한국농림기상학회지, 제 5권 제1호(2003) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 5, No. 1, (2003), pp. 18~23
ⓒ Author(s) 2014. CC Attribution 3.0 License.


SO2에 노출된 4개 수종의 엽내 광색소 합량 및 SOD 활성 변화

이재천(1), 한심희(1), 권기원(2), 우수영(3), 최정호(2)
(1)임업연구원, (2)충남대학교 산림자원학과, (3)서울시립대 환경원예학과

(2003년 01월 04일 접수; 2003년 02월 27일 수락)

Changes of Photosynthetic Pigment Contents and SOD Activity in
the Leaves of Four Tree Species Exposed to SO2

Jae-Cheon Lee(1), Sim-Hee Han(1), Ki-Won Kwon(2), Su-Young Woo(3), Jeong-Ho Choi(2)
(1)Dept. of Forest Genetic Resources, Korea Forest Research Institute, Suwon 441-350, Korea
(2)Dept. of Forest Resources, Chungnam Nat’l Univ., Daejeon 305-764, Korea
(3)Dept. of Environmental Horticulture, The University of Seoul, Seoul 130-743, Korea

(Received January 04, 2003; Accepted February 27, 2003)

ABSTRACT
This study was conducted to compare physiological responses of Pinus densiflora, Populus×tomentiglandulosa, Quercus acutissima and Eleutherococcus sessiliflorus exposed to SO2, by measuring photosynthetic pigment contents and SOD activity. Four woody plants were exposed to relatively high SO2 concentration (500 ppb, 800 ppb) for 8h day-1 for 7 days in a chamber. Photosynthetic pigment contents in the leaves of four species decreased with increase of SO2 concentration; also chlorophyll a, chlorophyll b and total carotenoid content were significantly different among tree species and treatments. The ratio of chlorophyll b to chlorophyll a of E. sessiliflorus and Q. acutissima increased for 500 ppb treatment but decreased at 800 ppb. This result showed that chlorophyll a was destroyed by 500 ppb SO2 and chlorophyll b by 800 ppb SO2. Therefore, the sensitivity of chlorophyll a to SO2 may be higher than that of chlorophyll b. SOD activity differed significantly between species and treatments. SOD activity of E. sessiliflorus and Q. acutissima increased at 500 ppb but decreased at 800 ppb, but P. densiflora and P.×tomentiglandulosa maintained high SOD activity at both 500 ppb and 800 ppb. Based on the photosynthetic pigment contents and SOD activity in the leaves of four tree species, the tolerance of P.×tomentiglandulosa to SO2 was the highest of four tree species.

Keyword: , photosynthetic pigment, chlorophyll, carotenoids, SOD, resistance

MAIN

적요

목본 식물을 대상으로 SO2에 의해 나타나는 생리적인 반응을 구명하기 위하여 소나무, 오갈피나무, 현사시, 상수리나무를 대상으로 SO2를 500 ppb, 800 ppb 로 하루에 8시간썩 7일간 처리하여 잎의 광색소 함량과 SOD 활성을 비교 분석한 결과는 다음과 같았다.
SO2의 처리 농도가 증가할수록 4개 수목의 엽 내 엽록소 함량은 감소하였으며, 엽록소 a와 엽록소 b, 카로티노이드 함량의 변화는 수종별, 처리별로 다른 경호을 보였다. 오갈피나무와 상수리나무의 엽록소 b와 a의 비는 SO2는 500 ppb 처리구에서는 증가하다 가 800 ppb 처리구에서는 감소하였다. 즉 500 ppb 에 서는 엽록소 a가 파괴되며, 800 ppb 에서는 엽록소 b도 파괴될 수 있음을 보여 주었으며, SO2에 대한 민감성은 엽록소 a가 엽록소 b보다 높은 것으로 나타났다. 4개 수종의 잎 SOD 활성은 수종별, 처리별 큰 차이를 나타냈다. 오갈피나무와 상수리나무는 500 ppb 처리구에서는 SOD 활성이 증가하다가 더 높은 농도에서는 활성이 감소하였으며, 소나무와 현사시의 경우 는 500 ppb 처리와 800 ppb 처리에서 높은 SOD 활성을 유지하여 내성을 보인다. 그러나 광색소와 SOD 활성을 기준으로 판단해 볼 때, SO2에 대한 저항성은 현사시가 가장 높은 것으로 판단된다.

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