expression in 5 DAG seedlings. (A-H) Preferential expression of genes in leaf sheaths from Lines 3A-60813 (a and b), 3A-51694 (c and d), 4A-02639 (e and f), and 4A-01614 (g and h). (a, c, e, and g) Seedlings were grown under N-sufficient conditions (left) or N-deficient conditions (right). (b, d, f, and h) Cross section of leaf sheath under N-starvation. (i and j) Preferential expression in vascular cylinders of roots from Line 1B-11001. (i) N-sufficient conditions. (j) N-deficient conditions. Bar = 200 μm.