In order to study potential antioxidant defense mechanisms, the effects of increasing concentrations of lead (Pb) on polyamines (PAs), various thiols, vitamins C and E, and proline contents in sterilized seedlings of Nymphoidespeltata (S.G. mel.) Kuntze were investigated after 5 days of exposure.
The protective effects of polyamines (PAs) against copper (Cu) toxicity were investigated in the leaves of Nymphoidespeltatum. Cu treatment increased the putrescine (Put) level and lowered spermidine (Spd) and spermine (Spm) levels, thereby reducing the (Spd+Spm)/Put ratio in leaves. Exogenous
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