Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Growth and Development of Watermelon Plants Grafted onto $Citrullus$ Rootstocks with Resistance to Fusarium Wilt at Two Temperature Regimes

덩굴쪼김병 저항성 대목용 수박 유전자원을 이용한 접목수박묘의 적온 및 저온하에서의 생장반응

  • Ko, Ho-Cheol (National Academy of Agricultural Science, RDA) ;
  • Lee, Woo-Moon (National Institute of Horticultural & Herbal Science, RDA) ;
  • Noh, Jae-Jong (Jeollabuk-do Agricultural Research & Extension Services) ;
  • Park, Kyoung-Sub (National Institute of Horticultural & Herbal Science, RDA) ;
  • Park, Dong-Kum (National Institute of Horticultural & Herbal Science, RDA) ;
  • Ko, Kwan-Dal (National Institute of Horticultural & Herbal Science, RDA) ;
  • Lee, Jung-Myung (Dept. of Horticulture, KyungHee University) ;
  • Huh, Yun-Chan (National Academy of Agricultural Science, RDA)
  • Received : 2011.09.15
  • Accepted : 2011.12.23
  • Published : 2012.03.31
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Abstract

Growth response of 'Sambokkul' watermelon grafted onto different rootstocks including 4 $Citrullus$ rootstocks and 3 other cucurbitaceous rootstocks was evaluated at two different temperature regimes. Significant reduction in plant growth rate was observed in plants grown at low temperatures (LT) as compared to those grown at normal or optimal temperatures. Relative growth reduction were 40~47% for vine length, 39~51% for total leaf area, 38~59% for shoot fresh weight, and 57~87% for plant dry weight, respectively. Watermelon rootstock PI 482322 showed comparable plant growth as the most popular rootstock 'Shintozwa' even at LT. 'Sambokkul' watermelon grafted onto watermelon hybrids, 'PI 271969 ${\times}$ PI 296341' and 'PI 271769 ${\times}$ Calhoun Gray', showed comparable plant growth as 'FR Dantos' bottle gourd rootstock. Index of growth ability at LT, which was calculated on the basis of reduced rate of vine length, dry weight and leaf area, was significantly high in $C.$ $martinezii$, 'Shintozwa', PI 482322, and 'PI 271769 ${\times}$ PI 296341' rootstocks (50% or higher) and low in own-rooted 'Sambokkul' or in watermelon plants on 'Knight' rootstock. Watermelon hybrids, 'PI 271969 ${\times}$ PI 296341' and 'PI 271769 ${\times}$ Calhoun Gray', showed better or at least comparable growth at low temperatures as compared to 'FR Dantos', confirming the feasibility of using watermelon rootstocks even in low temperature conditions.

덩굴쪼김병 저항성 수박 유전자원과 대목으로서 잠재력이 있는 박과작물의 수박 대목으로의 이용 가능성을 검토하기 위하여 수박대목 4계통을 포함한 7종류의 대목묘에 접목한 삼복꿀 수박을 저온조건과 적온조건의 하우스에서 재배하면서 그 생육 반응을 조사하였다. 저온에서의 생장정도는 적온에 비해 덩굴길이 40~47%, 엽면적 39~51%, 지상부 생체중 38~59%, 식물체 건물중 57~87% 수준이었다. 수박 유전자원인 PI 482322는 대목으로 이용했을 경우 저온에서 접수의 생장이 '신토좌' 대목과 유사할 정도로 좋았다. 또한 'PI 271769 ${\times}$ PI 296341'과 'PI 271769 ${\times}$ Calhoun Gray' 대목은 'FR 단토스' 대목구와 유사하였다. 저온신장성 지수는 $C.$ $martinezii$, '신토좌', PI 482322와 'PI 271769 ${\times}$ PI 296341'를 대목으로 이용한 처리에서 50 이상으로 비교적 높았으며, 무접목묘와 'Knight'에서 낮았다. 수박 대목으로 많이 이용하고 있는 'FR 단토스' 박 대목에 비해 PI 482322, 'PI 271769 ${\times}$ PI 296341', 'PI 271769 ${\times}$ Calhoun Gray' 대목은 저온신장성이 좋거나 유사한 것으로 나타나서 저온기재배에서 이들 수박 대목의 이용 가능성을 확인할 수 있었다.

Keywords

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