Abstract
Roots of Allium cepa have been treated with phenethyl alcohol. Two per cent phenethyl alcohol inhibited growth completely. At lower concentrations, removal of the inhibitor allowed at least a partial recovery. In the treated root tip cells, the chromosomes fail to coil and condense even after colchicine treatment. Often the chromosomes give a peculiar appearance involving the alteration of chromatic and achromatic segments giving an eroded or beaded appearance. Acentric fragments, achromatic lesions, general stickiness and bridges at anaphase are also encountered. It is suggested that the inhibition of growth and visible effects on the chromosomes following the treatment might be the result of two separate processes.
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