Fig. 6.

Distribution of potassium in leaves of Vriesea splenriet after 250 d of growth with and without potassium. Plants, which had been fertilized before the experiment, were grown under otherwise identical conditions in the greenhouse. Leaves are numbered according to their age. A1 was the oldest adult and A12 the youngest fully developed leaf. G13–G16 are still growing leaves. Data are means ± s.d.; n = 4.