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Thyme oil vapour and modified atmosphere packaging reduce anthracnose incidence and maintain fruit quality in avocado.
J Sci Food Agric 2013; 93(12):3024-31JS

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; ∼8% CO₂, 2% O₂) plus thyme oil (TO) was evaluated on the incidence and severity of anthracnose, physiological disorders (grey pulp, vascular browning), fruit quality parameters (L*, h°, 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 °C cold storage for 18 days and thereafter, ripened at 25 °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 °C followed by cold storage at 10 °C.

CONCLUSION

This investigation recommends MAP + TO combination treatment as a suitable alternative to the currently adopted prochloraz application.

Authors+Show Affiliations

Postharvest Technology Group, Department of Crop Sciences, Tshwane University of Technology, Pretoria 0001, South Africa.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23512681

Citation

Sellamuthu, Periyar Selvam, et al. "Thyme Oil Vapour and Modified Atmosphere Packaging Reduce Anthracnose Incidence and Maintain Fruit Quality in Avocado." Journal of the Science of Food and Agriculture, vol. 93, no. 12, 2013, pp. 3024-31.
Sellamuthu PS, Mafune M, Sivakumar D, et al. Thyme oil vapour and modified atmosphere packaging reduce anthracnose incidence and maintain fruit quality in avocado. J Sci Food Agric. 2013;93(12):3024-31.
Sellamuthu, P. S., Mafune, M., Sivakumar, D., & Soundy, P. (2013). Thyme oil vapour and modified atmosphere packaging reduce anthracnose incidence and maintain fruit quality in avocado. Journal of the Science of Food and Agriculture, 93(12), pp. 3024-31. doi:10.1002/jsfa.6135.
Sellamuthu PS, et al. Thyme Oil Vapour and Modified Atmosphere Packaging Reduce Anthracnose Incidence and Maintain Fruit Quality in Avocado. J Sci Food Agric. 2013;93(12):3024-31. PubMed PMID: 23512681.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Thyme oil vapour and modified atmosphere packaging reduce anthracnose incidence and maintain fruit quality in avocado. AU - Sellamuthu,Periyar Selvam, AU - Mafune,Mpho, AU - Sivakumar,Dharini, AU - Soundy,Puffy, Y1 - 2013/05/03/ PY - 2012/11/13/received PY - 2013/02/22/revised PY - 2013/03/19/accepted PY - 2013/3/21/entrez PY - 2013/3/21/pubmed PY - 2014/3/4/medline KW - antioxidant activity KW - essential oil KW - gas composition KW - thymol KW - total phenolic compounds SP - 3024 EP - 31 JF - Journal of the science of food and agriculture JO - J. Sci. Food Agric. VL - 93 IS - 12 N2 - 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; ∼8% CO₂, 2% O₂) plus thyme oil (TO) was evaluated on the incidence and severity of anthracnose, physiological disorders (grey pulp, vascular browning), fruit quality parameters (L*, h°, 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 °C cold storage for 18 days and thereafter, ripened at 25 °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 °C followed by cold storage at 10 °C. CONCLUSION: This investigation recommends MAP + TO combination treatment as a suitable alternative to the currently adopted prochloraz application. SN - 1097-0010 UR - https://www.unboundmedicine.com/medline/citation/23512681/Thyme_oil_vapour_and_modified_atmosphere_packaging_reduce_anthracnose_incidence_and_maintain_fruit_quality_in_avocado_ L2 - https://doi.org/10.1002/jsfa.6135 DB - PRIME DP - Unbound Medicine ER -