Cytological effects of different pH on Allium roots

The cytological effects of acid pH were studied using root meristems of Allum cepa. Increasing levels of acidity in the growth medium resulted in a corresponding reduction in root length, mitotic index and chromosome aberrations. There is an increase of both chromosomal and mitotic abnormalities, such as sticky bridges, along with the increase in acidity op to pH 3.5, when mitotic activity is inhibite