Effects of aluminum on nucleoli in root tip cells and selected physiological and biochemical characters in Allium cepa var. agrogarum L
- The perichromatin region of the plant cell nucleus is the area with the strongest co-localisation of snRNA and SR proteins. Niedojadło, Janusz; Mikulski, Zbigniew; Dełeńko, Konrad; Szmidt-Jaworska, Adriana; Smoliński, Dariusz; Epstein, Alan // Planta;Aug2012, Vol. 236 Issue 2, p715
The spatial organisation of the splicing system in plant cells containing either reticular ( Allium cepa) or chromocentric ( Lupinus luteus) nuclei was studied by immunolabelling of SR proteins, snRNA, and the PANA antigen, known markers for interchromatin granule clusters in mammalian cells....
- Nucleolus: the fascinating nuclear body. Sirri, Valentina; Urcuqui-Inchima, Silvio; Roussel, Pascal; Hernandez-Verdun, Danièle // Histochemistry & Cell Biology;Jan2008, Vol. 129 Issue 1, p13
Nucleoli are the prominent contrasted structures of the cell nucleus. In the nucleolus, ribosomal RNAs are synthesized, processed and assembled with ribosomal proteins. RNA polymerase I synthesizes the ribosomal RNAs and this activity is cell cycle regulated. The nucleolus reveals the functional...
- Estimation of Mutagenic Effect and Modifications of Mitosis by Silver Nanoparticles. Prokhorova, I.; Kibrik, B.; Pavlov, A.; Pesnya, D. // Bulletin of Experimental Biology & Medicine;Dec2013, Vol. 156 Issue 2, p255
We analyzed mutagenic and mitosis-modifying effects of silver nanoparticles (Allium test). Chromosome aberrations and laggings and micronuclei were simultaneously registered in the same sample. Mitotic and phase indexes were calculated. No mutagenic effects were detected after treatment with...
- Standardization of bulb and root sample sizes for the Allium cepa test. Barbério, A.; Voltolini, J. C.; Mello, M. L. S. // Ecotoxicology;Apr2011, Vol. 20 Issue 4, p927
lthough the Allium cepa test has been widely used to identify potentially cytotoxic and genotoxic pollutants in aquatic environments, variable non-standardized choices have been made regarding the number of plant bulbs and roots analyzed. We propose numbers for bulbs and roots per bulb when...
- hyalosome. // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1100
A definition of the medical term "hyalosome," which refers to a faintly staining intranuclear structure that resembles a nucleolus, is presented.
- micronucleus. // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1464
A definition of the term "micronucleus," which refers to a small nucleus, is presented.
- nucleolonema. // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1601
A definition of the term "nucleolonema" is presented, referring to a fine network in the nucleolus of a cell.
- nucleolus. // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1601
An encyclopedia entry for "nucleolus" is presented, referring to a spherical structure in the nucleus of a cell made of DNA, RNA and protein.
- The dynamic nature of the nuclear envelope. Arnone, James T.; Walters, Alison D.; Cohen-Fix, Orna // Nucleus (1949-1034);Jul/Aug2013, Vol. 4 Issue 4, p261
In eukaryotes, chromosomes are encased by a dynamic nuclear envelope. In contrast to metazoans, where the nuclear envelope disassembles during mitosis, many fungi including budding yeast undergo "closed mitosis," where the nuclear envelope remains intact throughout the cell cycle. Consequently,...