STOP1 — Arabidopsis thaliana

Summary

AT1G34370, known as STOP1, encodes a C2H2-type zinc finger transcription factor with sequence-specific DNA binding activity, localised to the nucleus. In Arabidopsis thaliana, STOP1 is associated with proton stress resistance, root growth tolerance under phosphate starvation, phosphorus efficiency, and responses to acidic pH, hypoxia, iron, and aluminium. The gene is linked to malate secretion, nitrate import, strigolactone and cytokinin anabolism. Phenotypic associations include acid soil sensitivity, salt tolerance, calcium deficiency tolerance, drought tolerance, low-oxygen tolerance, and regulation of root cell elongation, lateral root length, and root thickness. STOP1 is also connected to potassium uptake and ammonium ion homeostasis. Studies of related zinc finger STOP1-like proteins in other species further link the family to similar stress tolerance and nutrient acquisition processes.