Heat Treatment and Wounding as Abiotic Stresses to Enhance the Bioactive Composition of Pineapple By-Products

Abiotic stress, like heat treatment and wounding, applied to pineapple by-products induce the accumulation of new compounds add value. In this work effect individual or combined application wounding stresses on total phenolic content, antioxidant activity through complementary methods (DPPH, FRAP, ABTS) enzymatic (bromelain, phenylalanine ammonia lyase (PAL) polyphenol oxidase) were evaluated. Whole wounded shell core dipped in a hot water bath at 30 ± 1 °C 40 for 10 min stored under refrigeration conditions (4 °C) 24 h 48 h. Results allowed that reacted differently tested stresses. For core, (40 before storage (24 h) induced synergistic phenols (increased 17%) (4–22%). samples, most increased content (14%) (38–45%) was Treatments positively influenced samples did not affect bromelain PAL. This study showed proper abiotic could increase functional value by-products.