Journal of Ecology and Rural Environment ›› 2002, Vol. 18 ›› Issue (1): 26-30.doi:
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JIE Kai-Bin, SHI Guo-Xin, CHEN Guo-Xiang, LIU Shuang, JIANG Yong
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Abstract: Effects of Hg 2+ ,varied with concentration,on electron transport activity of photosystem,absorption spectrum,fluorescence emission spectrum at room temperature,polypeptide compositions and ultrastructure of thylakoid membrane of Nuphar pumilum DC.were studied. Hg 2+ inhibited the electron transport activity of PSⅠ and PSⅡ and the effect was stronger on PSⅠ than on PSⅡ.For the Hg 2+ treatment,its absorption peaks were at 430 nm and 680 nm and its fluorescence peak,too,at 685 nm,but the Hg 2+ treatment did not affect its polypeptide composition.Treatment with 10 mmol·L -1 Hg 2+ caused thylakoid swell and stroma reduce in chloroplast.With the time of the treatment extending,thylakoid swelled further and eventually decomposed. As a consequence, stroma further reduced as well.
Key words: Hg 2+, Nuphar pumilum DC., thylakoid membrane, electron transport activity, polypeptide compositions, ultrastructure
CLC Number:
X503
JIE Kai-Bin, SHI Guo-Xin, CHEN Guo-Xiang, LIU Shuang, JIANG Yong. Effects of Hg2+ on Ultrastructure and Function of Photosynthetic Membrane of Nuphar pumilum DC[J]. Journal of Ecology and Rural Environment, 2002, 18(1): 26-30.
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