LEAD UPTAKE AND ACCUMULATION BY STRAWBERRY PLANTS
Since heavy metal accumulation in plants has been implicated as the cause of several health problems, reduction of plant uptake of these non-essential elements and reduction of heavy metal content in food crops is desirable. This investigation was undertaken to study lead (Pb) uptake by strawberry plants from soil polluted by lime contaminated with heavy metals. Three different kinds of industry waste lime containing from 12.4 to 1770 ppm Pb were used. The effect of soil applied Pb on soil Pb distribution, strawberry yield, fruit size and Pb concentration in strawberry roots, leaves and fruit in response to soil organic matter content and lime rates were investigated. Strawberry plants cv. Senga Sengana (Fragaria grandiflora Duch.) were grown for 4 years. Pb was applied at two lime rates prior to planting. Pb was mainly accumulated in the plough layer. Soil Pb content increased from 12.2 ppm (background levels) to a maximum of 40.0 ppm. Significant correlations between soil Pb and Pb concentration in strawberry roots and leaves were found. However, plant Pb uptake was influenced by changes of soil pH resulting from liming. The strawberry roots had the highest Pb concentration among all examined plant parts. Fruit analysis showed very low Pb concentration regardless of Pb content in the soil. Results of this study show that even high soil Pb level has no effect on strawberry fruit Pb concentration and plant Pb uptake can be reduced by an increase in soil pH.
Ciesli'nski, G. and Mercik, S. (1993). LEAD UPTAKE AND ACCUMULATION BY STRAWBERRY PLANTS. Acta Hortic. 348, 281-286