TIP1 — Zea mays

Summary

ZmTIP1 (TIP1, ZmGAMMA-TIP) on maize chromosome 1 encodes an aquaporin TIP1-1 protein with water, urea, and channel activities, and is localized to the tonoplast, vacuolar membrane, and endomembrane system. The gene is associated with root hair elongation, response to water, hydrogen peroxide membrane transport, and microautophagy. It has been linked to agronomically important traits including grain yield, grain weight, grain size, plant height, root length, root dry weight, drought tolerance, heat tolerance, cold tolerance, chlorophyll content, turgor pressure, transpiration rate, stomatal resistance, abscisic acid content, proline content, oleic acid content, and seed development. Associations also include salt stress response, senescence, lateral root emergence, and water permeability. Studies of related genes in other species connect the family to water and urea transport, salt tolerance, and drought response.