DPA treatment alters α-farnesene metabolism in peel of ‘Empire’ apples stored in air or 1.5% O2 atmosphere

摘要: Abstract Treatment with diphenylamine (DPA), sometimes in combination storage under low (≤1.5%) O 2 atmosphere, is the major commercial means of limiting superficial scald apple fruit. Synthesis and oxidation sesquiterpene α-farnesene are thought to be directly involved induction this disorder. Control by DPA has been ascribed its ability block both vitro vivo conjugated trienes (CTs), but a number reports have indicated that multiple effects, including reduction synthesis, ethylene production, respiration. The time course levels CT accumulation peel tissue were compared ‘Empire’ apples either DPA-treated or untreated stored for up 28 weeks at 0°C air 1.5% atmosphere. Also, it was found HPLC-UV method previously developed quantify CTs could used simultaneously measure concentration residue. In air-stored fruit, treatment protracted rather than diminished synthesis; similar maximum level reached 15 respectively. delayed onset production ∼5 reduced more 2.5-fold. atmosphere overall effective reducing synthesis α-farnesene. combination, however, had synergistic effect, resulting ninefold virtual elimination over weeks. , residue declined rapidly during first gradually thereafter, an drop from ∼11 1.1 μg g −1 .