Shows under modified atmosphere, the respiration rate is slowed down; and therefore, there is less generation of radicals. Low O2 and high CO2 concentrations in packed chillies reduced the activation of the tissue softening enzymes allowing retention of firmness during storage. Low temperature storage also restrict tissue softening which may be due toreduction in respiration and transpiration rates, inhibition of cell-wall hydrolytic enzymes (polygalacturonase – PG, pectinmethylesterase – PME) as well as decreased ethylene production. Modified atmosphere packaging has been found to reduce the loss of firmness in the case of bell peppers at 10 ℃.