SPS — Solanum tuberosum

Summary

PGSC0003DMG400036131, designated StSPS on potato chromosome 8, encodes a protein with putrescine N-methyltransferase, spermidine synthase and spermine synthase activities. The gene is associated with the biosynthesis of spermidine, spermine, putrescine, nicotine, sucrose, starch and phenylpropanoids, as well as with sucrose breakdown, carbohydrate metabolism, circadian rhythm and the response to insects. Its product localises to the cytosol, nucleus, mitochondria and plasma membrane. StSPS is associated with starch yield and content, sugar and protein content, photosynthetic rate, chlorophyll content, plant height, respiration rate, jasmonic acid content, high-temperature stress response, disease tolerance and salt tolerance. Associations also include drought stress response, thermotolerance, nematode susceptibility, salicylic acid-mediated defence and resistance to Botrytis cinerea and Pseudomonas syringae.