Figure 1. Hydrogen sulfide (H₂S) delays the rotting of fresh-cut pear in a dose-dependent manner.

Pear slices were fumigated with H₂S released from different concentrations of NaHS as shown in the lower right part of photographs (A), and the photographs were taken on day 0, 2 and 4, and the rot index (B) of pear slices was recorded every two days from day 0 to 10. (C) Change of firmness in fresh-cut pear for water treatment (CK) and 2 mM NaHS treatment (H₂S) during storage at 20°C for 0−6 days. Data are presented as means ± SD (n = 6). * and ** in this figure and following ones stand for significant difference between CK and H₂S at P<0.05 and P<0.01, respectively.