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International Journal of Botany
Year: 2008  |  Volume: 4  |  Issue: 3  |  Page No.: 340 - 343

X-Ray Microanalysis and Ultrastructural Localization of Chromium in Raphanus sativus L.

Mehrdad Lahouti, Samaneh Jamshidi, Hamid Ejtehadi, Mina Rowshani and Homa Mahmoodzadeh    

Abstract: Ultrastructural studies of root cortical cells of Raphanus sativus L. seedlings experimentally exposed to 0-7 mg L1 Cr3+ revealed small electron dense granules especially in preplasmic zone. Root cortical cells of control seedlings grown in the absence of Cr3+ additions were void of any granules. X-ray microanalysis of the granules provided evidence that Cr was the predominant element while lower amounts of Fe, Zn and Mn were also measured in the granules. Presence of chromium deposit inclusions in the cells may be regarded as plant detoxifying mechanism to maintain relatively low cytoplasmic concentration of the element.

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