P5CS1 — Brassica oleracea var. botrytis

Summary

BoP5CS1 on cauliflower chromosome 3 encodes a protein with glutamate 5-kinase and glutamylphosphate reductase activities, classified as D1-pyrroline-5-carboxylate synthetase. This gene is associated with L-proline biosynthesis and transport, and is linked to responses to desiccation, hyperosmotic salinity, oxidative stress, abscisic acid, and thirst. It is associated with root development, microsporogenesis, seed germination, the vegetative-to-reproductive transition, and signal transduction. The encoded product localises to the cytoplasm, mitochondria, and Golgi complex. Associations with proline content and accumulation, photosynthetic rate, pollen fertility and development, salt, drought, freezing, arsenic, and water stress tolerance, flowering time, inflorescence architecture, root meristem size and elongation, and NADP/NADPH ratio have been observed. Studies of related genes in other species link the family to osmotic stress tolerance, drought resistance, root elongation, heat tolerance, and abiotic stress tolerance.