TY - JOUR
T1 - Distinctive effects of cadmium on glucosinolate profiles in Cd hyperaccumulator Thlaspi praecox and non-hyperaccumulator Thlaspi arvense
AU - Tolrà, Roser
AU - Pongrac, Paula
AU - Poschenrieder, Charlotte
AU - Vogel-Mikuš, Katarina
AU - Regvar, Marjana
AU - Barceló, Juan
PY - 2006/10/1
Y1 - 2006/10/1
N2 - 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.
AB - 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.
KW - Cadmium hyperaccumulation
KW - Glucosinolate
KW - Sinalbin
KW - Thlaspi arvense
KW - Thlaspi praecox
U2 - 10.1007/s11104-006-9124-1
DO - 10.1007/s11104-006-9124-1
M3 - Article
SN - 0032-079X
VL - 288
SP - 333
EP - 341
JO - Plant and Soil
JF - Plant and Soil
ER -