Abstract
Bell pepper fruit (Capsicum annuum L. cv. Lamuyo) at two stages of maturity, mature green (MG) and mature red (MR), were stored at 2 and 10 °C to investigate physiological changes resulting from chilling injury. The MG fruit showed evidence of chilling injury (surface pitting) when stored at 2 °C, while MR fruit were unaffected by cold. At the same time, differences in the evolution of plant regulators were detected: In chilling-sensitive MG peppers, ethylene evolution and levels of 1-aminocyclopropane-1-carboxylic acid (ACC), putrescine (Put), and abscisic acid (ABA) rose significantly during storage, while in MG fruits stored at 10 °C and MR fruit stored at both 2 and 10 °C the values were low and no changes were observed. Spermidine (Spmd) content remained low in fruits at both maturity stages and at both temperatures. Chilling injury was reduced in MG fruits stored at 2 °C when modified atmosphere packaging (MAP) was used, particularly with the less permeable film. MAP also led to less pronounced inc...
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