LSI1 — Oryza sativa Japonica

Summary

OS02G0745100 (LSI1) on rice chromosome 2 encodes an aquaporin-family protein with channel activity for water, lactate, arsenite, silicate, glycerol, borate and urea. It is associated with silicon transport, salt stress, chilling, and resistance, and has been linked to grain traits, leaf and phloem function, and dwarf phenotypes. The gene is associated with phytochelatin metabolism, silicic acid and borate transport, hydrogen peroxide membrane transport, and the ascorbate-glutathione cycle. It localises to the plasma membrane, lateral plasma membrane, Casparian strip and ER. Associations also include harvest index, grain number, grain weight, grain yield, chlorophyll content, stomatal resistance, salinity tolerance, and potassium uptake. Studies of related genes in other species link the family to boron and arsenic transport, aluminum tolerance, and reproductive development.