Document Type : Research Paper
Authors
1
Microbiology graduated student, Islamic Azad University, Karaj Branch, College of Science, Microbiology Department, Iran
2
Assistant Professor, Scientific Staff of Soil Biology Department, Soil and Water Research Institute, Iran
3
Professor, Scientific Staff of Islamic Azad University, Karaj Branch
Abstract
Biofertilizers not only have positive effects on soil sustainable fertility, but also beneficial economic and environmental attributes. Therefore, they can be used as a suitable substitute to replace all, or at least some of, the chemical fertilizers. Arbuscular mycorrhizal fungi are one of the most important kinds of biofertilizers. Considering the wide use of Carboxin thiram to control fungus pathogens in wheat cultivation in Iran, this project was designed and performed to define the effects of this fungicide on the symbiosis establishment between wheat and different species of arbuscular mycorrhizal fungi. In a greenhouse test, the effect of Carboxin thiram was studied at two rates of zero and 2gr/1000 gr on symbiosis of 6 mycorrhizal fungal species (Glomus clarum, Glomus caledonium, Glomus mosseae, Glomus sp, Glomus geosporum, Glomus versiforme), wheat (cv.Chamran ) growth indexes, spore population, and root colonization percentage. Results showed that seed treatment with Carboxin thiram had no significant effect on yield components of wheat (cv.Chamran). Inoculation with the mycorrhizal fungi and using Carboxin thiram significantly increased spore population (p<0.01) and root colonization (p<0.05). Maximum and minimum spore population in symbiosis produced by G.geosporum and G.clarum fungi in Carboxin thiram treatment were 34.37 and 5 spores per gram of soil, respectively. Finally, we concluded that using wheat seeds of cv. Chamran treated with Carboxin thiram had no negative effects on mycorhizal symbiosis of wheat with the studied fungi.
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