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http://dx.doi.org/10.5352/JLS.2009.19.8.1016

Ultrastructural Study of Programmed Cell Death of Tapetum In Panax ginseng  

Jeong, Byung-Kap (Department of Biological Sciences, Kosin University)
Publication Information
Journal of Life Science / v.19, no.8, 2009 , pp. 1016-1022 More about this Journal
Abstract
Tapetum is the tissue in which nutrients are supplied to the developing microspore in angiosperm anther. At tetrad stage of microspore, the tapetal cells show maximum development, but they began to be degenerated by apoptotic programmed cell death (PCD) after sporopollenin accumulation in the pollen wall. The initial step of PCD was observed as vacuolar fusion. After that, cytoplasmic condensation and nuclear fragmentation followed. Lipid droplets are degenerated at a relatively late stage of PCD, and orbicular bodies are the last remains in tapetal cells. The cell wall was relatively resistant against vacuolar enzymes in tapetal cells; it was considered the last structure remaining during programmed cell death of tapetum in ginseng anther.
Keywords
Tapetum; programmed cell death; ultrastructural study; cytoplasmic condensation; nuclear fragmentation;
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