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Ultrastructural changes of cell organelles in Arabidopsis stems after gamma irradation

한국식물학회지 2005년 48권 2호 p.195 ~ 200
위승곤, 정병엽, Kim Jin-Hong, Baek Myung-Hwa, 양대화, 이주운, Kim Jae-Sung,
소속 상세정보
위승곤 ( Wi Seung-Gon ) - Korea Atomic Energy Research Institute Division of Radiation Application Research
정병엽 ( Chung Byung-Yeoup ) - Korea Atomic Energy Research Institute Division of Radiation Application Research
 ( Kim Jin-Hong ) - Korea Atomic Energy Research Institute Division of Radiation Application Research
 ( Baek Myung-Hwa ) - Korea Atomic Energy Research Institute Division of Radiation Application Research
양대화 ( Yang Dae-Hwa ) - Korea Atomic Energy Research Institute Division of Radiation Application Research
이주운 ( Lee Ju-Woon ) - Korea Atomic Energy Research Institute Division of Radiation Application Research
 ( Kim Jae-Sung ) - Korea Atomic Energy Research Institute Division of Radiation Application Research

Abstract


We examined ultrastructural changes of the cell organelles ofArabidopsis stems in response to gamma irradiation. Seedlings treated with 0 to 5 Gy developed normally, while height growth in plants exposed to 50 Gy was significantly inhibited. Based on TEM observations, the chloroplasts were extremely sensitive to such irradiation. In particular, the thylakoids were heavily swollen, some portions of the mitochondria and endoplasmic reticulum were structurally altered, and the plasmalemma had pulled away from the cell wall in places. However, no ultrastructural changes in cell organelles occurred at doses of 0 to 5 Gy.

키워드

chloroplast; gamma irradiation; thylakoid; transmission electron microscopy; ultrastructure

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