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KMID : 0368420050480020195
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Journal of Plant Biology
2005 Volume.48 No. 2 p.195 ~ p.200
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Ultrastructural changes of cell organelles in Arabidopsis stems after gamma irradation
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Wi Seung-Gon
Chung Byung-Yeoup
Kim Jin-Hong
Baek Myung-Hwa
Yang Dae-Hwa
Lee Ju-Woon
Kim Jae-Sung
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Abstract
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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.
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KEYWORD
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chloroplast, gamma irradiation, thylakoid, transmission electron microscopy, ultrastructure
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