Abstract：
: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 18d growth on 0.5mM 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.
journal_name
Chemospherejournal_title
Chemosphereauthors
Douchiche O,Soret-Morvan O,Chaïbi W,Morvan C,Paynel Fdoi
10.1016/j.chemosphere.2010.09.011subject
Has Abstractpub_date
2010-12-01 00:00:00pages
1430-6issue
11eissn
0045-6535issn
1879-1298pii
S0045-6535(10)01008-8journal_volume
81pub_type
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