Asynchronous DNA Replication of Sex-Chromatin in Interphase Nuclei of Male Sorrel Plant, Rumex acetosa
نویسندگان
چکیده
منابع مشابه
Asynchronous Dna Synthesis of Sex Chromatin in Human Interphase Nuclei
The sex chromatin body is an oval or round chromatin mass approximately 1 micron in diameter lying against the inner portion of the nuclear membrane. In human tissue it is present in about 20 to 40 per cent of female cells and is absent in male cells. The sex chromatin of somatic interphase nuclei is thought to be derived from a portion of a single heteropyknotic X chromosome (1, 2). Lima-de-Fa...
متن کاملCloning and characterization of dispersed repetitive DNA derived from microdissected sex chromosomes of Rumex acetosa.
Rumex acetosa is characterized by a multiple chromosome system (2n = 12 + XX for females, and 2n = 12 + XY1Y2 for males), in which sex is determined by the ratio between the number of X chromosomes and autosome sets. For a better understanding of the molecular structure and evolution of plant sex chromosomes, we have generated a sex chromosome specific library of R. acetosa by microdissection. ...
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The arrangement of chromatin within interphase nuclei seems to be caused by topological constraints and related to gene expression depending on tissue and developmental stage. In yeast and animals it was found that homologous and heterologous chromatin association are required to realize faithful expression and DNA repair. To test whether such associations are present in plants we analyzed Arab...
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synthetic sulphonated anthraquinones are the raw materials used for producing a large palette of synthetic dyes, and microorganisms have a limited ability to decompose them, hence they are one of the important environmental pollutants. in order to study the ability of plants to remove this pollutant from the environment, corn, as a plant not containing any natural anthraquinones and common sorr...
متن کاملContrasting Patterns of Transposable Element and Satellite Distribution on Sex Chromosomes (XY1Y2) in the Dioecious Plant Rumex acetosa
Rumex acetosa is a dioecious plant with the XY1Y2 sex chromosome system. Both Y chromosomes are heterochromatic and are thought to be degenerated. We performed low-pass 454 sequencing and similarity-based clustering of male and female genomic 454 reads to identify and characterize major groups of R. acetosa repetitive DNA. We found that Copia and Gypsy retrotransposons dominated, followed by DN...
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ژورنال
عنوان ژورنال: Shokubutsugaku Zasshi
سال: 1963
ISSN: 0006-808X
DOI: 10.15281/jplantres1887.76.199