin and pseudohypercin, respectively. From the viewpoint of production of hyperforin, the treatment with 100 mg L-1 myo-inositol was highest and the concentration of 125 mg L-1 had the least effect on the level of hyperforin in St. John's wort adventitious root culture. There was a significant difference between treatments in terms of phenol and flavonoid content, so the concentration of 75 and 225 mg L-1 and 75 mg L-1 myo-inositol had the highest amount of phenol and flavonoids. The DPPH activity changes were different between treatments, and the 50 mg L-1 showed the lowest amount of DPPH activity. However, the DPPH activity was highest in treatment with 75 mg L-1 myo-inositol concentration. Since the potential for stimulating secondary metabolites varies among cultures, elicitors, conditions for applying different treatments and other parameters, further research is needed to optimize better and more efficient guidelines.
Elham Iziy, Ahmad Majd, Mohammad Reza Vaezi-Kakhki, Taher Nejadsattari, Sakineh Kazemi Noureini,
Volume 9, Issue 39 (vol. 9, no. 39 2020)
Abstract
The increased effects of UV radiation are observed as a result of the reduced ozone layer with increasing atmospheric pollution. The aim of this study was to investigate the effects of UV radiations on growth and some physiological and biochemical parameters of Portulaca oleracea L. Experiments were performed under controlled greenhouse conditions using a completely randomized design with three replications. Purslane plants were treated with UV rays (UV-A at three times 20, 40 and 60 minutes, UV-B at three times 20, 40 and 60 minutes, and UV-C at five times 10, 20, 30, 40, 60 minutes). The results indicated that changes in root growth were not significant, but shoot length, wet and dry weight of plant increased compared to control in the three groups treated with 60 min UV-A, 60 min UV-B and 10 min UV-C. the treatment with 60 min UV-B increased the activity of defense enzymes, phenolic, flavonoid and antioxidant contents significantly more than the other UV treatments. In general, the results indicate that the purslane plant is sensitive to UV radiation. However, applying controlled UV light can provide a new alternative strategy to increase crop productivity, that is the same application of 60 min UV-B as a novel plant growth booster, in comparison with UV-A and UV-C treatment.
Nader Shahbazi, Seyyed Kamal Kazemitabar, Ghafar Kiani, Ali Pakdin Parizi , Pooyan Mehraban Joubani ,
Volume 10, Issue 45 (vol. 10, no. 45 2021)
Abstract
By examining physiological reactions related to salinity tolerance among different landraces and cultivars, tolerant and sensitive cultivars can be selected and used in breeding programs and cultivation development of this important oilseed. For this purpose, physiological reactions in eight different sesame genotypes in a factorial experiment based on a completely randomized design with the main salinity factor due to mixing Caspian Sea water with normal water at 3 levels (control, 6 & 9 dSm-1) and sub-factor 8 Sesame genotype including Babol, Dashtestan 2, Oltan, Pakistani, tn-78-389 and tn-78-393, Halil, Naz single-branched genotypes in three replications in pots in the greenhouse of the Plant Breeding Department of Sari University of Agricultural Sciences and Natural Resources in the year 2020 were examined. The results of this experiment showed that at salinity levels of 6 and 9 dS, among the eight different genotypes of sesame studied, Oltan cultivar with the highest amount of total dry weight (8.42 & 5.27 gr), amino acid proline (10.35 & 15 μmol/g fresh leaf weight), membrane stability index ( 82.65 & 74.14%), relative water content (81.33 & 69.33%), leaf chlorophyll and carotenoid content (based on mg/g fresh weight), chlorophyll a (0.74 & 0.7), total chlorophyll (1.12 & 0.95) and carotenoids (0.41 & 0.46) and antioxidant enzymes activities (based on enzyme unit per gram fresh weight), superoxide dismutase (18.22 & 29.05), ascorbate peroxidase (14.9 & 19.21), catalase (1.51), guaiacol peroxidase (4.8 & 5.43), potassium concentration (6.6%), sodium to potassium concentration ratio index (0.06 & 0.12) and the lowest amount of sodium ion concentration (0.41 & 0.7) were more tolerant of stress compared to other cultivars. In contrast, Pakistani cultivar with the lowest amount of total dry weight (5.12 & 2.14 gr), amino acid proline (5.86 & 6.7 μmol/g fresh leaf weight), membrane stability index (66.31 & 57.86%), relative water content (58 & 48.33%), leaf chlorophyll and carotenoid content (based on mg / g fresh weight), chlorophyll a (0.46 & 0.37), total chlorophyll (0.69 & 0.5) and carotenoids (0.25 & 0.27) and Antioxidant enzymes activities (based on unit of enzyme per gram of fresh weight), superoxide dismutase (11.61 & 10.31), ascorbate-peroxidase (8.61 & 8.78), catalase (0.84), guaiacol peroxidase ( 1.77 & 2.16), potassium concentration (3.68%), sodium to potassium concentration ratio index (0.59 & 1.12) and the highest amount of sodium ion concentration (2.15 & 2.57) were the most sensitive cultivar in stress tolerance compared to other cultivars. Based on the evaluated traits and the response of the studied cultivars to salinity stress, oltan was identified as a tolerant cultivar and Pakistani as a salinity sensitive cultivar compared to the other cultivars. Therefore, these cultivars can be suggested for use in future breeding programs to introduce new cultivars.
Sara Sharifi Soltani, Kamal Kazemitabar, Gholam Ali Ranjbar, , ,
Volume 11, Issue 47 (Vol. 11, No. 47 2023)
Abstract
Drought is one of the most serious threats in agricultural production worldwide, and climate changes is likely to exacerbate this threat. In order to evaluate the drought tolerance of different castor ecotypes, a factorial experiment was conducted in a completely randomized design with three replications in Sari Agricultural Sciences and Natural Resources University. The first factor included 22 castor ecotypes and the second factor was drought stress with 5 levels, full irrigation, four levels (irrigation was cut at the primary of spike growth) (11, 22, 33, 44 days after Irrigation cut off). Experimental traits included the activity of the antioxidant enzymes catalase, guaiacol peroxidase and ascorbate peroxidase, the biochemical activity of malondialdehyde (MDA), proline content, plant height, stem diameter and number of leaves. Cluster analysis classified the ecotypes into three clusters under normal and drought stress conditions.The results showed that the activity of catalase, ascorbate peroxidase, guaiacol peroxidase, Malondialdehyde and Proline content under drought stress conditions of the third group (Tolerant) compared to the first group (Sensitive) were increased 81.5, 81.87, 70.27, 80.05, and 81.87, respectively. On the other hand, the differences between tolerant and sensitive groups at stress conditions in plant height, stem diameter and number of leaves were 74.74, 80.50 and 83.38%, respectively. The highest correlation under drought stress conditions was observed between Catalase and Ascorbate peroxidase (r = 0.997) and the lowest non-significant correlation was observed between proline and plant height (r = 0.292). According to the results, in terms of the studied traits 5 and 19 ecotypes were introduced as drought tolerant ecotypes.
Behnaz Kazemi, Monireh Ranjbar, Zahra Rezayatmand, Ali Mohammad Ahadi,
Volume 11, Issue 48 (vol. 11, no. 48 2022)
Abstract
An experiment was performed to examine the effect of methyl jasmonate foliar spray with concentrations (10, 1, 0.1 mM and 0) and titanium nanoparticles with concentrations (40, 30, 20 µM and 0) on the physiological indices of Savory. The field experiment was carried out in Isfahan in the summer of 2019. This experiment was conducted in a factorial manner based on completely randomized design and 3 replications with 2 factors and 4 levels in two harvest times of 24 and 48 hours after the last treatment. According to the results of this research, compared to the control treatment, methyl jasmonate treatments resulted in a significant increase of 1 percent in leaf area, leaf fresh weight, leaf dry weight and length of aerial part in 48 hours after the last treatment. Titanium nanoparticle treatments resulted in a significant increase at the level of 1 percent in leaf width, leaf area, leaf dry weight, leaf fresh weight and length of the aerial part of the plant. Similarly, the flavonoid content increased significantly at a concentration of 30 μM at the level of 1 percent. In combined treatments that were conducted at 48 hours after the last treatment, there was a significant increase in leaf dry weight, leaf area, leaf fresh weight and length of aerial part at the level of 1 percent and a significant increase at the 5 percent level in flavonoid content and activity of dismutase enzyme. It was concluded from the current research that 48 hours after the last treatment is the best time for harvesting. The use of both concentrations of 1 or 0.1 mM methyl jasmonate with 40 μM nanoparticles and 10 mM methyl jasmonate with 30 μM nanoparticles affects the plant positively and can increase the growth and biochemical factors of Savory.
Roohollah Nikfekr, Seyed Kamal Kazemitabar, Gholamali Ranjbar, Seyed Hamidreza Hashemi Petroudi, Pouyan Mehraban Jubani,
Volume 12, Issue 56 (vol. 12, no. 56 2023)
Abstract
Sesame is one of the oil plants that has been cultivated for a long time. Unfortunately, the low yield of sesame and the easier production of other oil seeds have caused less attention to be paid to the cultivation of this plant, so it is necessary to take action in the direction of producing high-yielding cultivars. Soil salinity is an essential factor that affects the growth, development, and productivity of almost all land plants, including sesame. Increasing the concentration of salt in the plant growth environment leads to an increase in Na+ and Cl- ions in plants and induces oxidative stress, osmotic stress, and ion toxicity. Seed germination and early seedling growth are critical stages in the plant life cycle that largely determine crop yield. In this experiment, the sesame plant was investigated in three stages: germination (germination indices), seedling (phenotypic characteristics of seedling, SOD, CAT activities, MDA and H2O2 content), and maturity stage. Therefore, 21 different sesame cultivars were studied for genetic diversity and heritability of traits. Also, the relationship between traits in three stages and the influence of morphological traits in the farm environment were measured. Cultivars were grouped using these traits, and cultivars tolerant and sensitive to salinity stress were identified. The cultivars studied were divided into two groups, and high-yielding genotypes such as Oltan, 159, Naz Chandshakhe, Yellowwhite, Maghan, 418, American, and Chinese were placed in one group. To obtain new recombinant, the genotypes of distant clusters are used as parents for the hybridization program. The use of selected traits in the sesame breeding program increases yield.
Seyyedeh Vida Heydargholizadeh Hasankola, Nadali Bagheri, Nadali Babaeian Jelodar, Seyyed Kamal Kazemitabar,
Volume 12, Issue 57 (vol. 12, no. 57 2023)
Abstract
Drought stress is the limiting factor for rice growth in rice fields. One of the approaches to dealing with the negative effects of stress on crop production is the use of drought-tolerant cultivars. This research was conducted to investigate the effect of drought stress on changes in antioxidant enzyme activity and amino acid accumulation in a number of rice genotypes. In this research, the number of 6 rice genotypes along with the tolerant (Binam) and sensitive (IR64) control cultivars at the seedling stage in the form of a completely random basic design in 3 replications and 4 drought levels (from polyethylene glycol 6000) zero (Yoshida), -0.5, -1 and -1.5 times were investigated in hydroponic culture medium. The results of the analysis of variance showed that there is a significant difference between the examined cultivars and the level of enzyme activity also increased, and genotypes such as Danesh and LP8, which were more tolerant to drought, had a higher level of enzyme activity. The increase in activity in tolerant genotypes has been greater than that in sensitive cultivars. In the analysis of the amino acid profiles of the genotypes introduced above, the activity of glutamic acid, alanine, arginine, leucine and lysine increased significantly with the increase in drought stress. While no significant accumulation of amino acids was observed in the sensitive IR64 genotype under stress. Therefore, it can be concluded that the accumulation of amino acids is closely related to the drought tolerance of tolerant genotypes.
Esmaeil Gholinezhad, Shahryar Kazemi, Bakhtiar Lalehgani,
Volume 13, Issue 59 (vol. 13, no. 59 2024)
Abstract
This experiment aims to investigate the effect of foliar spraying of polyamines on growth traits, root characteristics, physiological traits and seed yield and yield components of the Camelina plant at different levels of salinity stress, a pot factorial experiment based on a completely randomized design was done in 2021 at Payam Noor University. The first factor was the salinity stress with Urmia lake water at three levels (0, 15 and 30 dS/m) and the second factor was foliar spraying polyamines at four levels (spermine, spermidine, putrescine and control (spraying with water)). The results showed that the salinity stress of 30 and 15 ds/m in comparison with the control decreased root diameter (16 and 4 percent), root dry weight (39 and 17 percent), root volume (43 and 31 percent), relative leaf water content (60 and 23 percent), chlorophyll a concentration (57 and 13 percent), chlorophyll b concentration (61 and 21 percent), the number of capsules per plant (52 and 25 percent), the weight of 100 seeds (30 and 5 percent), seed yield (52 and 10 percent), and biological yield (38 and 10 percent), respectively. But salinity stress at 30 and 15 ds/m increased leaf temperature (12 and 6%), carotenoid concentration (56 and 46%), and leaf proline concentration (44 and 40%), respectively. Foliar spraying with spermine, spermidine and putrescine in comparison with no foliar spraying, enhanced the number of capsules per plant (26, 23 and 24%), weight of 100 seeds (28, 17 and 12%) and seed yield (38, 8 and 21 percent), respectively. On the other hand, it reduced the effects of salinity stress. Therefore, it seems that the Camelina plant can tolerate salinity up to 15 dS/m. Foliar spraying with polyamines can be a good approach to improving the tolerance, growth and yield of Camelina under salinity stress conditions.
Hossein Kazemi, Atefeh Sabouri, Ali Aalami, Amin Abedi,
Volume 13, Issue 60 (vol. 13, no. 60 2024)
Abstract
Sorghum (Sorghum bicolor L. Moench), known for its high photosynthetic efficiency and biomass production, is utilized for various purposes, including food, animal feed, fiber, and fossil fuels. Salinity stress stands as a significant abiotic stressor that exerts numerous adverse effects on growth and crop yield. In order to investigate the physiological and morphological response of sorghum to salinity stress, a pot experiment was conducted in the greenhouse and laboratory of the University of Guilan, Iran, following a factorial split-plot design based on a randomized complete blocks design with three replications in 2021. The sorghum cultivars, Fuman and Sepideh, were subjected to salinity stress at four different levels, including control, 75 mM, 125 mM, and 175 mM NaCl, in the 4-5 leaf stage, with subsequent measurements taken at 24, 48, 72, and 96 hours after stress exposure. The results of the variance analysis demonstrated that the interaction between cultivars Fuman and Sepideh, various levels of salinity stress, and sampling times had a significant effect on the measured indices at the 1% level. Mean comparisons of treatment combinations indicated that proline, soluble sugars, ascorbate peroxidase, peroxidase, electrolyte leakage, and root length traits increased under salinity stress, showing a positive correlation with stress intensity. In contrast, chlorophyll a, chlorophyll b, carotenoid, protein, plant height, relative water content (RWC), leaf area, plant fresh weight, and plant dry weight decreased under salinity stress, with these traits declining as the stress level increased. In terms of the percentage of changes, soluble sugars had the greatest effect on stress, while RWC had the least impact. Based on the results, it can be concluded that sorghum employs mechanisms such as increasing the activity of antioxidant enzymes, proteins, and osmotic regulation through important osmolytes such as proline and soluble sugars to achieve tolerance to salinity stress. Additionally, the findings revealed that the Foman cultivar, known for its higher tolerance, exhibited a more favorable response to reducing oxidative damage caused by salinity stress compared to the Sepideh cultivar, making it a potential candidate for areas exposed to salinity stress through the implementation of appropriate management strategies.
