THE COMPLEX ORGANIZATION OF EUKARYOTIC CELL NUCLEUS (III): THE NUCLEAR MATRIX AND THE NUCLEAR LAMINA

A large variety of nuclear fibrous proteins (such as actin, myosin, lamin B, transcription factors, topoisomerases, etc) represent constitutive elements of complex structures present in the eukaryotic nuclei: the nuclear matrix and the nuclear lamina, repectively. These nuclear compartments, with fibrous network-like structure, play crucial roles in structural organization of nuclei, chromatin remodeling, DNA transcription, signals transduction, cell cycle regulation, embryonic development and other nuclear basic processes

THE COMPLEX ORGANIZATION OF EUKARYOTIC CELL NUCLEUS (II): CHROMOSOME TERRITORIES AND THE INTERCHROMATIN DOMAINS

chromosomes territories (CTs), interchromatin network model (ICN), insulator elements, interchromatin (interchromosomal) compartment (IC

THE COMPLEX ORGANIZATION OF EUKARYOTIC CELL NUCLEUS (IV): THE NUCLEAR ENVELOPE

The nuclear envelope (NE), a double membrane structure, separates the nucleoplasm from cytosol. Each of the two membranes of the NE (the inner nuclear membrane, INM and the outer nuclear membrane, ONM) contain a particular protein complement, with specific domains, which accomplish various and critical functions: the lamin and chromatin anchoring at NE, the localization and movement of nucleus within cells, the control of transciption, etc. The nuclear pores complexes (NPCs) of the NE are large and complicated proteic structures, essentially involved in bidirectional transport of molecules between nucleus and cytoplasm. Some nuclear envelope molecular components are subjected to various genetic disorders known as envelopathies, which result in general syndroms, more or less severe

THE COMPLEX ORGANIZATION OF EUKARYOTIC CELL NUCLEUS (II): CHROMOSOME TERRITORIES AND THE INTERCHROMATIN DOMAINS

chromosomes territories (CTs), interchromatin network model (ICN), insulator elements, interchromatin (interchromosomal) compartment (IC

Electromagnetic radiation influence on some physiological and cytogenetic parameters in Secale cereale L

Microwave action on plant organisms it is of interest to specialists because of their influence on the activity of DNA from the cell nucleus, especially on the conformational aspects of the genome. Due to the application of microwave treatments were obtained valuable varieties of plants (particularly food such as cereals) with superior productive features, adequate to human needs. The aim of our research has been highlighting the impact of microwaves on cellular and genome dynamics in meristems from irradiated seeds. Our investigations establish the stimulatory effects of microwave treatments on mitosis (mitotic index values compared to the control) and also detect disturbances in the mitosis process, and at the chromosomal level, disturbances that typically occur after treatment with various chemical agent

KARYOTYPE ANALYSIS IN PHASEOLUS VULGARIS L. CULTIVARS

Chromosome’s number were 2n=22 on all Phaseolus cultivars. All chromosomes were found morphological uniform, without satellites, and submetacentrics

THE INFLUENCE OF HEXANITROGENCOBALTIAT III OF SODIU ON MITOTIC DIVISION AT ALLIUM CEPA L.

The paper presents the influence of hexanitrogen-cobaltiat III of sodiu upon the mitotic division of Allium cepa L. The treatment with hexanitrogen-cobaltiat III of sodiu has determined the lessening of the mitotic index and the chromosomial mutations.The experiment prowed that hexanitrogen-cobaltiat III of sodiu, known as a polluting agent has a mutagenic potential on the plants

PRELIMINARY KARYOTYPE ANALYSIS IN MEMBERS OF ASTERACEAE FAMILY

: chromosome’s number were 2n=18 on Callistephus chinensis (China aster) and 2n=36 on Rudbeckia hirta (blackeyed susan). Until in Callistephus chinensis the chromosomes were found uniforms as dimension and morphology, in Rudbeckia hirta there are three morphological type