Figure 1.

Mutant Phenotypes and Map Positions of Genes Involved in Root Hair Morphogenesis.

(A) Root hairs of wild-type and single mutant seedlings. Mature root hairs of mutants at each new locus are shown alongside those of plants mutated at previously identified loci (rhd6, rhd2-1, rhd3-1, tip1-2, and cow1-1).

(B) Locations on the Arabidopsis genetic map of genes involved in root hair formation. Shown for comparison are previously published map positions of other loci included in this study: RHD1, RHD2, and RHD3 (Schiefelbein and Somerville, 1990); RHD6 (Masucci and Schiefelbein, 1994); TIP1 (Ryan et al., 1998); and COW1 (Grierson et al., 1997).