Biologia plantarum 55:493-498, 2011 | DOI: 10.1007/s10535-011-0115-6

Ultrastructure changes of seedlings of Kosteletzkya virginica under waterlogging conditions

J. Zhou1,2, S. W. Wan3, G. Li1, P. Qin1,*
1 Halophyte Research Laboratory of Nanjing University, Nanjing, P.R. China
2 Henan Institute of Science and Technology, Xinxiang, P.R. China
3 Department of Applied Mathematics, Nanjing University of Finance and Economics, Nanjing, P.R. China

The changes in ultrastructure of leaf cell in waterlogged Kosteletzkya virginica seedlings were observed by transmission electron microscope. During waterlogging, the chloroplasts turned into a round shape and their volume was gradually reduced. Furthermore, the lamellae of thylakoids swelled, and the inclusions in chloroplast decreased. The shape of starch grains slightly changed, but their number and volume decreased, and they even disappeared in the end. On the other hand, plastoglobules enlarged and their amount enhanced gradually. The membrane and inner cristea of mitochondria gradually became unclear, while the mitochondria firstly enlarged but disappeared at the end. Similar to chloroplast, cell nucleus dwindled gradually, concentrated and tended to a round shape. Additionally, the annulate lamellae and multivesicular body occurred on the 20th day of experiment, and the cell wall distorted and twisted at the late stage of waterlogging. Consequently, these changes of organelles are the typical characteristics of the complete cell disintegration or death for Kosteletzkya virginica under long-term waterlogging.

Keywords: chloroplast; halophyte; mitochondria; nucleus; plastoglobules; starch grains; thylakoids

Received: October 20, 2009; Accepted: March 8, 2010; Published: September 1, 2011Show citation

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Zhou, J., Wan, S.W., Li, G., & Qin, P. (2011). Ultrastructure changes of seedlings of Kosteletzkya virginica under waterlogging conditions. Biologia plantarum, 55(3), 493-498. doi: 10.1007/s10535-011-0115-6.
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