چکیده (انگلیسی):

Food preservatives play important role in today’s food supplies that are used to prolong
the self-life of products by protecting them from deterioration caused by micro-organisms.
In this study, investigations were carried out to study the impacts of food preservatives
like butylated hydroxytoluene, butylated hydroxyanisole, sorbic acid, propyl gallate and
sodium nitrate. The effects of these preservatives at concentration of 1000 ppm, 1500 ppm,
2000 ppm, 2500 ppm for 4 h, 8 h and 16 h of exposure period were studied on the root
tips of Allium cepa. Cytological studies revealed statistically significant (p < 0.05) inhibition
in mitotic index with an increase in concentration of the food preservatives when compared
with the control. Most frequent cytological abnormalities observed were bridges,
multipolarity, C-mitosis, stickiness and cell death. The total percentages of abnormalities
were also increased with increasing concentration and time duration. The abnormalities
(%) in root system caused by used preservatives were recorded as butylated hydroxytoluene
< butylated hydroxyanisole < sodium nitrate < sorbic acid < propyl gallate.