ISHS Acta Horticulturae 343: Physiological Basis of Postharvest Technologies
CYCLOHEXAMIDE AND PHOSPHONATE EFFECTS ON THE SUSCEPTBILITY OF CITRUS FRUIT TO GREEN MOLD DECAY |
| Author: | B. Wild |
| Abstract:
Research at Gosford is examining the 'curing' response of the citrus fruit rind when it is damaged and how it is affected by the protein synthesis inhibitor cyclohexamide and the fungicide potassium phosphonate. If the curing process can occur fast enough it can prevent the development of decay caused by the molds, Penicillium digitatum and P. italicum. Previous research has shown that holding fruit at 35C and humidities greater than 75% for 2 to 3 days enhances this biochemical process, resulting in the formation of lignin and antifungal coumarin compounds. This treatment however can prematurely age and soften the fruit. Curing at lower temperatures can be enhanced by the use of the non-toxic compound, potassium phosphonate, which increases the rate of curing and prevents mold development in inoculated oranges. The response with phosphonate was most noticeable at 15C, while only slightly detectable at 35C when compared to the control. The compound itself has no effect on the molds in vitro. | |
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