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Hydrogen Peroxide 처리가 여름철 시설오이의 수분 스트레스, 광합성, 내서성에 미치는 영향 KCI 등재
The Influence of Hydrogen Peroxide Treatment on Water Stress, Photosynthesis and Thermotolerance of Cucumber(Cucumis sativus) in Greenhouse Cultivation during Summer
pp.47-52
This studies were carried out in summer season to increase high temperature tolerance using hydrogen peroxide treatments on cucumber in greenhouse. The water stress of cucumber in greenhouse by the hydrogen peroxide treatments showed as control〉250 mM〉500 mM treatments in order. The photosynthesis rate of cucumber at 30℃ did not show difference with each hydrogen peroxide treatment in temperature controlled greenhouse. However, the photosynthesis rate of cucumber in the control and hydrogen peroxide treatments at 40℃ was significantly different. The photosynthesis rate of cucumber in combined treatment with 1,000 mg·L-1 CO2 supply and hydrogen peroxide was also higher than control, however, there was no different of photosynthesis in 250 mM and 500 mM treatment. The value of Fv/Fm and Fm/Fo of chlorophyll fluorescent in 500 mM hydrogen peroxide treatment at 40℃ was highest. Also the activity of POD, the antioxidant enzyme, was higher with high hydrogen peroxide concentration than the other treatments. The high temperature limits for growth were 43℃ in the control, 44℃ in the 250 mM and 46℃ in the 500 mM according to analyze chlorophyll fluorescent Fo. The high temperature tolerance in cucumber increased approximately 3℃ by the hydrogen peroxide treatments under this experiment conditions.
