کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4410992 1307572 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characteristics of cadmium tolerance in ‘Hermes’ flax seedlings: Contribution of cell walls
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Characteristics of cadmium tolerance in ‘Hermes’ flax seedlings: Contribution of cell walls
چکیده انگلیسی

Most flax (Linum usitatissimum) varieties are described as tolerant to high concentrations of Cd. The aim of the present paper was to better characterize this tolerance, by studying the responses of flax plantlets, cv Hermes, to 18 d growth on 0.5 mM Cd. In Cd-treated seedlings, the majority of Cd was compartmentalized in the roots. Analysis of other elements showed that only Fe concentration was reduced, while Mn increased. Growth parameters of Cd treated flax were only moderately altered, with similar mass tolerance-indices for roots and shoots. Tissue anatomy was unaffected by treatment. The effect on lipid peroxidation, protein carbonylation and antioxidative activities appeared low but slightly higher in roots. The most important impacts of Cd were, in all organs, cell expansion, cell-wall thickening, pectin cross-linking and increase of cell-wall enzymatic activities (pectin methylesterase and peroxidase). Thus, the role of the cell wall in Cd tolerance might be important at two levels: (i) in the reinforcement of the tissue cohesion and (ii) in the sequestration of Cd.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 81, Issue 11, December 2010, Pages 1430–1436
نویسندگان
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