Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
권호 표지

Determination of Salt Type, Salt Concentration, and Salt Application Method and Timing for Suppression of Stem Elongation in Grafted Cucumber Seedlings

오이 접목묘의 도장억제를 위한 염 스트레스 처리 효과

  • Moon, Ji-Hye (National Institute of Horticultural and Herbal Science, RDA) ;
  • Jang, Yoon-Ah (National Institute of Horticultural and Herbal Science, RDA) ;
  • Yun, Hyung-Kweon (National Institute of Horticultural and Herbal Science, RDA) ;
  • Lee, Sang-Gyu (National Institute of Horticultural and Herbal Science, RDA) ;
  • Lee, Ji-Weon (National Institute of Horticultural and Herbal Science, RDA)
  • 문지혜 (농촌진흥청 국립원예특작과학원) ;
  • 장윤아 (농촌진흥청 국립원예특작과학원) ;
  • 윤형권 (농촌진흥청 국립원예특작과학원) ;
  • 이상규 (농촌진흥청 국립원예특작과학원) ;
  • 이지원 (농촌진흥청 국립원예특작과학원)
  • Received : 2010.10.08
  • Accepted : 2010.10.20
  • Published : 2010.12.31
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Abstract

This study aimed to examine a suppression effect of salinity on extension rate of stem elongation of cucumber seedlings (Cucumis sativus L.) grafted with roots of figleaf gourd plant. The effects of application methods, timings, and concentrations of two salt types, sodium chloride (NaCl) and calcium chloride ($CaCl_2$), were compared to untreated control plants. In result, an obvious suppression effect on the excessive elongation of stem was obtained by both sub-irrigated and medium-mixed NaCl salt. An improvement in quality of transplants was also obtained by the sub-irrigated NaCl salt. Foliar-applied NaCl caused visible leaf injury when the concentration was higher than 40 mM; but, with no effect on suppressing the stem elongation. When the NaCl was applied at 7 days after grafting, a higher concentration of NaCl was demanded for suppressing the stem elongation compared to an application at the day of grafting. No effect of the NaCl salt on the fresh weights of 36-day grown plants was observed; but, there was a negative effect on the number of female flowers at a high temperature season. Overall, the NaCl salt was more effective on slowing down the stem elongation and had the lower incidence of leaf injury than the $CaCl_2$ salt.

본 연구는 염화나트륨과 염화칼슘 처리가 오이(Cucumis sativus L.) 접목묘의 도장억제에 미치는 영향을 살펴보고자 수행되었다. 오이 접목 후 염류의 처리 방법, 처리 시기 및 처리 농도를 diniconazole 처리구 및 무처리구와 비교하였다. NaCl을 저면관수나 상토에 혼입하여 처리한 경우 과도한 줄기신장이 억제되는 효과가 있었으며 묘의 충실도 또한 증가되었다. 하지만, 염화나트륨을 두상관수 처리할 경우에는 40mM 이상 농도부터 잎에 피해 증상을 나타낸 반면 도장억제 효과는 거의 없었다. 염화나트륨 처리시기를 접목 7일 후로 할 경우 접목 시에 처리하는 것 보다 도장 억제를 위해 더 높은 농도의 염화나트륨을 필요로 하였다. NaCl 처리 접목모종의 생육을 정식 후 36일에 조사한 결과, 대조구 대비 생체중의 변화는 없었으나 고온기 암꽃 수가 감소하는 경향을 보여 위험 부담이 따랐다. 전체적으로, 염화나트륨이 염화칼슘 처리보다 줄기 신장 억제에 더 효과적이었으며 잎에 나타나는 피해 증상도 적었다.

Keywords

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