PR2 — Solanum lycopersicum

Summary

SlPR2 (SOLYC01G008620.4) on tomato chromosome 1 encodes a glucan endo-1,3-beta-D-glucosidase with lichenase activity, belonging to the glycosyl hydrolase 17 family. In tomato, this gene is associated with disease resistance, including virus resistance, and has been linked to induced systemic resistance and virus-induced post-transcriptional gene silencing. It is also associated with abscission, embryogenesis, cotyledon development, and responses to water and host invasion. The encoded protein localizes to the vacuole and extracellular space. Associations with agronomic traits include fruit weight, shoot fresh weight, sugar and protein content, germination rate, seed maturation, root length, chlorophyll content, photosynthetic rate, transpiration rate, water use efficiency, stomatal resistance, and photochemical quenching. Studies of related genes in other species link the family to drought tolerance and disease tolerance.