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Journal of Biological Sciences
Year: 2007  |  Volume: 7  |  Issue: 6  |  Page No.: 1001 - 1004

Anatomical and Morphological Changes Caused by Interaction Between UV-C Radiation and Colonized Wheat by Some Species of Arbuscular Mycorrhizas

Samaneh Rahmatzadeh and Jalil Khara    

Abstract: Among the harmful components of sunlight is ultraviolet radiation of wavelengths 220-380 nm. UV-C (220-280 nm) is one of the three UV spectra that is filtering out in the atmosphere, but it can cause oxidative and morphological changes in the some conditions. Vesicular arbuscular mycorrhiza can resist many plants against stress conditions. Wheat (Triticum aestivum L. cv. Azar2) plants colonized by three species of mycorrhizae namely Glomus etunicatum, Glomus intraradices and Glomus veruciforme were used in this study. They have been exposed to UV-C (245 nm) light for 7 h. We measured dry and fresh weight of shoot and root systems and length of the longest roots and leaves. Also, we measured percentage of root length colonization. Furthermore, number of mesophyll cells in each treatment is determined by staining the leaf cross sections. Mycorrhizal treated plants showed increased root length colonization in comparition to non-mycorrhizal treatment. However, no significant difference was observed in the leaves length all of the treatments. Also, fresh and dry weight was increased in UV treated mycorrhizal plants in comparition to non-inoculated ones. Infection percentages and number of mesophyll cells had not significant difference between mycorrhizal and non-mycorrhizal plants.

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