Systèmes Agraires et Environnement
Volume 1, Numéro 1, Pages 102-107
2017-10-14

Cadmium Accumulation In Atriplex Nummularia L. (old Man Saltbush) Grown On Contaminated Non Saline And Saline Environment



Authors : Badache Hakim . Sbartai H . Djebar M. R. . Manousaki E .

Abstract

In this study, the salt bush Atriplex nummularia L., which is a C4 perennial shrub with an excellent tolerance to drought and salinity, is investigated with the main aim to assess its phytoremediation potential for Cd removal from contaminated soils. In the present study, the halophyte used has the ability to excrete the excess NaCl under salt effect through salt glands and trichomes covering their leaf surface. Therefore, it may be suggested that Cd salts have been excreted through trichomes and salt glands to leaf surface then washed out mainly by dew. On the other hand, the halophytes Atriplex, plants used in the present study have salt glands. In this respect, many halophyte species are no more able to accumulate high amount of Na in trichomes covering the leaf surface but also other elements may accumulate when present in excess. Thus, halophytes are potentially ideal elements for phytoextraction or phytostabilization prone to be polluted by heavy metals contaminating soils and especially heavy metals affected by soil salinity.

Keywords

Cadmium; salt glands; phytoextraction; Atriplex nummularia; salinity.

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