| Title: | Thyme oil vapour and modified atmosphere packaging reduce anthracnose incidence and maintain fruit quality in avocado |
| Author(s): | Sellamuthu PS; Mafune M; Sivakumar D; Soundy P; |
| Address: | "Postharvest Technology Group, Department of Crop Sciences, Tshwane University of Technology, Pretoria 0001, South Africa" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| Abstract: | "BACKGROUND: Postharvest application of prochloraz fungicide is commercially practiced to control anthracnose, a postharvest disease in avocado. Increasing consumer concern regarding food safety and demand for organically produced fruits make it necessary to search for natural environmentally friendly alternative products and processes for the fruit industry. RESULTS: A combination of modified atmosphere packaging (MAP; approximately 8% CO(2), 2% O(2)) plus thyme oil (TO) was evaluated on the incidence and severity of anthracnose, physiological disorders (grey pulp, vascular browning), fruit quality parameters (L*, h degrees , firmness, weight loss) and sensory parameters (taste, texture, flavour and overall acceptance), phenylalanine ammonia-lyase (PAL) enzyme activity, total phenolic compounds, flavonoid contents and antioxidant activity in avocados ('Fuerte' and 'Hass' cultivars) held at 10 degrees C cold storage for 18 days and thereafter, ripened at 25 degrees C for 5-10 days. Stand-alone MAP, commercial treatment (prochloraz 0.05%) and untreated (control) fruit were included for comparison. MAP + TO treatment significantly (P < 0.05) reduced the incidence and severity of anthracnose, grey pulp, vascular browning, weight loss and loss of fruit firmness, and showed acceptable taste, flavour, texture and higher overall acceptance, increased PAL activity, total phenolic compounds, flavonoid contents and antioxidant activity, after ripening at 25 degrees C followed by cold storage at 10 degrees C. CONCLUSION: This investigation recommends MAP + TO combination treatment as a suitable alternative to the currently adopted prochloraz application" |
| Keywords: | "Antioxidants/analysis/pharmacology Chemical Phenomena Cold Temperature Flavonoids/analysis *Food Packaging *Food Preservation *Food Quality Food Storage Fruit/*chemistry/enzymology Humans Maillard Reaction Mechanical Phenomena Oils, Volatile/*chemistry Pe;" |
| Notes: | "MedlineSellamuthu, Periyar Selvam Mafune, Mpho Sivakumar, Dharini Soundy, Puffy eng Research Support, Non-U.S. Gov't England 2013/03/21 J Sci Food Agric. 2013 Sep; 93(12):3024-31. doi: 10.1002/jsfa.6135. Epub 2013 May 3" |
