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Fig. 5. Sector phenotypes in lg1-R;Wab1 mutants. (A) Abaxial view of yellow v4, wab1+/– sector, and (B) adaxial and (C) abaxial view of white, w3 wab1+/– sectors adjacent to ectopic sheath tissue. Arrowheads in A and B mark sector borders. (E) Fluorescence micrograph of a transverse section through the inner sector boundary of leaf shown in C. Green lg1-R;Wab1 tissue has the histological organisation of sheath, and albino wab1+/– tissue that of the blade. (D) SEM of adaxial surface of sector boundary shown in C and D, illustrating the sharp boundary between epidermal cell types in lg1-R;Wab1/wab1+ tissue (right of arrowhead) and lg1-R;wab1+/– tissue (left of arrowhead). (F) Fluorescence micrograph of a transverse section through another sector adjacent to marginal sheath-like tissue. The adaxial surface of green sheath-like tissue in D and F is hairless, whereas the albino tissue has hairs specific to blade. Scale bar: 100 µm (D-F).





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