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NTIS 바로가기Korean journal of Soil Science and Fertilizer, v.46 no.1, 2013년, pp.32 - 39
The relationship between relative water contents of lettuce leaves and biochemical activities in lettuce was examined in this study to explore an adaptation response of lettuce to water stress from soils. Soil water contents and relative water contents of leaves were positively related to show
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핵심어 | 질문 | 논문에서 추출한 답변 |
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수분이 식물체 내에 미치는 영향은? | 식물체내 수분은 대사 및 생리과정에 직접 관여되어 수분이 조금만 감소하여도 생장과 발육에 큰 영향을 미치게 되며, 특히 잎 내의 상대함수량 (Relative Water Content)은 생육상태의 수분함량과 최대 함수량과의 비율로서 식물체 잎의 수분균형과 수분부족도를 나타내는 지표가 된다. 식물은 토양 내 수분의 함량이 감소하면 대사적으로나 생리적으로 이를 조절하는 기능을 가져야 하며, 이를 조절하지 못하면 심각한 손상을 얻게 된다 (Shigeoka et al. | |
아스코브산 과산화효소가 과산화수소를 물로 환원시키는 과정에서 하는 역할은? | 1] 등이며 각각 과산화수소를 환원시키는 일련의 과정에 관여하고 있다. 과산화수소를 물로 환원시키는 일련의 반응에서 APX는 특이적으로 아스코브산을 모노디하이드로아스코브산 (monodehydroascorbate: MDHA)으로 환원시키는 반응을 촉매하는 효소이며, MDHA 환원효소 (monodehydroascorbate reductase: MDHAR)는 아스코브산의 재생을 촉매하는 효소로서 식물체내의 아스코브산의 수준을 유지하는데 매우 중요한 역할을 한다 (Foyer and Halliwell, 1976; Foyer et al., 1983; Hossain and Asada, 1984; Shigeoka et al. | |
아스코브산이란 무엇인가? | 아스코브산 (ascorbic acid: vitamine C)은 식물에서 여러 가지 기능을 하는 물질로서 총 수용성 탄수화물의 약 10%정도를 차지하며 식물체내에서 생합성은 식물체의 발육과 환경요인에 의해 달라진다 (Smirnoff and Wheeeler, 2000). 아스코브산의 항산화제로서의 역할은 많은 관심을 집중시키고 있으며 많은 다른 주요 항산화효소의 보조효소로서의 역할도 많은 관심을 집중시키고 있다 (Conklin, 2001). |
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