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NTIS 바로가기농업과학연구 = CNU Journal of agricultural science, v.41 no.4, 2014년, pp.275 - 281
윤혜진 (국립농업과학원 토양비료과) , 성좌경 (국립농업과학원 토양비료과) , 이수연 (국립농업과학원 토양비료과) , 이예진 (국립농업과학원 토양비료과) , 하상건 (국립농업과학원 토양비료과) , 손연규 (국립농업과학원 토양비료과)
The ozone depletion has caused plants to be exposed to an increased penetration of solar ultraviolet-B (UV-B) radiation. Enhanced UV-B radiation may have influence on biological functions of plant in many aspects including inhibition of photosynthesis. It is evident that UV-B can potentially impair ...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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자외선은 파장에 따라 어떻게 나뉘는가? | 태양광선에는 자외선이 포함되어 있고, 그 이외에도 적외선과 가시광선을 포함하고 있다. 자외선은 파장에 따라 UV-A (320-400 nm), UV-B (280-320 nm), UV-C (200-280 nm) 및 vac uum UV (<200 nm)로 나누어진다. 태양광선의 자외선 영역 중 UV-A는 파장이 커서 오존층에 흡수되지 않고 직접 지상에 도달하지만, 파장이 짧은 UV-C는 오존이나 산소 등의 대기성분에 흡수되어 지상에 도달하지 못한다. | |
식물이 강한 UV-B를 받게 되면 어떻게 되는가? | 광인산화과정의 광계Ⅱ(photosystem Ⅱ)의 광합성 기구 중 틸라코이드 막이 UV-B에 가장 민감하고, Calvin 회로에서 CO2를 고정하는데 관여하는 Rubisco에 영향을 주어, Rubisco의 활성과 재생성을 저하시켜 식물의 광합성 능력을 저하시키는 것으로 알려져 있다(Kulandeivelu and Neudunchezhian, 1993). 강한 UV-B를 받게 되면, 직접적으로 식물의 광합성의 광계(photosystem)에 영향을 미치거나 간접적으로 광합성 색소와 엽면적을 줄여 광합성량이 감소된다. 이에 따라 대부분의 작물에서 광합성 색소와 광합성이 감소하게 되는데 이것은 생체량과 수량감소를 수반한다(Fig. | |
태양광선의 자외선 영역 중 UV-B의 특징은? | 태양광선의 자외선 영역 중 UV-A는 파장이 커서 오존층에 흡수되지 않고 직접 지상에 도달하지만, 파장이 짧은 UV-C는 오존이나 산소 등의 대기성분에 흡수되어 지상에 도달하지 못한다. 반면 UV-B는 주로 오존에 의해서만 흡수되고, 광·생물학적 효과가 커서 오존층이 파괴될 경우 지구생태계에 심각한 문제를 야기할 수 있다. |
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