Effects of Cutting Direction, Ethylene Treatment, and Low O₂ and/ or High CO₂ of Atmosphere on the Appearance, Occurrence of Bitterness, and Changes of Sugar Contents in Partially Processed Carrot during Holding

Studies on Physiological and Chemical Changes of Partially Processed Carrot-Part VI

Abstract

The C₂H₄ induced the occurrence of bitterness and the pitting injury and the combination of low O₂ (4%) and high CO₂ (18%) in the atmosphere suppressed these changes apparently in partially processed carrot (PPC).The PPC showed a decrease in the contents of soluble total sugar (TS) and non-reducing sugar (NRS) and the increase of reducing sugar (RS) by C₂H₄ treatment during holding at 20°C. The low O₂ or high CO₂ in the atmosphere delayed the decrease of TS and NRS and the increase of RS induced by C₂H₄ (20ppm) and the combination of low O₂ and high CO₂ in the atmosphere suppressed these changes apparently during 5 days holding at 20°C.