Hydrogen Sulfide Alleviates Postharvest Senescence of Grape by Modulating the Antioxidant Defenses

Figure 1

Hydrogen sulfide (H₂S) treatment delays the senescence and rotting of Kyoho grapes in a dose-dependent manner. Grape clusters were fumigated with H₂S released from different concentrations of aqueous NaHS (0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, and 2.2 mM) and the photographs of grapes were taken every two days (a). Grape rachis of control and 1.0 mM NaHS treatment on day 5 of storage were presented in third panel of (a). Meanwhile, rotten fruit rates were recorded daily as shown in (b). The experiments and the following ones were carried out at 25°C and 85–90% relative humidity.

(a)

(b)