Details

Autor(en) / Beteiligte

• Guterres, J.
• Rossato, L.
• Doley, D.
• Pudmenzky, A.

Titel

A new conceptual framework for plant responses to soil metals based on metal transporter kinetic parameters

Ist Teil von

• Journal of hazardous materials, 2019-02, Vol.364, p.449-467

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •A new conceptual framework for plant response to soil metals is proposed.•The framework is based on metal transporter kinetic parameters.•The validated framework applies to all plant parts and soil available metal levels.•A new terminology for metal tolerant plants is proposed based on the framework.•The framework may also apply to non-metal elements or ions. Based on a review of the literature, we have developed a functional conceptual framework of plant metal uptake in relation to plant available metal concentration in the soil. This framework applies to all plant parts and plant available metal levels in soils, and was validated using independent datasets from field surveys and the literature. This is the first framework based on metal transporter kinetic parameters and combining Michaelis-Menten (hyperbolic) kinetics facilitated by the High Affinity Transport System (HATS) for soil concentrations below the transition concentration between transport systems, and linear metal uptake facilitated by the Low Affinity Transport System (LATS) for higher soil available metal concentrations. We propose a new terminology for metal tolerant plants, i.e. metal tolerators, based on this framework. Depending on the plant available metal levels in the soil, tolerator responses to metals can be described best by either Vmax and Km for soil concentrations below the transition concentration between metal transport systems (HATS), or by the slope for greater soil concentrations (LATS). This conceptual framework may be a useful tool for selecting suitable metal tolerators for specific phytoremediation purposes, and may be also applied to non-metal elements or ions.