[논문]콩의 광질에 대한 엽 색소 및 엽록소 형광반응 연구

박세준; 김도연; 유성녕; 김현희; 고태석; 심명룡; 박소현; 양지아; 엄기철; 홍선희; 김태완

콩의 광질에 대한 엽 색소 및 엽록소 형광반응 연구
Response of Leaf Pigment and Chlorophyll Fluorescence to Light Quality in Soybean (Glycine max Merr. var Seoritae) 원문보기

韓國土壤肥料學會誌 = Korean journal of soil science & fertilizer, v.43 no.3, 2010년, pp.400 - 406

초록
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서리태콩 (Glycine max Merr. var Seoritae)에서 광원에 따른 엽의 광합성 변화를 구명하기 위하여 콩의 제 1복엽이 완전 전개되었을 때 3일 동안 빛을 차단한 후 UV-B 와 일반광에 노출시켜 색소 함량과 엽록소 형광반응의 변화를 측정하였다. 암처리에서 엽록소 함량은 감소하고, 일반 광에서 회복하였다. 카로티노이드와 안토시아닌 함량은 UV-B 조사한 처리구에서 증가하였다. 엽록소 형광분석을 이용한 광합성 능률을 분석한 결과, 암처리가 진행 됨에 따라 Fv/Fm, F'v/F'm, ${\Phi}_{PSII}$ 및 NPQ는 감소하였다. 모든 변수들은 일반광에 노출되면서 회복하였으나 UV 처리한 것은 암처리 72시간의 수치와 큰 변화가 없었다. 이를 통하여 암처리 48시간 경과함으로 엽록체가 에티오플라스트로 전환되며, 일반광을 조사하였을 시 광합성 관련 광계가 복구되지만, UV-B의 강한 광이 조사되었을 때 광계가 회복되지 못하는 것으로 사료되었다.

Abstract ▼ AI-Helper

Etiolation of plant leaves evoke to be photosynthetically inactive because plant leaves are unable to convert photochlorophyllide to chlorophyllide in the absence of light. In addition, UV-B radiation plays an important role in photomorphogenesis and excessive UV-B radiation decreases photosynthesis and causes to damage to cellular DNA. In the present study, two electrical lights obtained with the ultraviolet lamp and moderate lamp were employed to young plants soybean (Glycine max Merr. var Seoritae). After treatment of different lights, young plants were harvested for the determination of pigment contents and chlorophyll fluorescence. The contents of carotenoids and anthocyanins were significantly enhanced with the excessive UV-B radiation. Excessive UV-B light reduced dramatically photosynthetic efficiency causing an irreversible damage on PSII in comparison to the controls treated under normal illumination. As the treatment of normal illumination after dark treatment, the contents of carotenoids and anthocyanains were not changed in the leaves and photosynthetic ability were retained. Therefore, Seoritae soybean leaves might protect themselves from excessive UV-B radiation with up-regulation of antioxidants.

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문제 정의

The goal of this study is to examine etioplatid and chloroplastid transformation in relation to different light sources in soybean seedlings. As they are transformed, changes of carotenoid and anthocyanin contents, content and ratios of chlorophylls, and fluorescence parameters are determined in relation to light sources including UV-B stress.

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