Tapetal Cell Nuclear Characteristics of Some Kuwaiti Plants.

Plant polytene chromosomes

“…During the tapetal differentiation, three cellular types can be observed, i.e. multinucleate cells, with more than one diploid nucleus (Malallah et al, 1996), mononucleate cells, with a single polyploid nuclei (Carvalheira, G.M.G. and Guerra, M., unpublished data), and mono-or binucleate cells, with one or two polytene nuclei .…”

“…However, cytogenetical analysis of the tapetal cells of Vigna species has revealed that this tissue can present very peculiar characteristics . Anther tapetum cells are characterized by the presence of endomitotic or endoreduplication cycles (Cooper, 1933;D'Amato, 1984D'Amato, , 1989Malallah et al, 1996). In species where the tapetum layer is composed of mononucleate cells, the increase in DNA content is generally a consequence of several endoreduplication cycles, while in species with bi-or multinucleate cells in the tapetum it is the endomitotic cycle which is responsible.…”

Evaluation of mitotic activity in tapetal cells of grapevine (Vitis L.)

“…In Cymbidium aloifolium, C. devonianum and C. tigrinum (2n=40), for instance, at most two diploid chromosome groups at prometaphase and anaphase have been reported (Sharma et al, 2012), two diploid or two tetraploid chromosome groups at metaphase were noted in A. thaliana (2n=10) (Weiss and Maluszynska, 2001) and two to four nuclei were counted at interphase in Campsis radicans (2n=40) tapetal cells (Konyar and Dane, 2013). Though, in Eremurus himalaicus (2n=14) (Oksala and Therman, 1977) and Picris babylonica (2n=10) (Malallah et al, 1996) four diploid and more than six diploid chromosome groups, respectively, at metaphase were viewed in the same cell.…”

“…In grapevines, besides the endomitosis in the tapetal cells, a fusion process involving two or more chromosome groups in the same cells may have also occurred. It seems that nuclear fusion is not a rare event in tapetum tissue and nuclear fusion involving two polyploid chromosome groups were also reported in tapetal cells of Solanum tuberosum (Avanzi, 1950), Senescio glaucus, Picris babylonica and Launaea mucronata as well (Malallah et al, 1996), for instance.…”

Performance of Ornamental Plantsin Bioremediated Soil

“…These atmospheric pollutants transform promutagens into mutagens (Lee et al, 1996). Malallah et al (1996Malallah et al ( , 1997Malallah et al ( , 1998 reported increased anther sterility, and the occurrence of meiotic irregularities and inhibition due to oil pollution.…”