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Strategies of cadmium and zinc resistance in willow by regulation of net accumulation

Landberg, T.,Stockholm Univ. (Sweden). Dept. of Botany ; Jensen, P.,Swedish Univ. of Agricultural Sciences, Alnarp (Sweden) ; Greger, M.,Stockholm Univ. (Sweden). Dept. of Botany

Biologia plantarum, 2011, Vol.55 (1), p.133-140 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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Título:
Strategies of cadmium and zinc resistance in willow by regulation of net accumulation
Autor: Landberg, T.,Stockholm Univ. (Sweden). Dept. of Botany ; Jensen, P.,Swedish Univ. of Agricultural Sciences, Alnarp (Sweden) ; Greger, M.,Stockholm Univ. (Sweden). Dept. of Botany
Assuntos: Biomedical and Life Sciences ; BROTES ; CADMIO ; CADMIUM ; CAPACIDAD DE CAMBIO IONICO ; CAPACITE D'ECHANGE IONIQUE ; CATION ; cation exchange capacity ; CATIONES ; CATIONS ; CELL MEMBRANES ; cell wall ; CINC ; CONTAMINANTES ; efflux ; Environmental Sciences related to Agriculture and Land-use ; FISIOLOGIA VEGETAL ; Förnyelsebar bioenergi ; HEAVY METALS ; http://www.fao.org/aos/agrovoc#c_1178 ; http://www.fao.org/aos/agrovoc#c_14261 ; http://www.fao.org/aos/agrovoc#c_16169 ; http://www.fao.org/aos/agrovoc#c_2223 ; http://www.fao.org/aos/agrovoc#c_24371 ; http://www.fao.org/aos/agrovoc#c_24864 ; http://www.fao.org/aos/agrovoc#c_25189 ; http://www.fao.org/aos/agrovoc#c_6076 ; http://www.fao.org/aos/agrovoc#c_6077 ; http://www.fao.org/aos/agrovoc#c_6520 ; http://www.fao.org/aos/agrovoc#c_6651 ; http://www.fao.org/aos/agrovoc#c_8517 ; http://www.fao.org/aos/agrovoc#c_9693 ; influx ; ION EXCHANGE CAPACITY ; Life Sciences ; MEMBRANAS CELULARES ; MEMBRANE CELLULAIRE ; METAL LOURD ; METALES PESADOS ; Miljö- och naturvårdsvetenskap ; PHYSIOLOGIE VEGETALE ; PLANT PHYSIOLOGY ; Plant Sciences ; POLLUANT ; POLLUTANTS ; POLLUTION ; POLUCION ; POUSSE ; RACINE ; RAICES ; Renewable Bioenergy Research ; RESISTANCE AUX FACTEURS NUISIBLES ; RESISTANCE TO INJURIOUS FACTORS ; RESISTENCIA A AGENTES DANINOS ; ROOTS ; Salix heavy metals uptake exudation ; SALIX VIMINALIS ; SHOOTS ; tolerance ; växtfysiologi ; ZINC
É parte de: Biologia plantarum, 2011, Vol.55 (1), p.133-140
Notas: F60
H50
T01
http://wwwueb.asuch.cas.cz/bp/bp.htm
2011000501
Descrição: This work was performed to find out if metal resistant clones of Salix viminalis are capable to achieve high resistance to the metals by regulating their net accumulation. Salix clones with low or high resistance in combination with low or high accumulation capacity of either Zn or Cd were cultivated from cuttings in nutrient solution. The investigation included leakage and uptake experiments using 65Zn or 109Cd and analysis of root cation exchange capacity (CEC). Some plants were pre-treated with unlabeled 0.5 microM Cd or 2.5 microM Zn 24 h prior to the experiments to induce possible tolerance mechanisms. To find out if the regulation was a metabolic process, experiments were also performed with 2,4-dinitrophenol (DNP). Clones with high resistance and low Cd accumulation had higher efflux of Cd compared to the other clones, in both untreated and Cd pre-treated plants. This indicates a constitutive property to lower Cd accumulation by high Cd leakage. Pre-treatment with 0.5 microM Cd diminished the Cd net uptake to a level near zero in all clones, likely to be due to decreased the Cd uptake. In contrast, resistant clones with high Cd accumulation had the highest root CEC, which may be used to bind up Cd in the free space. No clear regulation of Zn net uptake was found in Zn-resistant clones. Pre-treatment with Zn decreased the uptake of Zn into the free space in Zn-resistant clones. The resistant high-accumulating clones, however, showed the highest leakage of Zn in both untreated and pre-treated plants, a constitutive process not related to high accumulation. Neither the influx nor the efflux of Cd or Zn was affected by DNP indicating passive transport across the plasma membrane.
Editor: Dordrecht: Springer Netherlands
Idioma: Inglês

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Strategies of cadmium and zinc resistance in willow by regulation of net accumulation

Landberg, T.,Stockholm Univ. (Sweden). Dept. of Botany ; Jensen, P.,Swedish Univ. of Agricultural Sciences, Alnarp (Sweden) ; Greger, M.,Stockholm Univ. (Sweden). Dept. of Botany

Dordrecht: Springer Netherlands

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