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The Influence of Abnormally Low Temperatures on Growth and Yield of Hot Pepper(Capsicum Annum L.)

이상저온 조건이 고추의 생육 및 수량에 미치는 영향

  • Park, Eun-Ji (Department of Horticultural Bioscience, Pusan National University) ;
  • Heo, You (Department of Horticultural Bioscience, Pusan National University) ;
  • Son, Beung-Gu (Department of Horticultural Bioscience, Pusan National University) ;
  • Choi, Young-Whan (Department of Horticultural Bioscience, Pusan National University) ;
  • Lee, Yong-Jae (Department of Horticultural Bioscience, Pusan National University) ;
  • Park, Young-Hoon (Department of Horticultural Bioscience, Pusan National University) ;
  • Suh, Jeong-Min (Department of Bio-Environmental Energy, Pusan National University) ;
  • Cho, Jae-Hwan (Department of Agricultural Economics, Pusan National University) ;
  • Hong, Chang-Oh (Department of Life Science and Environmental Biochemistry, Pusan National University) ;
  • Lee, Sang-Gye (Vegetable Research Division, National Institute of Horticultural and Herbal Sciences) ;
  • Kang, Jum-Soon (Department of Horticultural Bioscience, Pusan National University)
  • 박은지 (부산대학교 원예생명과학과) ;
  • 허유 (부산대학교 원예생명과학과) ;
  • 손병구 (부산대학교 원예생명과학과) ;
  • 최영환 (부산대학교 원예생명과학과) ;
  • 이용재 (부산대학교 원예생명과학과) ;
  • 박영훈 (부산대학교 원예생명과학과) ;
  • 서정민 (부산대학교 바이오환경에너지학과) ;
  • 조재환 (부산대학교 농업경제학과) ;
  • 홍창오 (부산대학교 생명환경화학과) ;
  • 이상규 (농촌진흥청 국립원예특작과학원 채소과) ;
  • 강점순 (부산대학교 원예생명과학과)
  • Received : 2013.11.20
  • Accepted : 2014.02.17
  • Published : 2014.05.30

Abstract

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 $25^{\circ}C$, and the suppression level was the highest for plants grown for 90 days at $20^{\circ}C$. However, root growth was not affected by the different temperatures. The number of leaf and leaf area decreased at the temperatures below $25^{\circ}C$, an optimum temperature for growth. Fresh weight and dry weight decreased for plants grown at $20^{\circ}C$. Pepper fruit yield also decreased by 11% at $20^{\circ}C$ in comparison to $25^{\circ}C$. Falling blossom rate was different depending on the growth temperature, and the rate was 27.2% at $25^{\circ}C$, 35.2% at $22.5^{\circ}C$, and 41.0% at $20^{\circ}C$, 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 $20^{\circ}C$, 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.

Keywords

Abnormally low temperatures;Calcium deficiency;Glutamine;Flower abscission;Growth temperature

Acknowledgement

Supported by : 농촌진흥청

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