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Fig. 5. Action of the CLV pathway on the WUS promoter. (A-F)
Light micrographs of live plants. (A) Wild-type seedling 1 week after
germination. The first true leaves (arrow) are visible between the cotyledons
(c). (B,C) wus-1 mutant (B) and CLV1::CLV3-expressing (C)
seedlings one week after germination. No leaves are visible between the
cotyledons (arrow), indicating a defective SAM. (D) Terminated inflorescence
of a CLV1::CLV3-expressing plant. (E,F) CLV1::WUS (E)- and
CLV1::WUS; CLV1::CLV3 (F)-expressing seedlings 12 days after
germination. In both cases, the meristem is considerably enlarged (arrow)
compared to wild type. Scale bars: 1 mm.