SPMS — Oryza sativa Indica Group

Summary

BGIOSGA006759 (SPMS, OiSPMS) on chromosome 2 of Indica rice encodes a protein with spermine synthase and spermidine synthase activities, and also possesses DNA-binding transcription factor activity and protein-binding capability. The gene is associated with spermidine anabolism, spermine anabolism, the ascorbate-glutathione cycle, polyamine anabolism, the shikimate pathway, indole glucosinolate anabolism, induced systemic resistance, defense response by callose deposition in cell wall, response to insect, response to bacteria, homeostasis, and defence response to bacteria. It is linked to traits including jasmonic acid content, photosynthetic rate, chlorophyll content, disease tolerance, salt tolerance, drought stress response, thermotolerance, grain yield, grain size, seed germination, and plant growth. The encoded protein localizes to mitochondria, cytosol, plasma membrane, cytoplasm, and nucleus. Studies of related genes in other species connect the family to polyamine metabolism, heat stress tolerance, callose deposition, resistance to bacterial pathogens, and indolic glucosinolate biosynthesis.