VI1 — Solanum lycopersicum

Summary

SlVI1 (SOLYC08G079080.5) encodes a beta-fructofuranosidase (invertase) with 6G-fructosyltransferase and O-glucosyl hydrolase activities, belonging to the Glyco_hydro_32 family. The protein is localised to the vacuole, vacuolar membrane and lumen. SlVI1 is associated with numerous fruit quality traits including fruit fresh and dry weight, fruit volume, firmness, colour, sweetness, and levels of fructose, glucose, sucrose, reducing sugars, total soluble sugars, starch, lycopene, carotenoids, and carbohydrates. It is also linked to flower abortion, inflorescence number, petal and flower colour, seed weight, root dry weight, leaf chlorosis and curling, leaf number, relative growth rate, respiration rate, CO2 assimilation, photosystem II quantum yield, and lateral root development. Additional associations include phloem unloading, cell wall organisation, response to carbon starvation, ethene metabolism, fructose metabolism, and sex differentiation. Studies of related genes in other species link the family to drought tolerance, low temperature tolerance, and carbon partitioning.