CAP STRUCTURE AND ITS PHYLOGENETIC SIGNIFICANCE IN OEDOGONIALES, CHLOROPHYTA
会议名称：《中国藻类学会第十一次学术讨论会》
会议日期：2001年
学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学]
关 键 词：apical cap formation Qedogonium Oedocladium Oedogoniales Chlorophyta SEM TEM terminal cell division intercalary cell division
摘 要：正 Thalli of Oedogonium bia Liu et Hu and Oedocladiutn prescottii Islam collected from terrestrial places have been cultivated for more than two year in the laboratory of Institute of Hydrobiology at Wuhan in China. In both species of the terminal cell division produced the apical cap attaching laterally to a septum between terminal cell and sub-terminal cell in a filament observed under the light microscope and electronic microscope. It was easier to find the attaching apical caps in filaments from culture material than from field material. It was the first record of the apical cap structure in genus Oedogonium. Several new observations were recorded in both species. The main differences between terminal cell division and intercalary division had been studied in Oedogoniales. The sub-terminal cell, coming from the terminal cell, with apical cap could not divide again, but one intercalary cell could divide a few times, resulting as a series of rings on its cell wall. Thallus of Oedogonium bia was an un-branched filaments with intercalary division, simultaneously the cell grown mainly by the terminal cell division, which also occurred in Oedocladiurn,. Maybe Oedogonium bia was considered to be an evolutionary middle representative between Oedogonium and Oedocladium.