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Fig. 6 | BMC Plant Biology

Fig. 6

From: Phenotypic and genetic characterization of tomato mutants provides new insights into leaf development and its relationship to agronomic traits

Fig. 6

Characterization of corkscrew (crs), a tomato mutant with helical growth. a Slight curvature in the cotyledons and first leaves in crs seedlings cultivated in vitro. b Helical growth is accentuated in the epicotyl of crs young plants cultivated in the greenhouse. c-d In crs adult leaves the leaflet blade is curved (c) and the helical development is still more evident in the rachis (d). e crs adult plant showing helical growth in the stem as well as in the rest of vegetative organs. f Helical growth in the three external floral whorls. Note that the anther cone seems normal in its basal part but has a marked helical development at its terminal end. In addition, the sepals and petals curve slightly along their entire surface, except in the terminal part that curves fully towards the abaxial side of the respective floral whorls. g The crs fruits are of small size and have very few seeds. The fruit skin is variegated (red with yellow spots; see inset on the right) and has a rough cuticle. h-i Cross (h) and longitudinal (i) sections of the wild-type (up) and crs stem (down). Cortex cells of the crs mutant have a slightly smaller width and similar length. By contrast, mutant pith cells are much narrower than those of WT and twice as long, causing undulations in the cell rows, which most probably explains the helical growth. Bar (a-g) = 1 cm; Bar (h-i) = 100 μm

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