Cytomixis in pollen mother cells of an apomictic ornamental Ervatamia divaricata (Linn.) alston.

Cytomixis and Associated Meiotic Abnormalities in Pollen Mother Cells of <i>Chlorophytum tuberosum</i> (Roxb.) Baker

“…1j Kwiatkowska et al (2003) and Ventela et al (2003) claimed cytomixis to happen in lower plants as well as during the spermatogenesis of animals. Cytomixis by cytoplasmic strands and direct contact of cells in the species, that under study here, is supported by the observations of similar occurrences in different plants made by other researchers (De and Sharma 1983, Sapre and Deshpande 1987, Bahl and Tyagi 1988, Haroun 1995, Singhal and Kumar 2008, Zhen-Qiao and Xing-Feng 2009. The higher rate of chromatin transfer in the first meiotic division, in comparison to the second division, observed here for all the individuals, is also in accordance with the findings of earlier reports (De and Sharma 1983, Consolaro and Pagliarini 1995, Bellucci et al 2003, Lattoo et al 2006.…”

“…Cytomixis by cytoplasmic strands and direct contact of cells in the species, that under study here, is supported by the observations of similar occurrences in different plants made by other researchers (De and Sharma 1983, Sapre and Deshpande 1987, Bahl and Tyagi 1988, Haroun 1995, Singhal and Kumar 2008, Zhen-Qiao and Xing-Feng 2009. The higher rate of chromatin transfer in the first meiotic division, in comparison to the second division, observed here for all the individuals, is also in accordance with the findings of earlier reports (De and Sharma 1983, Consolaro and Pagliarini 1995, Bellucci et al 2003, Lattoo et al 2006. A host of anomalies, such as spindle disturbance, unequal separation of chromosomes, chromosomal bridges, lagging and early or late separation of chromosomes, stickiness of chromosomes, excess chromatin and formation of micronuclei, all observed for C. tuberosum in this study, comply with the findings of previous researchers (Sheriff 1957, Kumar and Rao 1958, Pagliarini et al 1993, Haroun 1995, Lattoo et al 2006, Singhal and Kumar 2008, Zhen-Qiao and Xing-Feng 2009 in this species as well as in many other plant species.…”

“…Notwithstanding the enigmatic nature of cytomixis, some researchers have claimed it to be a regular and genetically controlled event, which is also influenced by some physiological and environmental factors (De and Sharma 1983, Zheng et al 1987, Bellucci et al 2003, Boldrinia et al 2006, Lattoo et al 2006. However, no difference in the frequency or types of cytomixis was observed in this study among the five populations of Chlorophytum tuberosum collected from different environments and edaphic conditions.…”

Persistent occurrence of meiotic abnormalities in a new hexaploid cytotype of Thalictrum foetidum from Indian cold deserts

“…However, in some of the accessions the chromatin transfer among PMCs extends up to late stages of meiosis II. The predominance of chromatin transfer during the earlier prophase stages of the first meiosis has also been recorded in Ervatamia divaricata (De & Sharma 1983), Centella asiatica (Consolaro & Pagliarini 1995), Boehmeria nivea (Pierozzi & Benatti 1998) and Meconopsis aculeata . In majority of the accessions, during cytomixis, PMCs are involved in groups (up to 21) in the transfer of chromatin material.…”

Cytomixis in Pollen Mother Cells of Polygonum tomentosum Schrank.

“…It was first recorded by Kronicke (1901) in pollen mother cells (PMS) of Crocus sativus, and occurs in several families of flowering plants (Bell 1964, Cheng et al 1975, Kamara 1960, Narain 1979, Omara 1976, Sirvastav and Rain 1980. Cytomixis is generally reported during microsporogensis in genetically unbalanced plants such as hybrids (de Nettancourt and Grant 1964), mutants (Gottschalk 1970, Datta andBiswas 1984), triploids (Salesses 1970), apomicts (Mantu andSharma 1983), plants affected by triflurine (Bobak and Harich 1978) and even in some normal diploids (Sapre 1978, Chauhan 1981.…”