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Fig. 7. Valve histogenesis is disrupted in jag and jag nub
mutants. (A-C) Plastic-thin sections of valves from gynoecia of
stage 13 flowers from wild type (A), jag (B) and jag nub (C)
mutants. (A) Wild-type valves develop six tissue layers: an outer epidermal
layer (yellow arrowhead), three layers of mesophyll (blue arrowheads), one
layer of enb (red arrowhead) and a modified inner epidermal layer
termed the ena (green arrowhead). (C) In jag nub mutants,
one layer of mesophyll is often missing, and the enb and ena
layers lack the characteristics that differentiate them from other tissue
layers. (D) Graph showing the effects of the jag and jag
nub mutations on cell-layer number in the medial and lateral valve
regions. (E) Graph showing the effects of the jag and jag
nub mutations on the average cell width in the ena and
enb layers of the valves. Error bars indicate s.d. Scale bar: 25
µm.
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