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KMID : 0903620010420020147
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Journal of the Korean Society for Horticultural Science
2001 Volume.42 No. 2 p.147 ~ p.150
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Effect of Root Zone Temperature on the Growth , Mineral Contents , and Activities of Antioxidative Enzymes of Tomato Plug Seedlings
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Abstract
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This study was carried out to examine the effect of root zone temperature on the growth, mineral contents, and activities of antioxidative enzymes in Lycopersicum esculentum ´Segkun´. Tomato seeds sown in 50-cell plug trays were germinated for 4 days in a growth chamber at 28℃. Then the seedlings were grown for 50 days on greenhouse benchs, each with a root zone temperature of either ambient, 10, 15, or 25℃, while night temperature of 10℃. Shoot height, leaf length, leaf count, stem diameter, and fresh and dry weights were affected by root zone temperature. Overall growth, and total-N, Ca, Mg, Mn, and Fe contents increased with 25℃ root zone temperature. Root zone temperature had a significant influence on the growth and mineral contents in tomato seedling. Activities of antioxidant enzymes such as ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and catalase (CAT) in root of tomato were increased with 15℃ root zone temperature.
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