Lead nitrate at concentration of 150 mg dm-3 inhibits root growth of Lupinus luteus seedlings by bout 20 %, which is accompanied by an increase of K+ leakage from the root cells. Non-denaturing isoelectric focusing in polyacrylamide slab gel has shown that lead stimulates the activity of most lipoxygenase isoenzymes and induces one additional isoenzyme with pI 6.9.
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Rucińska et al. (2005) studied this question.
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