Control of Green Mold of Stored Oranges by Phenolic Compounds
Since stored citrus fruit are very sensitive to the development of green mould caused by Penicillium digitatum, fungicides are worldwidely applied to reduce losses caused by this fungi. However, fungicide is facing some obstacles; i) increasing public concern regarding contamination of fruits with fungicidal residues, ii) development of resistant strains in the pathogen population, and iii) disposal of exhausted water. The present study deals with the potential control of green mold of oranges by postharvest application of phenolic compounds. Quercetin, scopoletin and scoparone, found in several agricultural commodities and associated with stress response, were evaluated for their ability to control green mould incidence and severity when exogenously applied on oranges cv Navelina. Twenty 1 of 5 mg/ml phenolic solutions were applied per wound. Oranges were lately wound-inoculated with P. digitatum (5×104 conidia/ml) and stored at (16 ± 1 )℃ for 14 days. Disease incidence and severity were evaluated at 2 days intervals. On phenolic-treated oranges symptom appearance was delayed and after 10 days of incubation, quercetin, scopoletin and scoparone reduced incidence of decay and disease severity by 40％ -60％ and 60％ -70％ , respectively, as compared to the control, being scoparone the most active. On the basis of the available results, these compounds might represent an interesting alternative to synthetic fungicides. However, large scale trials are needed further to validate the results and to elucidate their possible mode of actions.
Oranges Phenolic compounds Postharvest PenicUlium digitatum
S. M. Sanzani A. Ligorio I. Pentimone F. Nigro A. Ippolito L. Schena
Department of Plant Protection and Applied Microbiology, University of Ban, Via G. Amendola 165/A, 7 Department of Agricultural and Forest Systems Management, Mediterranean University of Reggio Calabri
国际会议
11th International Citrus Congress(第11届国际柑橘大会)
武汉
英文
1383-1387
2008-10-01（万方平台首次上网日期，不代表论文的发表时间）