Effect of microbial siderophore DFO-B on Cd accumulation by Thlaspi caerulescens hyperaccumulator in the presence of zeolite

• Published in: Chemosphere (Oxford) 2012-07, Vol.88 (6), p.683-687
• Main Authors: Karimzadeh, Lotfollah, Heilmeier, Hermann, Merkel, Broder J.
• Format: Article
• Language: English
• Subjects: Applied sciences; Bioaccumulation; Biodegradation, Environmental - drug effects; Biological and medical sciences; Biological Transport - drug effects; Biotechnology; Cadmium; Cadmium - metabolism; Decontamination. Miscellaneous; Deferoxamine - pharmacology; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Environment and pollution; Environmental Pollutants - metabolism; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Hyperaccumulator; Industrial applications and implications. Economical aspects; Iron - metabolism; Metal uptake; Microbial siderophore DFO-B; Microorganisms; Miscellaneous; Plants (organisms); Pollution; Pollution, environment geology; Roots; Sand; Siderophores - pharmacology; Soil (material); Soil and sediments pollution; Thlaspi - drug effects; Thlaspi - metabolism; Zeolite; Zeolites; Zeolites - pharmacology
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2012.03.075

► Effect of zeolite on Cd uptake by Thlaspi caerulescens. ► Effect of D-FOB on Cd uptake by T. caerulescens. ► Bioaccumulation and translocation of Cd in T. caerulescens. ► Total metal accumulation in the shoots of plants affected by treatments. Hyperaccumulators are grown in contaminated soil and water in order that contaminants are taken up and accumulated. Transport of metals from soil to plant is initially dependent on the solubility and mobility of metals in soil solution which is controlled by soil and metal properties and plant physiology. Complexation with organic and inorganic ligands may increase mobility and availability of metals for plants. In this work the influence of desferrioxamine-B (DFO-B), which naturally is produced in the rhizosphere, and zeolite on Cd accumulation in root and shoot of Thlaspi caerulescens (Cd hyperaccumulator) was investigated. Plants were grown in pots with clean quartz sand, amended with 1% zeolite; treatment solutions included 0, 10, and 100μM Cd and 70μM DFO-B. Addition of zeolite to the quartz sand significantly reduced Cd concentration in plant tissues and translocation from root to shoot. On contrary, DFO-B considerably enhanced Cd sorption by roots and translocation to aerial part of plants. Treating the plants with zeolite and DFO-B together at 10μM Cd resulted in reduction of the bioaccumulation factor but enhancement of Cd translocation from root to shoot at the rate of 13%. In contrast, at 100μM Cd in the solution both bioaccumulation and translocation factors decreased. Total metal accumulation as a key factor for evaluating the efficiency of phytoremediation was highly influenced by treatments. Presence of zeolite in pots significantly decreased total Cd accumulation by plants, whereas, DFO-B clearly enhanced it.