For determination of cadmium content in roots and shoots of
wheat seedlings pretreated and untreated for a day with 50 M SA
and exposed to 1 mM cadmium acetate during 24 h,air-dry samples
of roots and shoots(1g) were ashed in a muffle furnace at 550 ◦C
for 20 h.The ash residue was incubated with 50 ml 0.1 M HNO3.
After filtering the extract,this was used for the analysis of
cadmium concentration.The levels of metal contents were determined
by Shimadzu AA-6300 atomic absorption spectrophotometry (Shi-
madzu Kyoto,Japan).Theamountofcadmiumisexpressedonthe
basis ofdryweight.