Calcium Accumulation in Potato Tubers: Role of the Basal Roots

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Abstract
Using a divided-pot system, the supplies of Ca to the tuber region and to the basal root region of potato plants (Solanum tuberosum L.) were controlled separately. Addition of Ca to the basal root region did not increase the Ca concentration in the tubers over that of the field-grown tubers. Addition of Ca to the stolon and tuber region, however, resulted in an over 3-fold increase in the Ca concentration of the tuber peel and medullary tissue. These results suggest that a) the main root system (basal roots) does not contribute to Ca accumulation in the potato tuber and b) tuber Ca content can be increased by placing Ca in the tuber and stolon area.

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