YS1 — Oryza sativa Japonica

Summary

OsYS1 (YSL1) on rice chromosome 1 encodes a member of the YSL-like/OPT family with Fe-NA chelate transporter and oligopeptide transmembrane transporter activity. In rice, the gene is associated with seed iron concentration, grain metal content, and saline-alkaline stress tolerance, as well as iron and zinc responses, phytoalexin biosynthesis, nitrogen fixation, phloem transport, and detoxification. It is linked to leaf temperature, grain filling period, leaf chlorosis, iron concentration, harvest index, net photosynthetic rate, transpiration rate, photosynthetic rate, stomatal resistance, grain weight, plant height, grain yield, and chlorophyll content. Localisation evidence connects the product to the plastid envelope, tonoplast, vacuolar membrane, Golgi, mitochondria, and plasma membrane. Studies of related genes in other species link the family to seed metal loading, copper and zinc remobilisation, and fertility, while tobacco studies connect it to seed nicotianamine and iron accumulation.