Figure 5.

Split-root experiment using the pnp1-1 mutant. A, Plants were germinated and grown for 2 weeks on +P medium and transferred to −P conditions for 3 weeks. The root segments were excised and placed on −P or +P agar medium. Roots were photographed after 2 additional weeks on these media. B, Plants were germinated and grown for 2 weeks on +P medium and transferred to −P conditions for 3 weeks. The roots were then divided into −P or +P liquid medium while remaining attached to the plants and grown for an additional 2 weeks. The arrows indicate lateral roots that have recovered a wild-type-like phenotype.