Precooling and cold storage effects on antioxidant system in calla lily postharvest

ABSTRACT Low-temperature storage is one of the most effective techniques to maintain quality and durability cut flowers. Both maintenance are dependent on plant metabolism factors such as antioxidant system. The objective was evaluate effect low-temperature precooling after harvest, calla lily [Zantedeschia aethiopica (L.) K. Spreng] concerning system, levels hydrogen peroxide (H2O2), malondialdehyde (MDA). Therefore, different temperatures (4 ºC 21 ºC) were tested well in periods (0 24 hours). It observed that activity catalase (CAT) superoxide dismutase (SOD) increased at 4 °C, inflorescence commercial standard (around 12 days). At content H2O2 MDA higher visual reduction accelerated. leads a enzymes system (CAT SOD) increases postharvest longevity for lily. Precooling did not influence Long-term exposure low temperatures, with hours caused stress, evidenced CAT activity. SOD related temperature shorter resulted better lower levels.