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Fig. 3. Stem cell specification in the root apical meristem. Stem cell activity is regulated by both the FEZ pathway (right) acting downstream of PIN1-directed auxin flux and the PLT proteins, and by G1 regulators acting downstream of the SHR/SCR pathway (left). Stem cells are shown in pink, with the stem cell subpopulation that specifically responds to the FEZ pathway and `G1 regulators' shown in dark pink. Image courtesy of Ben Scheres.





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