reported significant differences in glucose and pyruvate content of dry onion bulbs under controlled atmosphere storage, which were dependent on both the analyzed cultivar and bulb section. reported significant changes in flavonols and sugars content during long-term storage at different light regimes, whereas reported that storage at transparent polystyrene cups under light conditions or after freeze-drying resulted in increased total flavonol content. Similarly, pungency, flavor and sugars content remained unaffected when bulbs stored under controlled atmospheres, whereas storage at 5 C, controlled atmospheres or field conditions increased pungency, pH and flavonols, and decreased soluble solids content and bulb firmness