Grain filling is the final stage in rice growth at which the fertilized ovaries develop into caryopses. The filling rate and extent determine the final weight of the rice grain and these factors are vital to grain yield and quality.
Seed filling is the terminal stage of growth in plants where fertilized ovaries form caryopses/inflorescences, and involves several processes related to the import of constituents, and biochemical processes associated with carbohydrate, protein and lipids synthesis in seeds