Impact of Growth Regulators on Cormel Production and Dormancy Breaking in Elephant Foot Yam [Amorphophallus paeoniifolius (Dennst.) Nicolson]
Abstract
Elephant foot yam ( Amorphophallus paeoniifolius (Dennst.) Nicolson) is a popular tropical tuber crop grown for its starchy corms. It is propagated through both corms and cormels. A field experiment followed by post-harvest study was conducted during 2008-2010 at Regional Centre of Central Tuber Crops Research Institute, Dumuduma, Bhubaneswar, India, to find out the effect of growth regulators on cormel production, dormancy breaking and sprout growth. The results revealed that pre-harvest foliar spraying (at 5 and 6 MAP) followed by post-harvest application (soaking the corms for 30 min) of thiourea 200 ppm reduced corm dormancy by 21 days and increased the sprout growth. Pre-harvest application of potassium nitrate 200 ppm was found to be effective in inducing cormels. This growth regulator can be tried in cormel producing varieties for better cormel production.
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