RELATION OF THE PRODUCTION OF AN ACTIVE EMANATION TO RESPIRATION IN THE AVOCADO FRUIT

Abstract

The CO2 evolution of Fuerte and Habal avocados was studied at 3 different temps. At 15[degree] and 25[degree] C a pronounced climacteric rise was observed; at 5[degree] C there was no well-defined increase. Associated with the climacteric rise was the production of an active emanation, presumably ethylene, as shown by the triple response of etiolated pea seedlings. Although there was no obvious climacteric rise at 5[degree], a cycle of emanation production was observed, after which the fruit showed a post-climacteric CO2 response when transferred to a higher temp. Treatment of pre-climacteric fruit with ethylene caused an earlier onset of the climacteric and more uniform softening.