apple into a gas chromatograph (model G8A;
Shimadzu, Kyoto, Japan, in 2002 and model
5890A; Hewlett-Packard, Palo Alto, Calif., in
2003) (Fellman et al., 2003). Respiration and
ethylene evolution were measured from ve
apples from each experimental plot placed
inside Plexiglas chambers supplied with eth-
ylene-free air (Patterson and Apel, 1984).