YS1 — Sorghum bicolor

Summary

SORBI_3006G053100 (YS1, SbYS1) on sorghum chromosome 6 encodes a metal-nicotianamine transporter YSL6 with Fe-NA chelate transporter activity and oligopeptide transmembrane transporter activity. This gene is associated with iron ion membrane transport, responses to iron and zinc, glutathione and sucrose metabolism, phenylpropanoid and lignin anabolism, defense response, signal transduction, seed development, and developmental processes involved in reproduction. It has been connected to grain filling period, photosynthetic rate, chlorophyll content, heavy metal stress response, heavy metal stress tolerance, chromium stress response, iron tolerance, iron deficiency tolerance, iron homeostasis, seed iron content, copper distribution, mineral transport, copper remobilization, iron remobilization, zinc remobilization, metal ion homeostasis, and copper homeostasis. The encoded protein localizes to multiple cellular membranes including the plastid envelope, tonoplast, vacuolar membrane, Golgi, mitochondria, and plasmalemma. Studies of related YSL family members in other species link this gene family to seed metal loading, metal remobilization during senescence, iron and zinc transport, and tolerance to saline-alkaline stress.