Strawberries treated with blue light experneced a profoundly higher level of respiration rate after 4 days of storage. The ethylene production in the control fruit declined gradually during the first 8 days of storage, then decreased afterwards. However, in blue light-treated fruit, ethylene production decreased during the first 2 days of storage, increased dramatically and reached a maximum level on day 6th, then declined again until the end of the storage period.