Physiological analysis of FOX1. (a) Lateral root number, (b) lateral root density, (c) fresh root weight, and (d) fresh shoot weight of Col-0 (black bars) and FOX1 (dotted bars). Three-day-old seedlings germinated on control media were transferred onto control media or media lacking K⁺ (−K) and grown for 11 days prior to measurement. Error bars indicate standard error. for (a) and (b), with each replicate containing 7 seedlings for (c) and (d). Statistically significant differences () compared to Col-0 are indicated as asterisks.