Abstract
The influence of Cd on growth, Cd accumulation and glucosinolate (GS) contents was investigated in Thlaspi praecox in comparison to Thlaspi arvense. Accumulation of up to 2,700 μg Cd g-1 dry weight in shoots of T. praecox, growing in nutrient solution with 50 μM Cd without growth inhibition, confirmed this species as a Cd-hyperaccumulator. Cadmium increased the level of total GS in T. praecox without a statistically significant influence on total sulphur. This increase in GS was due to the enhancement of benzyl-GS, mainly sinalbin. In the Cd sensitive T. arvense Cd caused a shift from alkenyl-GS, mainly sinigrin, to indolyl-GS. The Cd-induced increase of total GS in T. praecox indicates that in this species Cd hyperaccumulation is not linked to trade-off of organic defences. The distinctive influence of Cd on GS profiles in Cd-sensitive T. arvense and Cd-tolerant T. praecox favouring indolyl-GS and benzyl-GS, respectively, is discussed in relation to jasmonate and salicylate as possible key molecules in Cd-stress transduction in these contrasting Thlaspi species.
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Abbreviations
- GS:
-
Glucosinolate
References
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Acknowledgements
Supported by the Spanish and Catalonian Governments (DGICYT, BFU 2004-02237-CO2-01 and Grup de Recerca 2005GR 0078). The grant by COST Action 859 to P. Pongrac for her research stay at the Autonomous University of Barcelona is gratefully acknowledged.
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Tolrà, R., Pongrac, P., Poschenrieder, C. et al. Distinctive effects of cadmium on glucosinolate profiles in Cd hyperaccumulator Thlaspi praecox and non-hyperaccumulator Thlaspi arvense . Plant Soil 288, 333–341 (2006). https://doi.org/10.1007/s11104-006-9124-1
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DOI: https://doi.org/10.1007/s11104-006-9124-1