HSP21 — Triticum turgidum subsp. durum

Summary

TRITD4BV1G136930 (HSP21, also known as TtHSP26) on durum wheat chromosome 4B encodes an SHSP domain-containing protein with an HSP20-like chaperone domain and is associated with NAD-L-malate dehydrogenase activity, AAA chloroplast protein-transporting ATPase activity, and protein binding. The gene is linked to responses to heat, cold, light, hydrogen peroxide, salinity, and osmotic stress, as well as protein folding, detoxification, plastid transcription, chloroplast organization, and embryo development. It is localized to the chloroplast stroma, thylakoid membrane, envelope, and nucleoid. Associations include heat tolerance, thermomemory, oxidative stress tolerance, plastid genome stability, and stomatal resistance. Studies of related genes in other species connect the family to grain yield, grain weight, grain size, seed germination, chlorophyll content, drought tolerance, and cold tolerance.