RESPIRATION MEASUREMENT OF SOME IMPORTANT FRUITS IN TAIWAN

M.L. Liao, M.S. Liu, J.S. Yang
Among the non-climacteric fruits, carambola, wax apple and pineapple were found to have a very low respiration rate of 10–20 mg CO2/Kg.h at 20°C, although they are highly perishable fruits. Loquat had a respiration rate of 30–40 mg CO2/Kg.h. Without any preformed injuries, the sound fruits showed a good keeping quality at 2–5°C. Lychee, longan and Indian jujube are the three fruits with much higher respiration rate (60–80 mg CO2/Kg.h), therefore, their short storage life are predicted. All the six citrus spp. harvested at mature-green stage respired at a low rate (10–20 mg CO2/Kg.h) and produced essentially no detectable ethylene.

Typical climacteric pattern occurred at 20°C for sugar apple, guava, pear, mango and persimmon. Sugar apple exhibited a maximum respiration rate higher than 200 mg CO2/Kg.h at 20°C, while maximum ethylene production rate was lower than 1.0 ul/Kg.h. Guava had a maximum respiration rate of 130 mg CO2/Kg.h and ethylene production of 2–3 ul/Kg.h at 20°C. The rise of respiration rate of Herng-San pear was slow (25–30 mg CO2/Kg.h at maximum) in contrast to the rapid change of ethylene evolution (10 ul/Kg.h at peak). Mango of Keitt variety had a maximum respiration rate of 60 mg/Kg.h. Persimmon fruits treated with 0.2ml of 4N KOH solution exhibited a climacteric rise much earlier than those ripened naturally. The climacteric peak value was about 30 mg CO2/Kg.h at 20°C. For both mango and persimmon, only trace amount of ethylene was detected during the experiment.

Liao, M.L., Liu, M.S. and Yang, J.S. (1983). RESPIRATION MEASUREMENT OF SOME IMPORTANT FRUITS IN TAIWAN. Acta Hortic. 138, 227-246
DOI: 10.17660/ActaHortic.1983.138.26
https://doi.org/10.17660/ActaHortic.1983.138.26

Acta Horticulturae