Ascorbic acid, thiamine or salicylic acid induced changes in some physiological parameters in wheat grown under copper stress
2011
Al-Hakimi, A.B.M.,Taiz University (Yemen). Biology Dept. | Hamada, A.M.,Assiut Univ. (Egypt). Botany Dept.
Five-day-old wheat seedlings were grown hydroponically in aerated Hoagland solution supplemented with different concentrations of Cu (0, 5, 10, 20 and 40 mg/L Cu2+) in order to investigate whether ascorbic acid, salicylic acid and thiamine confer protection against Cu toxicity. The fresh and dry weights of roots and shoots of wheat seedlings showed a marked decrease as Cu concentration increased. Concentrations of pectin, cellulose, soluble carbohydrates, and phospholipids in the roots and shoots of test plants were significantly lowered with the increase of Cu concentration. However, hemicellulose, lignin, total lipids, glycolipids, sterols and proline levels in roots and shoots increased under Cu stress. Cu treatment also induced the stimulation of soluble, total and cell wall associated proteins, other free amino acids and total carbohydrates in shoots and a slight reduction in roots. The adverse effects of Cu toxicity treatments on root and shoot growth were partially alleviated by the treatment of the plants with ascorbic acid, thiamine and salicylic acid.
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