Plant biochemical responses to imbalance of zinc in substrate
2006
Osvalde, A., University of Latvia, Salaspils (Latvia). Inst. of Biology | Paegle, G., University of Latvia, Salaspils (Latvia). Inst. of Biology
The role of soluble pectins, free organic acids and proline in the regulation of the accumulation of Zn ions was studied in lettuce and radish under different levels of Zn concentrations (from deficiency to toxicity) in the growing medium. The results obtained suggest that the level of soluble pectins, total content of water extractable organic acids as well as free proline in plants are closely related with disturbances of plant mineral nutrition. Plant exposure to Zn deficiency resulted in considerably decreased accumulation of free organic acids as well as soluble pectins in leaves while Zn toxicity significantly induced increased accumulation of organic acids and decreased pectin contents in whole plants of lettuce and radish. The changes in accumulation of all the tree investigated biochemical compounds as a possible protective plant response to Zn imbalance have been discussed.
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