Korean Journal of Environmental Agriculture (한국환경농학회지)
- Volume 13 Issue 2
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- Pages.183-190
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- 1994
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- 1225-3537(pISSN)
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- 2233-4173(eISSN)
Stress Effects on Photosynthesis of Greenhouse Plants as Measured by the Fluorescence Method
형광분석법에 의한 시설재배작물의 광합성 Stress 측정
- U, Zang-Kual (Dept. of Agricultural Chemistry, Cheju National University) ;
- Song, Sung-Jung (Cheju Applied Radioisotope Research Institute, Cheju National University) ;
- Hansen, Ute (Research Institute for Biophysics, Hannover University)
- Published : 1994.08.30
Abstract
To assess the effects of plant stress by light, temperature, NaCl and soil moisture on photosynthetic activity, the fluorescence method was used for Chinese cabbage(Brassica perkinensis Rupr.), strawberry(Fragaria grandiflora Ehrh.) and citrus tree(Citrus unshiu Marc.). With decreasing the light intensity, Fv/Fm ratios of intact leaves of Chinese cabbage and strawberry increased significantly, indicating lower photochemical efficiency in PS II system, resulting in an inverse relationship with the photosynthetic activity. Chinese cabbage and strawberry that were grown at higher temperature had higher Fv/Fm ratios and photosynthetic activities, while those given high concentration of NaCl and having low soil moisture had lower values. Chinese cabbage more resistant to salt stress and requiring more water had a greater Fv/Fm ratio than strawberry. In citrus tree, Fv/Fm ratio was lower in the non-irrigated group than the irrigated one. From these results, the fluorescence method was found to be a useful tool which can be used to assess the degree of in vivo stress induced by various environmental factors.
작물의 광합성 상태를 신속, 정확하게 알아내는 것은 농업생산력 향상은 물론 각종 환경요인에 의해서 작물이 받게 되는 stress 평가를 하기 위해 중요한 일이므로, 형광분석법을 시설재배작물의 광합성 상태 측정에 이용하고자 배추와 딸기를 식물 재료로 하여 비닐하우스의 재배 환경 요인으로 작용하는 인자(광도, 온도, NaCl 농도, 토양수분)들이 엽록소형광에 미치는 영향을 조사하였다. 광도가 낮아짐에 따라 배추와 딸기의 Fv/Fm 비가 증가되었는데, 이는 광도가 낮아짐에 따라 PS II 반응센터의 광에너지 전환효율이 낮았기 때문이라고 생각된다. 특히, Fv/Fm 비가
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