Fig. 6

Immunogold micrographs of transverse sections of celery collenchyma strands at different developmental stages labelled with monoclonal antibodies LM5 (a-h) and LM6 ( i-p). Stage 1 (2.6 cm long petiole) (a, b, I, j), Stage 2 (11 cm petiole) (c, d, k, l), Stage 3 (24 cm petiole) (e, f, m, n), Stage 4 (40 cm petiole) (g, h, o, p). Two different regions of cells were shown, cell corners (a, c, e, g, i, k, m, o) and thick walls (b, d, f, h, j, l, n, p) that connect two cells, is = intercellular space, mj = middle lamella junctions, ml = middle lamella, pm = plasma membrane. Scale = 500 nm