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KMID : 1024520140230050781
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Journal of the Environmental Sciences
2014 Volume.23 No. 5 p.781 ~ p.786
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The Influence of Abnormally Low Temperatures on Growth and Yield of Hot Pepper(Capsicum Annum L.)
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Park Eun-Ji
Heo You
Son Beung-Gu
Choi Young-Whan
Lee Yong-Jae
Park Young-Hoon
Suh Jeong-Min
Cho Jae-Hwan
Hong Chang-Oh
Lee Sang-Gyu
Kang Jum-Soon
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Abstract
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Growth and physiological disorders caused by abnormally low temperatures were evaluated in pepper, an important field
crop in Korea. In addition, the effects of chemical treatment using glutamine was verified on minimizing the damages by low temperature. The growth of pepper plants in stem length and diameter was suppressed as the temperature decreased from 25℃,and the suppression level was the highest for plants grown for 90 days at 20℃. However, root growth was not affected by the different temperatures. The number of leaf and leaf area decreased at the temperatures below 25C, an optimum temperature for growth. Fresh weight and dry weight decreased for plants grown at 20℃. Pepper fruit yield also decreased by 11% at 20℃ in comparison to 25℃. Falling blossom rate was different depending on the growth temperature, and the rate was 27.2% at 25℃,35.2% at 22.5℃, and 41.0% at 20℃, indicating that falling blossom rate increased as temperature decreased. Different growth temperatures did not affected on the level of symptom of calcium deficiency and Phytopathora blight. Falling blossom was severe at abnormally low temperature of 20℃, but the treatment of glutamine reduced falling blossom rate and increased the yield by 7.0% as compared to control. The optimum concentration of glutamine treatment was 10 mg/L for yields.
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KEYWORD
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Abnormally low temperatures, Calcium deficiency, Glutamine, Flower abscission, Growth temperature
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