PG2 — Solanum lycopersicum

Summary

SlPG2 (PG2) on tomato chromosome 10 encodes a polygalacturonase enzyme, belonging to the Glyco_hydro_28 family and containing a pectin lyase fold. It is associated with cell wall disassembly and pectin metabolism, and has been linked to carotenoid and chlorophyll breakdown, as well as phosphoglyceride metabolism and regulation of microtubule dynamics. The protein localizes to the apoplast, extracellular region, and amyloplast. SlPG2 is associated with numerous fruit quality and agronomic traits, including fruit firmness, size, weight, surface area, color, and lycopene, carotenoid, sugar, reducing sugar, anthocyanin, and chlorophyll content. It is also associated with plant height, leaf length and number, stem diameter, seedling vigor, germination rate, seed maturation, pollen fertility, cytoplasmic male sterility, and high temperature stress response. Studies of related genes in other species link the family to silique dehiscence, seed dispersal, abscission, root cell elongation, and defense responses.