Accessory chromosomes in norwegian populations of Paris quadrifolia L.
نویسندگان
چکیده
منابع مشابه
Chemical composition and biological activity of Paris quadrifolia L.
A study of the components of Paris quadrifolia was undertaken to identify compounds with potential influence on cardiac cells, since previous reports suggested a cardiotoxic risk of this plant. Compounds isolated and identified included one new steroidal saponin, (23S,24S)-spirosta-5,25(27)-diene-1beta,3beta,21,23,24-pentol-1-O-beta-D-apiofuranosyl-(1-->3)-alpha-L-rhamnopyranosyl-(1-->2)-[beta-...
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Pennogenyl saponins are the active compounds of large number of plant species and consequently many polyherbal formulations. Hence, great interest has been shown in their characterization and in the investigation of their pharmacological and biological properties, especially anticancer. This present study reports on the evaluation of cytotoxic effects and explanation of the molecular mechanisms...
متن کاملAbscisic acid regulation of heterophylly in Marsilea quadrifolia L.: effects of R-(-) and S-(+) isomers.
The plant hormone abscisic acid (ABA) induces a developmental switch in the aquatic fern Marsilea quadrifolia, causing the formation of aerial type characteristics, including the elongation of petioles and roots, a change in leaf morphology, the expansion of leaf surface area, and the shortening of the internodes. A number of ABA-responsive heterophylly (ABRH) genes are induced early during the...
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Cytological analysis of microsporogenesis in 72 popcorn plants, comprising nine from the original population (CMS-43, S(0)) and 63 from seven cycles of self-fertilization (S(1) to S(7)), one plant of S(0) generation (plant 2) was identified with B chromosomes. The number of B chromosomes varied from two to three in the same anther. The pattern of chromosome pairing and meiotic behavior of Bs we...
متن کاملThe frequency distribution of lethal chromosomes in finite populations.
The statistical techniques for studying the population dynamics of recessive lethal genes were developed mainly by Wright,'-' who studied the distribution of gene frequencies in populations. In reality, however, the frequencies of individual lethal genes cannot be observed but the frequency of lethal-bearing chromosomes is determined. In large populations the random fluctuation of the frequency...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 1982
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.47.391