Pre-planting temperature treatments for breaking dormancy of garlic cloves
2003
Rahman, M.H. (Bangladesh Agricultural Univ., Mymensingh (Bangladesh). Dept. of Crop Botany) | Haque, M.S. | Ahmed, M.
Dormancy of garlic (Allium sativum L.) creates a problem in physiological and tissue culture experiments. A study was conducted to determine whether sprouting of garlic could be enhanced by pre-planting temperature treatments of the cloves. The effects of various temperature grades and duration on the sprouting and growth behavior were investigated using a local and an exotic cultivar of garlic. Three weight grades of garlic cloves were treated with low (8-10 degree centigrade), high (40 degree centigrade), room (27 degree centigrade), alternate high-low or low-high temperature for 14 days. The cultivars exhibited differential responses to temperature treatments before planting. Between the two cultivars, the exotic one completely failed to sprout under the experimental condition. The local cultivar showed enhanced sprouting and emergence, number of leaves/plantlet, plantlet height, number of roots, root length and percentage of normal plantlets. The low temperature and alternate high-low temperature treated cloves gave the highest percentage of sprouting (40%) whereas, low-high alternate temperature produced the lowest percent of sprouting (8.89%). The results revealed that treatments of cloves with different temperature levels have the potentiality to break dormancy and accelerate sprouting in garlic.
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