Mursalimov Sergey, Sidorchuk Yuri, Demidov Dmitri, Meister Armin, Deineko Elena
Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, pr. Lavrentieva 10, Novosibirsk, 630090, Russia.
Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Corrensstraße 3, 06466, Stadt Seeland, Germany.
Protoplasma. 2016 Nov;253(6):1583-1588. doi: 10.1007/s00709-015-0907-1. Epub 2015 Nov 9.
The effect of plant ploidy level on the rate of cytomixis in microsporogenesis has been analyzed with the help of a unique model, the collection of tobacco plants of different ploidies (2n = 2x = 24, 4x = 48, 6x = 72, and 8x = 96). As has been shown, the rate of cytomixis proportionally increases in 6x and 8x cytotypes, being rather similar in 2x and 4x plants. The rate of cytomixis is highly variable, differing even in the genetically identical plants grown under the same conditions. The cytological pattern of cytomixis in the microsporogenesis of control 4x plants has been compared with the corresponding patterns of 2x, 6x, and 8x plants. Involvement of cytomixis in production of unreduced gametes and stabilization of the newly formed hybrid and polyploidy genomes is discussed.
借助一个独特的模型，即不同倍性（2n = 2x = 24、4x = 48、6x = 72和8x = 96）烟草植株的收集，分析了植物倍性水平对小孢子发生过程中细胞融合率的影响。结果表明，细胞融合率在6x和8x细胞型中按比例增加，在2x和4x植株中相当相似。细胞融合率高度可变，即使在相同条件下生长的基因相同的植株中也存在差异。已将对照4x植株小孢子发生过程中细胞融合的细胞学模式与2x、6x和8x植株的相应模式进行了比较。文中讨论了细胞融合在未减数配子产生以及新形成的杂种和多倍体基因组稳定中的作用。
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