Sanitizers Affect Chemical Compositions and Physical Characteristics of Few-Flower Wildrices under Modified Atmosphere Packaging

摘要

The influence of different sanitizers on nutritional composition and lignification of sliced few-flower wildrice (Zizania latifolsa Turcz.) was investigated. Wildrice slices washed with 100 mg L~(-1) chlorine dioxide (CIO_2), 50 mg L~(-1) hydrogen peroxide (H_2O_2) and 80 mg L~(-1) peroxyacetic acid (PAA) were packed in micro perforated polyethylene film for 21 d at 2 deg C. Microbial growth, gas composition, soluble solids content (SSC), pH, whiteness index (Wl), vitamin C, phenols, firmness and lignin were determined every 7 d. Compared with water washing, three sanitizers inhibited microbial growth and browning, delayed lignification, and maintained tenderness of few-flower wildrice. CIO_2 was superior to other sanitizers in reducing microbial population and respiration activity, but caused significant SSC loss and lignification. PAA treatment retained better texture, higher vitamin C and phenol content than H_2O_2) but did not significantly affect microbial growth, Wl and lignin. Our data suggested that PAA washing pretreatment has more potential to keep the quality of fresh-cut few-flower wildrice.