Differential Transport of Boron in Tomato (Lycopersicon esculenlum Mill.)

Two tomato cultivars, T3238 (B‐inefficient) and Rutgers (B‐efficient), were grown in solution cultures with increasing concentrations of B. Rutgers was about 15 times more efficient than T3238 in utilizing the B in the growth medium. Rutgers translocated more B to top leaves than the inefficient T3238. When plants developed B‐deficiency symptoms, there was no evidence of B redistribution between tissues. Reciprocal grafts of T3238 and Rutgers demonstrate root control of B transport.