한국작물학회지 (KOREAN JOURNAL OF CROP SCIENCE)

  • 제65권2호
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  • Pages.113-123
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  • 2020
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  • 0252-9777(pISSN)
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  • 2287-8432(eISSN)
한국작물학회 (The Korean Society of Crop Science)
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과산화수소 엽면 처리에 의한 수수에서 한발 스트레스 완화 효과

Mitigation Effects of Foliar-Applied Hydrogen Peroxide on Drought Stress in Sorghum bicolor

  • Shim, Doo-Do (Institute of Hadong Green Tea) ;
  • Lee, Seung-Ha (Department of Agronomy, Gyeongsang National University) ;
  • Chung, Jong-Il (Department of Agronomy, Gyeongsang National University) ;
  • Kim, Min Chul (Department of Agronomy, Gyeongsang National University) ;
  • Chung, Jung-Sung (Department of Agronomy, Gyeongsang National University) ;
  • Lee, Yeong-Hun (Department of Agronomy, Gyeongsang National University) ;
  • Jeon, Seung-Ho (Department, Sunchon National University) ;
  • Song, Gi-Eun (Department of Applied Biological Science, Applied Biology (BK Plus), Gyeongsang National University) ;
  • Shim, Sang-In (Department of Agronomy, Gyeongsang National University)
  • 투고 : 2020.03.17
  • 심사 : 2020.05.11
  • 발행 : 2020.06.01
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문은 과산화수소 엽면 처리를 통해 수수에서 한발 스트레스 완화 효과가 있는지 알아보기 위하여 과산화수소 처리에 따른 생육 및 생리적 특성 변화와 단백질 변화를 분석하였다. 1. 포장 실험에서 한발 스트레스는 수수 생장을 감소시켰으나, 과산화수소 처리구에서는 과산화수소 무처리구보다 생육이 우수하였다. 또한 한발 조건에서 과산화수소 처리는 무처리에 비해 수량 관련 형질들의저하를 막는 효과를 보였다. 2. 엽 녹색도(SPAD) 및 엽록소 형광(Fv/Fm), 광합성 형질 조사에서 과산화수소 처리가 과산화수소 무처리보다 높았고, 포장 실험에서 엽내 과산화수소 함량은 적습+H2O2 처리가 적습+H2O 처리보다 과산화수소 함량이 227.8 µmol·g-1 높았고, 한발 조건에서 엽내 과산화수소 함량은 한발+H2O2 처리가 한발+H2O 처리보다 16.7 µmol·g-1으로 낮았다. 3. 한발 조건에서 과산화수소 처리는 여러 단백질의 발현을 변화시켰으며, 특히 광합성 관련 단백질인 ATP synthase deltal chain, cytochrome b6-f complex iron-sulfur subunit, ATP synthase subunit gamma, putative uncharacterized protein Sb02g002690, Sb07g027500와 Superoxide 라디칼을 제거해주는 superoxide dismutase가 증가한 것을 확인하였다. 그리고 단백질 보호와 복원에 관련된 heat shock protein의 발현 증가도 확인되었다. 종합적으로 과산화수소 엽면 처리가 한발 하에서 광합성 관련 단백질의 발현을 증가와 기공 개도를 높여 광합성 능력을 향상시켰다. 특히 엽내에 축적될 수 있는 활성산소종을 제거하는 항산화 능력이 높아져 한발 스트레스 대한 내성을 높여 수수의 생육과 수량성 저하가 억제되는 것을 확인할 수 있었다.

Global climatic change and increasing climatic instability threaten crop productivity. Due to climatic change, drought stress is occurring more frequently in crop fields. In this study, we investigated the effect of treatment with hydrogen peroxide (H2O2) before leaf development on the growth and yield of sorghum for minimizing the damage of crops to drought. To assess the effect of H2O2 on the growth of sorghum plant, 10 mM H2O2 was used to treat sorghum leaves at the 3-leaf stage during growth in field conditions. Plant height, stem diameter, leaf length, and leaf width were increased by 7.6%, 9.6%, 8.3% and 11.5%, respectively. SPAD value, chlorophyll fluorescence (Fv/Fm), photosynthetic rate, stomatal conductance, and transpiration rate were increased by 3.0%, 4.9%, 26.0%, 23.4% and 12.7%, respectively. The amount of H2O2 in the leaf tissue of sorghum plant treated with 10 mM H2O2 was 0.7% of the applied amount after 1 hour. The level increased to approximately 1.0% after 6 hours. The highest antioxidant activity measured by the Oxygen Radical Absorbance Capacity assay was 847.3 µmol·g-1 at 6 hour after treatment. However, in the well-watered condition, the concentration of H2O2 in the plant treated by the foliar application of H2O2 was 227.8 µmol·g-1 higher than that of the untreated control. H2O2 treatment improved all the yield components and yield-related factors. Panicle length, plant dry weight, panicle weight, seed weight per plant, seed weight per unit area, and thousand seed weight were increased by 8.8%, 18.0%, 24.4%, 24.7%, 29.9% and 7.1%, respectively. Proteomic analysis showed that H2O2 treatment in sorghum increased the tolerance to drought stress and maintained growth and yield by ameliorating oxidative stress.

키워드

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