Cadmium and mineral nutrient accumulation in potato plantlets grown under cadmium stress in two different experimental culture conditions
In order to evaluate the effect of cadmium (Cd 2+) toxicity on mineral nutrient accumulation in potato ( Solanum tuberosum L.), two cultivars named Asterix and Macaca were cultivated both in vitro and in hydroponic experiments under increasing levels of Cd 2+ (0, 100, 200, 300, 400 and 500 μM in vit...
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Veröffentlicht in: | Plant physiology and biochemistry 2009-09, Vol.47 (9), p.814-821 |
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Sprache: | eng |
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Zusammenfassung: | In order to evaluate the effect of cadmium (Cd
2+) toxicity on mineral nutrient accumulation in potato (
Solanum tuberosum L.), two cultivars named Asterix and Macaca were cultivated both
in vitro and in hydroponic experiments under increasing levels of Cd
2+ (0, 100, 200, 300, 400 and 500 μM
in vitro and 0, 50, 100, 150 and 200 μM in hydroponic culture). At 22 and 7 days of exposure to Cd
2+, for the
in vitro and hydroponic experiment, respectively, the plantlets were separated into roots and shoot, which were analyzed for biomass as well as Cd
2+, and macro (Ca
2+, K
+ and Mg
2+) and micronutrient (Cu
2+, Fe
2+, Mn
2+ and Zn
2+) contents. In the hydroponic experiment, there was no reduction in shoot and root dry weight for any Cd
2+ level, regardless of the potato cultivar. In contrast, in the
in vitro experiment, there was an increase in biomass at low Cd
2+ levels, while higher Cd
2+ levels caused a decrease. In general, Cd
2+ decreased the macronutrient and micronutrient contents in the
in vitro cultured plantlets in both roots and shoot of cultivars. In contrast, the macronutrient and micronutrient contents in the hydroponically grown plantlets were generally not affected by Cd
2+. Our data suggest that the influence of Cd
2+ on nutrient content in potato was related to the level of Cd
2+ in the substrate, potato cultivar, plant organ, essential element, growth medium and exposure time. |
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ISSN: | 0981-9428 1873-2690 |
DOI: | 10.1016/j.plaphy.2009.04.002 |