抄録
Comparative cytomorphological studies between diploid (2n=28) inbred and colchicine induced auto-octoploids of medicinally important solanaceous plant H. muticus were made. In auto-octoploids the increase in most of the morphological characters such as thickness of the main shoot, leaf size, floral parts and size of stomata and pollen grains was accompanied by reduction in plant height and number of branches. The meiotic chromosome behaviour of the auto-octoploid plants was studied in detail. The high percentage of pollen sterility and very poor or no setting of seeds were attributed mainly to the chromosomal irregularities recorded during meiotic division
