جستجوی مقالات مرتبط با کلیدواژه « Mycorrhizal symbiosis » در نشریات گروه « آب و خاک »

The present study investigated the effect of the combination of zeolite, mycorrhizal inoculation, and phosphorus fertilizer on mung bean production in the year 2022-2023 in the climatic conditions of Isfahan City. The experiment was performed as a split-split plot as a basic randomized complete block design with three replications. The main factor included zeolite at three levels (zero, 3, and 6 ton/h), and the secondary factors included mycorrhizal inoculation (inoculation and non-inoculation) and phosphorus fertilizer at three levels (zero, 75 and 150 kg/h). The results showed that the main effects of mycorrhizal inoculation and phosphorus fertilizer application on all measured traits were significant. The interaction effect of zeolite and phosphorus fertilizer showed that the highest seed yield was observed in the treatment of six ton/h of zeolite and not use or using 75 kg/h of phosphorus fertilizer at the rate of 2920.6 and 2895.67 kg/h, respectively, and the lowest in the absence of zeolite. The zeolite and phosphorus fertilizer consumption was obtained at the rate of 2063.36 kg/h. The results showed that the highest biological yield was observed in the treatment of six ton/h of zeolite and mycorrhiza + 75 kg/h of phosphorus fertilizer at the rate of 8127 kg/h, and the lowest in the case of no zeolite consumption, no mycorrhiza use and no use of phosphorus fertilizer. A total of 3893 kg/h was obtained. In general, combining or using zeolite, mycorrhizal, and phosphorus fertilizers in mung bean cultivation has led to improved growth, increased production, and improved product quality.

Since the long-term sustainability of garden ecosystems is dependent on maintaining the soil quality, knowing the condition of the soils and investigating the effects of the activities on the soil properties is very important and effective in ecosystem management. To investigate the soil quality index of almond (Prunus dulcis) orchards under different managed methods in ChaharMahal va Bakhtiari province, soil samples were collected from three points in each orchard and finally classified into 6 groups (Saman, Ben, Shahrekord, Kiar, Ardel, and Farsan). To determine the soil quality index, soil characteristics including pH, EC, total and water-soluble organic carbon, basal and substrate-derived respiration, rhizosphere microbial population, and available soil P and K were analyzed. The results showed that almond orchard management in different regions affected the soil characteristics and the processes evaluated in this study. The monitoring of soil properties showed that pH 7.05 - 8.48, EC 0.23 - 2.91 dS/m, microbial respiration 0.44 - 8.57 mg CO2.100 g-1.day-1, organic carbon 2.09 - 44.79 g/kg, available phosphorus 1.5 - 122.3 mg/kg, and available potassium were between 91.2 - 3038 mg/kg. Soil quality index components including chemical components, microbial activity, microbial population, and soil organic carbon were determined. The contribution of soil salinity to soil quality obtained using factorial analysis was the highest (31%), followed by microbial carbon mineralization coefficient (27%), rhizosphere microbial population (24%), and water-soluble organic carbon (18%). The soil quality index values for Saman, Ben, Shahrekord, Kiar, Ardal, and Farsan almond orchards were 0.46, 0.40, 0.51, 0.67, 0.54, and 0.37, respectively. These values showed that the evaluated soils are suitable for almond production in Shahrekord, Kiar, and Ardal, and for Saman, Ben, and Farsan, there is a need for serious management measures to improve soil quality and increase the sustainability of these agricultural ecosystems.

Saline soils resulting from natural and/or anthropogenic processes are very diverse and widely distributed under all climates. Soil salinity as a serious environmental problem has negative effects on plant growth and development in arid and semi-arid as well as humid regions. Since increasing global food security is a fundamental goal to feed the growing world population, it is necessary to develop suitable and efficient techniques for the rehabilitation of salt-affected soils and their exploitation. Chemical fertilizers are usually used to provide nutrients required for plant growth in order to increase crop yield, but application of these chemical components has negative environmental effects and reduces the quality of soils and agricultural products. The use of beneficial microorganisms (bacteria and fungi) as fertilizers and biological amendments has a high potential to improve productivity in saline soils. The aim of this study was to investigate the effect of using Acidithiobacillus bacteria along with mycorrhiza on the production of some photosynthetic and biochemical metabolites in maize under salt stress and comparing it with control conditions.

To perform this experiment, a surface soil sample was collected from a depth of 30 cm from the campus of Ferdowsi University of Mashhad, and some physical and chemical properties of the soil were measured by usual laboratory methods. To prepare saline soil a mixture of four compounds MgSO4.7H2O, Na2SO4, NaCl, and CaCl2. 2H2O were used. The mycorrhizal fungus (Funneliformis mosseae) and mesophilic Acidithiobacillus bacteria species two types of bacteria, Acidithiobacillus thiooxidans PTCC No: 1692 (DSM 504) and Acidithiobacillus ferrooxidans PTCC No: 1646 (DSM 583), were purchased from Turan Biotechnology Company (Semnan Science and Technology Park) and Iran Microbial Scientific and Industrial Research Center (PTCC), respectively. In this research, the effect of biological treatments including: two levels of mycorrhiza (inoculation and non-inoculation), two levels of salinity (0.96 and 6 d/m) and four levels of Acidithiobacillus control (C), Acidithiobacillus thiooxidans (T), Acidithiobacillus Ferrooxidans (F), Acidithiobacillus thiooxidans and Ferrooxidans (T+F) were compared with each other on some photosynthetic and biochemical characteristics of Zea mays under greenhouse conditions in the form of a completely randomized design with factorial arrangement with three replications. 10 gr of salt mixture (this amount of salt was obtained to reach electrical conductivity of 6 in the pre-experiment) was added to 5 kg of soil and the soil moisture of the pots was kept for one month in the field capacity. Bacterial treatments were inoculated with 30 mL of cell suspension per pot (approximately 107 CFU mL-1). In the simultaneous use of two bacteria, 15 ml of each bacterial cell suspension (15+15) was added to each pot. Single-cross 704 variety of maize was grown in pots and soil moisture was maintained during the growth period in the field capacity by weighing. Chlorophyll a, b and carotenoid, concentrations of flavonoids, anthocyanins and proline and electrical leakage were measured in fresh leaf samples (third leaf on the stem).

The results showed that salinity decreased the percentage of root colonization and chlorophyll a and b content in leaves. Salinity decreased chlorophyll a, b and carotenoid in leaves by 27.9, 68.42% and 50%, respectively. Salinity increased proline concentration (42.62%), electrolyte leakage (33.30%), anthocyanins concentration (96.36%) and leaf flavonoids (84.73%) compared to control soil. Inoculation with mycorrhiza compared to no inoculation had a remarkable and significant effect on all investigated parameters in both saline and control soils. In saline soil, mycorrhizal inoculation reduces electrolyte leakage (56.75%) and increases chlorophyll a (2.3 times), chlorophyll b (6.6 times), carotenoid (1.3 times), proline concentration (24.39%), anthocyanins amount (24.07) and flavonoids (20.4%) in the plant. The effect of bacterial treatments on the investigated parameters in plants inoculated with mycorrhiza was greater than non-inoculated treatments. The effectiveness of the simultaneous application of both bacteria was greater than the effect of each of them alone. In saline soil, simultaneous inoculation of mycorrhizae with both bacteria species reduces electrolyte leakage (14.72%) and increases chlorophyll a (39.80%), chlorophyll b (106%), carotenoid (50%), proline concentration (10.12%), the amount of anthocyanins (14.17%) and flavonoids (4.06%) compared to mycorrhiza treatment alone. The results showed that these bacteria can probably be considered as helping mycorrhizal bacteria.

The objective of this study was to examine the impact of simultaneous inoculation of mycorrhizae and Acidithiobacillus bacteria on select photosynthetic and biochemical metabolites of maize subjected to salinity stress conditions. Confirming the results of other studies, the results of this research also showed the clear and distinct effect of mycorrhiza on increasing chlorophyll and producing metabolites effective in increasing plant resistance to salt stress. In addition, the results showed that although the use of each species of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans alone was effective on the measured parameters in both saline and control soils, the simultaneous inoculation of both Acidithiobacillus bacteria species and mycorrhiza had the greatest effect on increasing chlorophyll, production of proline, anthocyanins and flavinoids and reducing electrolyte leakage and as a result, increasing tolerance to salt stress. In other words, these bacteria can be considered as mycorrhiza helper bacteria, whose activity can improve the function of mycorrhiza. On the other hand, mycorrhiza symbiosis may have increased the efficiency of these bacteria by changing the soil conditions and the environment around the roots. However, further greenhouse and field experiments with other plant species are necessary to confirm these findings.

Today, fungicides are widely used to prevent or eradicate a variety of pathogenic fungi, but in some cases their use has destructive effects on beneficial microorganisms such as mycorrhizal fungi. Mycorrhizal fungi are among the beneficial microorganisms used in the production of biofertilizers. After mycorrhizal symbiosis, plant features included water and nutrient uptake as well as plant resistance to biotic and abiotic stresses improve. These microorganisms are also used to control soil pathogens. The present study was conducted to investigate the effect of concomitant use of fungicides including benomyl, roralthias, mancozeb and Tilt on the effectiveness of R irregularis in both wheat and corn plants under greenhouse conditions. The experiments were designed as a completely randomized design with five treatments and four replications. The effect of fungicides on the growth characteristics of wheat (Chamran cultivar) and corn (Zeamays, Single Cross 704) and their symbiosis relationship with R. irregularis were investigated. The results showed that the effectiveness of mycorrhizal fungus application was not affected by the concomitant use of fungicides. The application of fungicides also improved some growth characteristics in wheat and corn, although in most cases the differences with the control treatment were not significant. In general, two milliliters per liter of Tilt for wheat and two grams per liter of benomyl for corn can be recommended when using R. irregularis inoculum at the same time

Symbiotic fungies such as mycorrhiza can alleviate biotic and abiotic stresses in host plants and affect their growth, nutrition and tolerance to salinity stress. Glycyrrhiza glabra is commonly grown in Asia for medicinal purpose and fodder source for livestock. In order to assess the effect of entophytic fungi symbiosis on growth and some physiological properties of G. glabra under different levels of salinity, an experiment was conducted in a factorial design with combination of two factors, salinity levels (non-saline, 4, 8, 12 and 16 dS m-1) and symbiotic fungi (non-inoculated, inoculated with Piriformospora indica orRhizophagus intraradices) in three replicates. Results showed the decrease of root fungal colonization, shoot and root dry weight and root length, and shoot K and P content with increasing of salinity levels. Phosphorus and K utilization efficiency were decreased by increasing of salinity levels. Moreover, salinity caused a significant increase in electrolyte leakage and Na+/K+ ratio. R. intraradices colonization considerably increased tolerance index under salinity stress and decreased Na+/K+ ratio. R. intraradices inoculated plants showed greater biomass, P and K content in comparison with non-inoculated and P. indica inoculated plants. While plant inoculating with P. indica resulted in an increase in shoot dry weight at non-saline condition, and did not significantly affect other studied parameters. Results of this study indicated the ameliorating effects of arbuscular mycorrhizal symbiosis in G.glabra under salinity stress, and the utilization ability of this symbiosis in phytoremediation of salt affected soils.

This study was conducted to evaluate the effect of earthworms (Eisenia fetida) and arbuscular mycorrhiza fungi (F. mosseae) as well as their interactions on the root colonization, soil pH and soil dissolved organic carbon and nutrient concentration of iron, zinc, copper and manganese in maize. Experimental treatments included control, earthworm, mycorrhiza and earthworm + mycorrhiza was conducted in a completely randomized design in research greenhouse of Ferdowsi University of Mashhad with three replications. The results showed that the presence of earthworms in mycorrhiza + earthworm treatment had no significant effect on mycorrhizal root colonization compared with mycorrhiza treatment. The experimental treatments significantly reduced soil pH compared to the control treatment. Although experimental treatments significantly increased shoot dry weight, dissolved organic carbon and availability of iron, copper, zinc and manganese in the soil compared to control, however, it had a different effect on nutrient uptake by the plant. The highest concentration of Zn and Mn in shoot was obtained in mycorrhiza treatment that was statistically significant compared to other treatments (p

In order to evaluate the effect of mycorrhizal fungi, different sources and levels of iron on growth and nutrients uptake in Mexican lime (Citrus aurantifolia L) (one of the important rootstock in citrus growing regions in south of Iran), greenhouse experiments were conducted with factorial arrangement in a completely randomized design with three factors and four replications. Treatments consisted of three levels of mycorhizal fungus (without fungal inoculation, inoculation with Rhizophagus intraradices, inoculation with Glomus versiforme), two sources of iron (iron chelate, iron solphate), and three iron levels (0, 7.5, 15 mgkg-1 Fe). The results indicated that co-application of mycorrhizal fungal species and iron sources improved plant growth charactrices and the concentration of nitrogen, potassium, iron, zinc, copper, and manganese. In the treatments inoculated with mycorrhizal fungi, with an increase in iron levels, the nutrient concentrations of iron, zinc, copper and manganese in soil were increased, likely because of the balancing effect of mycorrhizal symbiosis on nutrient concentrations in plants. It seemed that co-application treatments of fungi with iron sulphate were effective on different growth indices of plant and could reduce iron chelate consumption or be used instead of it.

In order to the evaluation of the effect of mycorrhizal fungi, different sources and levels of iron on growth and nutrients uptake in Mexican lime (Citrus aurantifolia L) (one of the important rootstock in citrus growing regions in south of Iran), a greenhouse experiments were conducted with factorial arrangement in a completely randomized design with three factors and four replications. Treatments consisted of three levels of mycorhizal fungus (without fungal inoculation, inoculation with Rhizophagus intraradices, inoculation with Glomus versiforme), two sources of iron (iron chelate, iron solphate), and three iron levels (0, 7.5, 15 mgkg-1 Fe). The results indicated that co-application of mycorrhizal fungal species and iron sources was improved plant growth charactrices and the concentration of nitrogen, potassium, iron, zinc, copper, and manganese. In the treatments inoculated with mycorrhizal fungi, with an increase in iron levels, the nutrient concentrations of iron, zinc, copper and manganese in soil were increased, likely because of the balancing effect of mycorrhizal symbiosis on nutrient concentrations in plants. It seemed that co-application treatments of fungi with iron sulphate were effective on different growth indices of plant and could reduce iron chelate consumption or be used instead of it.

One of the method to clean up contaminated soil is growing a hyper accumulator plant which is named phytoremediation. Some of hyper accumulator plants are proper host for mycorrhizal fungi.In this relationship, fungus, consume a part of organic carbon from the plant and by developing its mycelium network help plant to uptake more mineral nutrients from the soil. By doing a greenhouse research tried to determine the mycorrhizal efficiency to increase plant ability in mineral nutrient and heavy metal uptake from a contaminated soil with a high level of Cr, Ni and Cd .In this exam two hyper accumulator plants , sunflower and corn and also 4 species of mycorrhizal fungi, including, Glomus mosseae , Glomus intraradices ,Glomus etunicatum and Glomus sp and one treatment without fungi as blank, with 5 replications per treatment were used. Results showed that mycorrhizal inoculation in two plants , sunflower and corn by increasing mycorrhizal colonization enhanced aerial part growth of plant and also macro and micro nutrient uptake. T4 treatment, including G.mosseae and G.intraradices in corn growth had the highest capacity for Cd, Ni and Cr uptake from the soil, so that it increased the uptake of these three elements in corn stalks react, 1.57, 3.79 and 4.18 micrograms per pot. In sunflower this treatment was able to increase Cd and Ni uptake, react 0.21 and 0.23 micrograms per pot. Finally if we want to use these two plants for phytoremediation, the use of these two fungi will be proposed.

Mycorrhizal status of pistachio seedling in Kerman province in regard to region and some soil properties and also symbiotic potential of Sorghum, clover and onion isolates with pistachio seedling were evaluated in this research. 72 samples of pistachio nurseries and 67 samples of Sorghum, clover and onion farms were gathered from Kerman province and mycorrhizal colonization percent of their roots were determined after clearing with KOH and staining with Tryphan blue. All soil samples were analyzed for EC and pH and then for soil texture of samples with different colonization percent. The result showed that all of samples had mycorrhizal symbiosis and the colonization percent was varied from minimum 33 to maximum 97 percent. The colonization percent of Kerman, Mahan and Bardsir samples was related mainly to 75-100% range, but 25-50% for Zarand samples. Based on regression test, there was a significant relation between soil texture and pH (α=5%) and also EC (α=5%) with colonization percent. The colonization percent were decreased significantly in soil salinity more than 4 dS/m. Inoculation of pistachio seedling with 20 mycorrhizal isolates of pistachio, sorghum, onion and clover plants via a greenhouse experiment showed that all isolates had colonization potential of pistachio roots after 60 days and colonization percent was varied from minimum 63 to maximum 88 percent. Inoculation of Pistachio seedlings with selected isolates had significant effect on most vegetative index of seedlings in compare to control treatment.