Effect of ozone treatment on physicochemical parameters and ethylene biosynthesis inhibition in Guichang Kiwifruit

To determine whether ozone can regulate fruit ripening and delay aging, Kiwifruit (Actinidia deliciosa 'Guichang') was fumigated with different concentrations (100 μL/L, 200 300 μL/L) for 3 h, stored at 1 °C 85 ± 5% RH three months, then matured 20 85% 12 days. Compared controls, the optimal concentration of delayed kiwifruit during cold storage by delaying respiratory burst that precedes decay. Consequently, firmness, nutrient content, enzyme activity remained stable; expression AdACS1 AdACO1 as well ACC synthetase (ACS) oxidase (ACO) downregulated, whereby MACC were accumulated. In addition, ozone-treated showed significantly reduced infection grey mold. The effect on μL/L best suited senescence, maintaining high quality compared other fruits. Overall, our study indicated may play a major residual role in physiological process ripening; furthermore, affect ethylene biosynthesis changes associated endogenous production.