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INTRODUCTION About 8 thousand species of higher plants and 7–10 thousand species of fungi of the planet form mycorrhiza, which participates in the cycle of biogenic elements, activation of mineral nutrition

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-quality and some of the soil health parameters. Fungi coexist with the roots at most of the crops, monocots and dicotyledons, herbaceous plants, and some fruit trees such as citrus fruits and apples... etc. The most common form of mycorrhiza is the

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-tuning during arbuscular mycorrhiza development . Arch. Microbiol. 199 , 787 – 798 . 12. Fritz , M. , Jakobsen , I. , Langkjaer , M. F. , Thordal-Christensen , H. , Pons

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soil. Mycorrhiza 11:119–122. Alizadeh A. Occurrence of arbuscular mycorrhizal fungi in saline soils of the Tabriz Plain of Iran in relation to some physical and chemical

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Behl, R.K., Sharma, H., Kumar, V., Narula, N. 2003. Interactions amongst Mycorrhiza, Azotobacter chroococcum and root characteristics of wheat varieties. J. Agron. Crop Sci. 189 :151

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arbuscular mycorrhiza and phosphorus supply on polyamine content, growth and photosynthesis of Plantago lanceolata . Biologia Plantarum , 46 , 563–569. Lang F. Influence of

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The abundance and diversity of indigenous Trichoderma fungi were tested for correlations with the natural colonization of symbiotic arbuscular mycorrhizal fungi (AMF) in Cd-, Zn- and Ni-polluted soils. Infection frequency (F%) and arbusculum richness (a%) of the mycorrhiza fungi were estimated on red clover grown in a pot experiment set up with calcareous loamy chernozem soil contaminated with Cd, Ni and Zn salts (in 0, 30, 90 and 270 mg kg -1 dry soil concentration) in the field, eight years prior to the pot experiment. Correlation analyses were used to assess the effect of different heavy metal loads on the interrelations of these two types of beneficial fungi. When the test was performed for single variables, significant correlations could be found with very close (r > 0.96 at p < 0.05) results. The rate and direction (positive or negative) of correlations, however, varied with the type of heavy metals. With the combinations of some Trichoderma and mycorrhiza parameters a significant model was obtained for the infection frequency (R² = 0.9405 at p = 0.0062) and for arbusculum richness (R² = 0.997 at p = 0.0007), which suggests a significant complex influence between the symbiotic (AMF) and the free-living ( Trichoderma ) beneficial fungi. This interaction was altered by heavy metals. In the Ni treatments, the correlation data were always negative between the two groups of beneficial fungi.  

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a highly contaminated calcareous soil by arbuscular mycorrhizal maize. Mycorrhiza. 14. 347–354. Füzy, A. et al., 2008. Drought; but not salinity determines the apparent effectiveness of halophytes

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(Lib.) de Bary in the common bean ( Phaseolus vulgaris L.) . Plant Pathol. J. 8 , 74 – 78 . 2. Azcón-Aguilar , C. , Barea , J. M. ( 1996 ) Arbuscular mycorrhizas and

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425 Hayman, D. S. (1975): The occurrence of mycorrhiza in crops as affected by soil fertility. pp. 495–509. In: Sanders, F. E., Mosse, B., Tinker, P. B. (eds.), Endomycorrhizas

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