Figure 1: Lignin staining and autofluorescence of Gossypium hirsutum seed fibres. Immature fibres viewed after Mäules reaction of (A) cut fibres and (B) a cut seed, (C) under brightfield and (D) with autofluorescence. Mature fibres viewed after Mäules reaction of (E) cut fibres and (F) a cut seed, (G) under brightfield and (H) with autofluorescence. Cut sites are indicated with an arrow. Palisade layer is indicated with an arrow-head. Bars = 100 μM.