PRO2 — Solanum lycopersicum

Summary

SlPRO2 (SOLYC08G043170.4) encodes a bifunctional enzyme with glutamate 5-kinase and glutamylphosphate reductase activities, possessing D1-pyrroline-5-carboxylate synthetase activity. In tomato, this gene is associated with proline transport and regulation of proline anabolism, nitrogen fixation, the ascorbate-glutathione cycle, salicylic acid metabolism, polyamine metabolism, and upregulation of photosynthesis. It is linked to numerous traits including proline content, net photosynthetic rate, water use efficiency, chlorophyll content, seed size, leaf size, plant height, root volume, root length, shoot fresh weight, shoot dry weight, stomatal opening, and stomatal resistance. Associations also include drought tolerance, salt tolerance, freezing tolerance, arsenic tolerance, oxidative stress response, embryo development, pollen fertility, flowering time, and root meristem size. The protein localises to the cytoplasm, mitochondria, Golgi complex and plasmodesmata.