Figure S1. Structure of the T–DNA insertion in the pcap2 mutant line SALK_021652.

Figure S2. Root hair length of pcap2 heterozygous mutant plants.

Figure S3. The length of each root hair and its distance from the root tip on wild-type and pcap2 roots.

Figure S4. Phenotype of the pcap2 mutant seedling and root hair cells.

Figure S5. Phenotypes of root hairs expressing GFP-tagged PCaP2 and its variants.

Figure S6. Rescue of the N23 phenotype by expression of PIP5K3–YFP.

Table S1. Primer sets used for PCR in this study.

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