Fig. 5

Light microscopy analysis of tomato sepals from wild type (a, c) and transgenic (b, d, e, f) plants. A leaf-like structure with a spongy mesophyll is visible in the wild type sepals accompanying both mature green (a) and red (c) fruits while in all the transgenic sepals (b, d, e, f) the internal structure appears rather compact. The thickness of the transgenic sepals show an increase in parallel with the passage from the mature green (b) to breaker (d) and red (e, f) stage of development of the fruits to which they are attached. A detail of a yellowish sepal (f) accompanying a red fruit shows that the small sized cells situated underneath the abaxial epidermis have a multilayered organization (scale bar = 100 μm)