Effect of Plant Extracts and Packaging on Control of Microbial Property and Antioxidant Activity of Basil

Subject Areas : Food-Borne Diseases

narjes  mansouri ¹ (Alumna of Vegetable Crops Physiology and Breeding, Ferdowsi University)
Mohammad  Moghaddam ² (Department of Horticulture, Faculty of Agriculture, Ferdowsi University of Mashhad)
fatemeh  kazemi ³ (Associate Professor, Department of Horticultural Science and Landscape Engineering, Ferdowsi University)
masomeh  bahraini ⁴ (Assistant Professor, Department of Biology, Ferdowsi University)
Hussain  Aroiee ⁵ (Department of Horticultural Science and Landscape Engineering, Ferdowsi University, Mashhad, Iran.)

Received: 2019-01-20 Accepted : 2019-04-18 Published : 2020-02-20

Keywords: Coliforms, Green tea, Packaging, Enterobacteriaceae, Khorasani Thyme,

Abstract :

In order to disinfection and increase the shelf life of vegetables, it is necessary to use natural compounds with suitable packaging. In this study, natural plant compounds were studied in reducing microbial load and their effect, along with two types of zip-plast and cellophane packaging on total phenolic content and antioxidant activity of basil. Hydro-alcoholic extracts of green tea and Khorasani thyme were prepared. Basil leaves were exposed to concentrations of 10, 20 and 40 percent of the extracts for 15 minutes. Then they were placed in the packaging of cellophane and zip-plast and storage with a relative humidity of 85% and a temperature of 7°C. Reduced bacterial count was measured after basil treatment by the different concentrations mentioned in both extracts. Total phenolic content and antioxidant activity basil were measured during the storage period for four periods. 40% concentration of green tea extract reduced the Enterobacteriaceae by 4.48 logarithms in basil samples. Extract concentration of 40% Khorasan thyme and green tea were able to bring coliform bacteria population to zero. In the survey of total phenolic content of basil during storage showed 10% concentration of Khorasan thyme extract at zip-plast packaging and in antioxidant activity of basil samples, 10% concentration of both extracts in zip-plast packaging had the least changes compared to fresh basil. In addition, green tea and Khorasan thyme extracts as natural compounds with high antioxidant and antimicrobial properties, along with zip-plast packaging, can be considered for increasing the shelf-life and reducing the microbial pollution of basil