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卤虫染色体倍性组成的研究 总被引:8,自引:1,他引:8
本文报道了我国4个地理品系卤虫的染色体倍性组成及卵径分布,分析了卤虫染色体的非整倍性,讨论了卤虫种的分布。 天津卤虫有2倍体(2n=42),占33.3%和5倍体,占16.2%;染色体数的波动为21—108;卵径为262±17μm。 海南卤虫有2倍体(2n=42),占8%;4倍体,占17.7%;5倍体,占18.3%;染色体数的波动为16—111;卵径为285±15μm。 新疆卤虫有2倍体(2n=42),占39.2%;染色体数的波动为17—106;卵径为269±15μm。 山西卤虫有2倍体(2n=42),占45.1%,染色体数的波动为17—84;卵径为234±13μm。 相似文献
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D. A. Sufieva O. V. Kirik O. S. Alekseeva D. E. Korzhevskii 《Journal of Evolutionary Biochemistry and Physiology》2016,52(6):490-498
Cytoskeletal intermediate filaments (IF) are composed of proteins able to form homo- and heterodimers, while their repertoire can change during cell differentiation. Data on the IF protein composition in tanycytes lining the mammalian third cerebral ventricle are still discrepant. The aim of this study was to investigate age-related changes in the IF protein composition in tanycytes of the third cerebral ventricle in Wistar rats at different ages (7-, 14-, and 30-day-old pups and 4–5-month-old adults; n = 26), using immunocytochemistry and confocal laser microscopy. In adult animals, tanycytes were shown to express IF proteins vimentin, GFAP, and nestin. In different types of tanycytes GFAP and nestin begin to be synthesized at different postnatal ages. For example, in α1 tanycytes GFAP is already present in 7-day-old animals, while in β1 tanycytes it appears only by day 30 of postnatal development. Meanwhile, vimentin is an essential IF component at all ages studied. A comparison of our data with the results obtained on other animal models suggests the existence of species-specific differences in the IF protein repertoire in tanycytes. 相似文献
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E. T. Zakharova A. V. Sokolov N. N. Pavlichenko V. A. Kostevich I. N. Abdurasulova A. V. Chechushkov I. V. Voynova A. Yu. Elizarova N. N. Kolmakov M. G. Bass I. V. Semak A. I. Budevich P. M. Kozhin N. K. Zenkov V. M. Klimenko O. V. Kirik D. E. Korzhevskii E. B. Menshchikova V. B. Vasilyev 《Biometals》2018,31(3):425-443
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Igor I. Brown Sergey I. Fadeyev Lyudmila M. Gerasimenko Irina I. Kirik Marina Ya. Pushenko Inna I. Severina 《Archives of microbiology》1990,153(4):409-411
The maximal growth rate of the marine cyanobacterium Oscillatoria brevis was reached at 200–400 mM NaCl and pH 9.0–9.6. NaCl was found (i) to stimulate the rate of the light-supported generation across the cytoplasmic membrane of the cells and (ii) to decrease the sensitivity of level and motility of the O. brevis trichomes to protonophorous uncouplers. The Na+/H+ antiporter, monensin, increased both and the uncoupler sensitivity of the cells. The data obtained agree with the assumption that O. brevis possesses a primary Na+ pump in its cytoplasmic membrane.Abbreviations ATP
adenosine-5-triphosphate
- TTFB
tetrachlortrifluoromethylimidazol
- CCCP
carbonyl cyanide m-chlorophenylhydrazone
- Na+
transmembrane electrochemical potential differences of Na+
-
transmembrane electric potential difference
- pNa
transmembrane pNa difference 相似文献