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A TEM study on pre-excystment cellular structures of Euplotes encysticus 被引量:5
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作者 GUTUKANG JUNMEIXU 《Cell Research》 SCIE CAS CSCD 1995年第1期125-133,共9页
Right before the excystment of an Euplotes encysti-cus sawtooth-like folds appeared among the pellicle plas- malemma, the inner and outer alveolar membranes were still sticking together, and were not distinguishable. ... Right before the excystment of an Euplotes encysti-cus sawtooth-like folds appeared among the pellicle plas- malemma, the inner and outer alveolar membranes were still sticking together, and were not distinguishable. Mi- crotubular layers already formed at the sites beneath the dorsal cortical pellicle corresponding to vegetative cells,but they still proceed to be organized on the ventral struc-tures. Cristae, highly-tangled with tubular-type struc-tures, appeared on the mitochondria, and were morpho-logically similar to that of vegetative cells. In the cor-tical ciliatures, such as ciliary shafts, kinetosomes, sur-rounding fibrillar cirral baskets, and attached structures of ciliatures, etc., they are different from those in rest- ing cysts which are degenerated or lost. All the cilia- ture microtubules of ciliary shafts are of the 9+2 pattern,but the microtubule-like structure aggregates at triplet - microtubule centers of many kinetosmes, are still under various stages of differentiation. Microtubules beneath the kinetosomal rows are of a developmentally elongated stage; crowded chromatins of various shapes and sizes are found in macronucleus, but there are no nuclear pores (formed by nuclear membrane as in resting cysts) on the nuclear membrane where these chromatins attached. 展开更多
关键词 Euplotes encysticus EXCYSTMENT PELLICLE kinetosome MACRONUCLEUS
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Phylogenetic studies of four species of ciliate inferred from 16s-like small subunit rRNA gene sequences
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作者 LI Yi-song NIU Yan-ning LIU Lan-xia 《Journal of Forestry Research》 SCIE CAS CSCD 2008年第2期119-124,共6页
The phylogenetic relationships of four ciliate genera (Urostyla, Euplotes, Stylonychia and Pseudokeronopsis), which also are the important environment inspection species, were analyzed by the comparison of small sub... The phylogenetic relationships of four ciliate genera (Urostyla, Euplotes, Stylonychia and Pseudokeronopsis), which also are the important environment inspection species, were analyzed by the comparison of small subunit ribosomal RNA gene sequences. Euplotes appeared as an early branching group whose divergence from the hypotrichous line at a deep level was strongly supported by parsimony and matrix analyses. The analyses also supported the hypothesis that there were closely relationship between species in Urostyla and Holosticha. The sibling species Stylonychia mytilus and S. lemnae could be separated by the evolutionary analyses. Furthermore, Pseudokeronopsis rubra had relatively more closely relationship with the species in Holostichidae than that in Urostylidae based on the evolutionary distance value. 展开更多
关键词 Euplotes encysticus phylogenetic relationship Pseudokeronopsis rubra SS rRNA gene Stylonychia mytilus Urostyla grandis
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