Unpicked avocado fruit showed no response to ethylene treatments given at 50 ppm for 48 hr. Picked ‘Hass’ fruit did not respond to ethylene treatments given immediately after harvest. A good response was observed to treatment given 25 or 49 hr after harvest. This may be explained by assuming the existence of an endogenous factor inhibiting ethylene action.
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Gazit et al. (1970) studied this question.
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