Journal of Pure and Applied MicrobiologyVol. 9 No. Special Edition May. 2015

Targeting the Residential Microflora to Enhance the Mean Life of Raw Lycopersicum esculentum by Gamma Irradiation

Roheena Abdullah*, Maryam Akbar, Hina Qaiser, Adeen Farooq, Mehwish Iqtedar, Afshan Kaleem, Mahwish Aftab and Shagufta Naz

Department of Biotechnology Lahore College for Women University, Lahore, Pakistan.

Received on 25 March 2015 and accepted on 16 May 2015

 

ABSTRACT

The effects of gamma irradiation on the microbial content and sensory attributes of tomato (Lycopersicum esculentum) were analyzed. Fresh fruits harbor high contaminating microflora influencing its quality and mean life. Irradiation (1.0, 1.5, 2.0 kGy) as cold pasteurization followed by storage under refrigerated conditions have been employed to ensure the microbial safety and extend the shelf life of tomatoes. In this study radiation dose of 2.0 kGy worked remarkably well to reduce both the bacterial as well as mold and yeast counts while preserving the sensory qualities for the longest duration of time when compared to other treatments. The shelf life of samples exposed to 2.0 kGy was extended to 21 days at 4 C against only 14 days for control samples.

Keywords : Microflora, Tomato, Radiation, Shelf Life.