Showing 7 results for Ghasemi
Fatemeh Ghasemi, Reza Heidari, Rashid Jamei, Latifeh Poorakbar,
Volume 1, Issue 1 (12-2014)
Abstract
To assess nickel-induced toxicity in plants, Zea mays seeds were germinated and cultured on nutrient solution with nickel concentrations of 0, 50, 100 and 200 μM for a period of two weeks. Its effects on the growth, Hill reaction and photosynthetic pigments content were then investigated. The fresh and dry weight of leaves and roots increased in 50 μM nickel, but decreased in 100 and 200 μM. The decline in length of root and shoot were observed by increasing nickel concentration. According to the results, root and shoot showed differential growth response to various nickel concentrations. Nickel concentrations up to 100 μM caused increase in the content of chlorophyll a, but resulted in decrease at 200 μM nickel. No significant changes in chlorophyll b and carotenoids contents were observed. The rate of Hill reaction, as the ability of chlorophyll a in the reaction center of PSII680 to split water, decreased by increase in nickel concentration.
Mansour Afsharmohammadian, Mohsen Sharifi, Seyyede Narjes Abolghasemi, Narjes Mohammad,
Volume 2, Issue 2 (9-2015)
Abstract
Dittrichia graveolens (Asteraceae) is an aromatic and annual plant. The aim of this study is the evaluation of total phenolic, flavonoid and flavonol content, the antioxidant activities and other important medicinal secondary metabolites of this plant. According to the results, the total amount of phenols and flavonoid in different plant organs of D. graveolens were different in a way that the content of total phenols and flavonoid in the flowers and leaves were significantly more than the stems and roots. The content of flavonol in the flowers, leaves and stems were not significantly different, and the lowest content was observed in the roots. In addition, the linear and significant correlation coefficient was found between the antioxidant activity and the phenolic compounds in the extracts of different organs of the plant. The main components in different extracts were Bornyl acetate and α-Cadinol in flower extract, Borneol, Bornyl acetate, Thymol and Calarene in leaf extract and PMAMOMPE, Safrole, Carvacryl acetate, Vulgarone B and Bornyl acetate in root extract. On the whole, the current results compared with the results of other researchers indicates the remarkable impact of plant habitat on the quality and quantity of pharmaceutical compounds in different organs of the plant
Somayeh Ghasemi,
Volume 4, Issue 4 (12-2017)
Abstract
This study aimed to recycle sawdust and blood powder using Eisenia foetida earthworm and investigate some biochemical changes of these waste materials during vermicomposting. Blood powder was mixed with sawdust in proportions of 0, 5 and 10% and the mixture was allowed to pass through earthworm guts for four months. At intervals of 1, 2, 3, 4, 6, 8, 12 and 16 weeks, the biological activity (i.e. basal respiration), pH, EC, total organic carbon, total nitrogen and C:N ratio were determined. The results showed that the period of time, the concentration of blood powder and the interaction between these two significantly affected all parameters. As the incubation time increases, the cumulative amount of mineralized carbon, the total nitrogen and EC increase in all vermicompost treatments whereas organic carbon, C:N ratio and pH decreased. Adding blood powder to sawdust bed resulted in an increase in carbon mineralization rate, EC and total nitrogen while pH, organic carbon and C: N ratio decreased. At the end of incubation time, the treatment of sawdust with 10 % blood powder resulted in the highest amount of released CO2 (142.1 µg C g-1), EC (3.7 dS m-1) and total nitrogen (2.24 %) and the lowest amount of pH (6.6), organic carbon (22.5 %) and C: N ratio (12.4). According to the results, the process of vermicomposting can be used as a safe method for the disposal of sawdust and blood powder
Hadiseh Esfade, Ghadireh Mirabolghasemi, Mahnaz Azarnia,
Volume 6, Issue 2 (8-2019)
Abstract
Diabetes mellitus is known to be resistant to insulin, to dysfunction of beta cells and to increase liver glucose production. Poor glucose control during hyperglycemia causes damage to the tissues and creates dangerous consequences, such as infertility. Chronic hyperglycemia has harmful effects on the growth of follicles, which is essential for normal female sexual function. Metformin is the most widely prescribed drug in diabetes, but chemical drugs, despite their undeniable benefits, have destructive effects, so alternative strategies for current modern diabetes medications are essential. Herbal medicines are widely used by patients, based on non-medical recommendations and as blood-glucose-lowering agents, including the nettle. Nettle contributes to lower plasma glucose levels by secreting insulin and increasing the proliferation of beta cells in the pancreas. Therefore, the aim of this study was to determine the effect of nettle extract as a supplement of metformin on ovarian tissue of diabetic model. In this experimental study, 30 female Wistar rats were used. Animals were weighed and randomly divided into 5 groups (n=6). 1) control group 2) diabetic group who were diabetic with intravenous injection of alloxan (150 mg / kg) 3) diabetic group + Nettle root extract (150 mg / kg) 4) diabetic + metformin (150mg / kg) 5) Diabetic group + Metformin(150 mg / kg) + Nettle root extract(150 mg / kg). At the end of treatment, the effect of metformin and nettle root extract on ovarian tissue and biochemical factors such as blood glucose and sex hormones were compared and the data obtained were analyzed by SPSS. Hyperglycemia and body weight loss after metformin and nettle root increased for 4 weeks. Simultaneous administration of metformin and extracts of nettle root significantly increased the primordial, primary, secondary, and corpus luteum and reduced the atretic follicles and significantly increased FSH, LH and testosterone levels as compared with metformin alone. The results of this study showed that the root of nettle with its antioxidant compounds and other properties could be a complement to metformin with a corrective effect on hyperglycemia and the improvement of ovarian disorders.
Fatemeh Ghasemian,
Volume 6, Issue 4 (12-2019)
Abstract
One of the most important factors related to male fertility is sperm chromatin status. Under Assisted Reproductive Techniques (ART), especially Intracytoplasmic Sperm Injection (ICSI), the natural selection of high quality sperm with intact chromatin is not possible. Therefore, embryo quality and pregnancy rate decreased for damaged DNA of sperms involved in the fertilization of eggs. Thus, this study evaluated the frequency of abnormal sperm chromatin condensation and damaged sperm chromatin in men with different infertility factors (e.g. oligozoospermia, asthenozoospermia, teratozoospermia, oligasthenoteratozoospermia, and normozoospermia) and ICSI outcomes were examined. 195 patients were examined and the sperm chromatin status was evaluated using aniline blue and toluidine blue staining. Fertilization, zygote and embryo quality, chemical pregnancy and abortion rates were calculated, too. The results showed that in the oligoasthenoteratozzoospermia samples, the damaged chromatin percentage was higher than that in normozoospermia ones. The fertilization rate, embryo quality, and pregnancy rate significantly decreased in this group. Also, a higher abortion rate was observed in this group (P<0.05). In conclusion, the frequency of damaged chromatin was observed to be different in different male infertility factors, which could influence the ICSI outcomes. Therefore, the evaluation of sperm chromatin status before cycle initiation was found to promote ICSI outcomes.
Alireza Amini Hajiabadi, Asghar Mosleh Arani, Someh Ghasemi, Mohammad Hadi Rad, Shima Shabazi, Hassan Etesami,
Volume 8, Issue 2 (7-2021)
Abstract
Salinity stress is an important challenge for wheat production in the world. Plant growth promoting rhizosphere bacteria, isolated from halophytic plants, can increase the tolerance of crop plants to salinity by direct and indirect mechanisms. In this study, plant growth-promoting traits of bacterial strains (Bacillus safensis, Bacillus pumilus and Zhihengliuella halotolerans), isolated from the rhizosphere of several halophyte plants, were deterimined and their effects on some vegetative traits and ionic content of wheat plant irrigated with saline water ( 0.2, as control, 4, 8 and 16 dS/m) were measured. Result showed that all three bacteria were able to produce auxin, hydrogen cyanide, siderophore, 1-aminocyclopropane-1-carboxylic acid deaminase and soluble phosphate. The increase in salinity levels caused increase in the concentration of sodium and decrease in the concentration of potassium, calcium and phosphorus in wheat leaves, as well as decrease in stem length, shoot and root dry weight, root to shoot dry weight ratio and total biomass. In wheat plants irrigated with saline water and inoculated with the bacterial strains, sodium concentration decreased up to 17.7% and concentrations of potassium, calcium, phosphorus and potassium to sodium ratio increased up to 33, 25.7, 200.4 and 41%, respectively. The most efficient bacterium was found to be Z. halotolerans. All bacterial isolates also increased stem length, shoot and root dry weight, root to shoot dry weight ratio and total biomass by 17, 58.6, 137, 88 and 66 %, respectively. The results of this study showed that the plant growth-promoting bacteria of rangeland halophytic plants potentionally improve the growth indices of wheat plants in saline conditions. These results also showed that the rhizosphere of halophytic plants in rangelands can be a good source for the isolation of salinity-resistant bacteria to improve the resistance of wheat plants to salinity.
Fereshteh Heidargholinezhad, Yousef Hamidoghli, Valliollah Ghasemiomran, Pouria Biparva,
Volume 9, Issue 4 (12-2022)
Abstract
Centella asiatica, is well known to be a valuable medicinal plant for producing valuable compounds such as asiaticoside, asiatic acid, madcasoside and madcasic acid. The plant is believed to improve memory, lower blood pressure, be a strong antioxidant and anticancer. Therefore, it is important to optimize tissue culture methods in order to facilitate the extraction of medicinal compounds, gene transfer as well as improvement of medicinal properties of the plant. Calli prepared from various medicinal plants can be used to increase the amount of medicinal compounds in the cell suspension culture and gene transfer. The aim of this study was to investigate the effect of different concentrations of two hormones, BAP and NAA, on leaf explant for callus initiation, as one of the important sources of secondary metabolites production. For this purpose, leaf explants were treated with 6 different concentrations of BAP (0, 0.5, 1, 1.5, 2.5, 3.5 mg/L) and 5 different concentrations of NAA (0, 0.25, 0.5, 1, 2 mg/L). The results of this study showed that the best callus was obtained by the combination 1.5 mg/L of BAP and 0.5 mg/L of NAA, resulting in the leaf explants with callus induction of 100%, fresh weight of 1.457 gr and callus diameter of 1.459 cm. The results showed that two hormones of BAP and NAA have synergistic effects on the increase of the quality and quantity of the produced calli.
