Abstract
Tomato plants (TVR-2), collected at the beginning of fruit harvest period, were separated into root, stem, petiole, lamina, fruit petiole, and fruit. These organs, except root, were further fractionated on the basis of node orders. Each fraction was subjected to chemical analysis with regard to 15 main nutrient elements. The amounts of uptake for major essential elements were proportional to their standard concentration in culture solution. No such relationship was found for minor essential elements. Elements such as N, Ca, S, B, Zn, and Cu are the highest in concentration at lamina ; elements such as NO_3-N, P, K, Mg, Sr, and Cl, at petiole ; elements such as Fe, Mn, and Na, at root ; and an element C, at fruit. It is notable that NO_3-N and Mg concentrations at petiole were much higher than those at lamina. The concentrations of NO_3-N, P, S, Mg, Mn, Zn, and Cu at the lower part of leaves (lamina and/or petiole) were much higher than those at the upper part of leaves. These elements may be excessively absorbed and accumulated at the lower part of leaves.
