"Fig. 6 collects the results obtained when these three treatments are applied to the strain expressing integrated copies of the
pho-1::GFP/lacZ reporter transgene. As the zygotic POP-1 levels increase from Treatment I through Treatment III, both the fraction of embryos expressing the transgenic
pho-1::GFP/lacZ reporter and the number of GFP-positive cells within each expressing embryo decrease. These same (or similar) treatments produce opposite effects on anteriorly-expressed markers such as
ges-1ΔB (Schroeder and McGhee, 1998; D. Schroeder, TF and JDM, unpublished results). We conclude that
pho-1 does indeed respond to the C. elegans Wnt pathway and behaves as if it is repressed by high zygotic POP-1 levels."