Young tomato plants (Lycopersicon esculentum Hill.) 'Santa Cruz', lineages Kada and Samano, were cultivated in solutions with different calcium concentrations (0 ppm, 50 ppm, 100 ppm, 200 ppm and 400 ppm Ca) with the following purposes: (a) to correlate calcium supply and the nutrient concentrations in the tomato plant, and (b) to reveal nutritional differences between the lineages. Ninety days after started the different treatments, plant were collected and separated into old leaves, new leaves, lower part of the stem, superior part of the stem and fruits. The plant material was dried and analysed for micro-nutrients, excepting for chlorine and molybdenum. The main conclusions were as follows: - the concentration of calcium in the culture solutions increased the magnesium concentration in the leaves and in the superior part of the stem of the lineage Samano, while in the parts of lineage Kada a decrease of magnesium concentration was observed; - the concentration of the other micronutrients presented differences in the lineage and in the analysed parts.