PIP1 — Sorghum bicolor

Summary

SORBI_3002G124700 (SbPIP1) on sorghum chromosome 2 encodes an uncharacterized protein with an aquaporin-like domain. The gene is annotated with channel activity, phospholipase D activity, and multiple additional molecular functions including peptide binding and kinase activity. It is associated with carbon dioxide transport, cellular water homeostasis, hydrogen peroxide membrane transport, and phosphatidic acid metabolism. SbPIP1 is linked to diverse agronomic traits including drought stress response, cold stress response, photosynthetic rate, stomatal opening and resistance, root and seed growth traits, flowering time, disease tolerance, and responses to aluminum, low humidity, and desiccation. The protein localizes to the plasma membrane region, plant-type cell wall, chloroplast envelope, and other cellular compartments. Studies of related genes in other species connect this gene family to water transport, root water uptake, stomatal closure, drought tolerance, and yield-related traits.