Distinctive effects of cadmium on glucosinolate profiles in Cd hyperaccumulator Thlaspi praecox and non-hyperaccumulator Thlaspi arvense

Roser Tolrà, Paula Pongrac, Charlotte Poschenrieder, Katarina Vogel-Mikuš, Marjana Regvar, Juan Barceló

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58 Citations (Scopus)

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. © 2006 Springer Science+Business Media B.V.
Original languageEnglish
Pages (from-to)333-341
JournalPlant and Soil
Volume288
DOIs
Publication statusPublished - 1 Oct 2006

Keywords

  • Cadmium hyperaccumulation
  • Glucosinolate
  • Sinalbin
  • Thlaspi arvense
  • Thlaspi praecox

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