SPS — Beta vulgaris subsp. vulgaris

Summary

BvSPS (BVRB_6G149100) on sugar beet chromosome 6 encodes a protein with both spermine synthase and spermidine synthase activities. The gene is associated with spermine, spermidine and polyamine anabolism, and has been linked to sucrose metabolism, nitric oxide storage, proteolysis, signal transduction, defence response to bacteria, and cell development. It localises to the mitochondria, cytosol, plasma membrane and nucleus. Associations with traits include photosynthetic rate, respiration rate, jasmonic acid content, high temperature stress response, disease tolerance, and salt tolerance. Phenotypic connections include drought tolerance, thermotolerance, disease resistance to Botrytis cinerea and Pseudomonas syringae, and root growth inhibition. Studies of related genes in other species link the family to fruit sweetness, starch and sucrose content, and chilling stress response.