PJB-2019-581
EFFECT OF POTASSIUM IN ALLEVIATING COPPER STRESS IN ZEA MAYS L.
Zainab Waheed
Abstract
Potassium is required by Corn for growth processes, and it is known to create immunity and tolerance in plants against various stresses. The problem of copper pollution is increasing throughout the world due to various anthropogenic activities. Therefore this experiment was designed to study the effects of potassium in alleviating adverse effects of copper in maize by estimating the changes in yield, physiological and biochemical parameters at reproductive stage of the crop. For this purpose a pot experiment was conducted. Copper levels (50&100 mg/kg) and potassium levels (50, 60 & 70 kg/ha) were used. The experimental units were organized in Randomized Complete Block Design (RBCD). Both the concentrations of copper were responsible for significant decline in biochemical and physiological and yield parameters but enhanced leaf proline and sugar contents. Potassium nutrition of (60 and 70 kg/ha) significantly enhanced these traits but decreased proline content and sugar content at reproductive stage. So it can be concluded that potassium has the stress alleviating potential under copper stress.
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