Pattern of the plastid division in spore mother cells of the hornwortAnthoceros punctatus |
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Authors: | Yoshihiro Izumi Kanji Ono |
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Institution: | (1) Department of Biological Science, Faculty of Science, Kumamoto University, 860 Kumamoto, Japan |
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Abstract: | Relative changes in plastid DNA content in each stage of plastid division were investigated in order to better understand
the division cycle of plastids in spore mother cells in the horwortAnthoceros punctatus. Samples of cells stained with DAPI were observed with epifluorescence microscopy and CHIAS. In spore mother cells of this
species, plastids duplicated their own DNA prior to the plastidkinesis of the first plastid division, but did not replicate
plastid DNA prior to the plastidkinesis of the second plastid division. Therefore, the DNA content of those plastids in which
division had been completed was reduced to half its initial value. This indicates that the DNA replication pattern of plastids
in spore mother cells corresponds to that of cell nuclei during premeiosis and meiosis inA. punctatus. |
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Keywords: | Anthoceros punctatus Chloroplast division DNA content Hornwort Melosis Plastid division Spore mother cell |
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