Abstract

Papaverine hydrochloride induces c-tumours in root tips of Allium cepa. Two types of enlargements were noticed, complete swelling along the majority of the root and complete swelling with a certain enlargement immediately after the 2 mm terminal tips. The histological examination of these zones revealed that these swelling were due to cell enlargement both in meristematic and in tumour zones. This conclusion was evidenced from the result obtained of the nucleoplasmic index.Papaverine hydrochloride and morphine sulphate showed roughly polyploid roots as the concentration of the chemical increased. The effect of cannabis dissolved in water on the rate of polyploid induction varied according to the concentration applied.

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