Cytomixis in shoot apex of Norway spruce [Picea abies (L.) Karst.]

Guzicka, Marzenna; Woźny, Adam

doi:10.1007/s00468-004-0331-1

Cited by 24 publications

(11 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, it has also been reported in transgenic plants of Nicotiana tabacum (Sidorchuk et al 2007). Cytomixis is more commonly observed in meiotic cells but it has also been reported to occur in the somatic cells (Kostritsyna and Soldatov 1991, Wang et al 2004, Guzicka and Wozny 2005.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 96%

Cytomixis and associated meiotic abnormalities affecting pollen fertility in Clematis orientalis

Kumar¹,

Singhal²,

Kaur³

et al. 2010

Biol. plant.

View full text Add to dashboard Cite

Present cytological investigations from the cold desert regions of Lahaul-Spiti and Kinnaur (India) record the first ever tetraploid (2n=32) chromosome count and cytomixis in Clematis orientalis L. var. acutifolia Hook. f. et Thoms. The phenomenon of cytomixis (9.33 -29.80 %) involving chromatin transfer among 2 -3 proximate pollen mother cells (PMCs) during male meiosis occurs through narrow and broad cytoplasmic channels from early prophase to tetrad stage. However, frequency of its occurrence during the later meiotic stages is rather low. Chromatin transfer results into the formation of hypo-, hyperploid and enucleated PMCs. Various meiotic abnormalities associated with cytomixis such as chromatin stickiness, pycnotic chromatin, interbivalent connections, out of plate bivalents, late disjunction of bivalents, and laggards and bridges resulted into some pollen sterility (16.33 -49.30 %) and heterogeneous pollen grains size.

show abstract

Section: ⎯⎯⎯⎯mentioning

confidence: 96%

Cytomixis and associated meiotic abnormalities affecting pollen fertility in Clematis orientalis

Kumar¹,

Singhal²,

Kaur³

et al. 2010

Biol. plant.

View full text Add to dashboard Cite

show abstract

“…Since then, the phenomenon has been reported mainly during microsporogenesis in a wide range of fl owering plants (Heslop-Harrison 1966;Singhal and Gill 1985;Bedi 1990;Bione et al 2000;Datta et al 2005;Ghaffari 2006;Lattoo et al 2006;Singhal et al 2007). However, cytomixis is also known to occur in somatic cells such as root meristematic cells (Jacob 1941;Sarvella 1958), leaf epidermal and subepidermal layers (Tarkowska 1960), tapetal cells (Cooper 1952), ovary cells (Koul 1990) and shoot apex (Guzicka and Wozny 2005).…”

Section: Introductionmentioning

confidence: 99%

Impact of cytomixis on meiosis, pollen viability and pollen size in wild populations of Himalayan poppy (Meconopsis aculeata Royle)

2008

View full text Add to dashboard Cite

We report the occurrence of cytomixis in wild populations of Himalayan poppy (Meconopsis aculeata Royle),which is considered to be an important and threatened medicinal plant growing in the high hills of the Himalayas. The impact of cytomixis on meiotic behaviour, reduced pollen viability and heterogeneous-sized pollen grains was also studied. Cytological studies in the seven wild populations from the high hills of Himachal Pradesh revealed that all the Himalayan populations exist uniformly at the tetraploid level (2n=56) on x=14. The phenomenon of chromatin transfer among the proximate pollen mother cells (PMCs) in six populations caused various meiotic abnormalities. Chromatin transfer also resulted in the formation of coenocytes, aneuploid, polyploid and anucleated PMCs. Among individuals that showed chromatin transfer, chromosome stickiness and interbivalent connections were frequently observed in some PMCs. The phenomenon of cytomixis in the species seems to be directly under genetic control; it affects the meiotic course considerably and results in reduced pollen viability.

show abstract

“…It is rather curious that we have not found in the literature any information about cytomixis in the microsporogenesis of gymnosperms, although intercellular migration of nuclei is observed in somatic tissues of these plants (Guzicka and Wozny 2005) and the very phenomenon of cytomixis was first discovered in the gymnosperm megagametophyte (Arnoldy 1900).…”

Section: Prevalence In Higher Plantsmentioning

confidence: 99%

New insights into cytomixis: specific cellular features and prevalence in higher plants

Mursalimov

Sidorchuk

Дейнеко

2013

Planta

View full text Add to dashboard Cite

Cytomixis in shoot apex of Norway spruce [Picea abies (L.) Karst.]

Abstract: Atypical cell walls and nuclei were observed in

Cited by 24 publications

References 12 publications

Cytomixis and associated meiotic abnormalities affecting pollen fertility in Clematis orientalis

Cytomixis and associated meiotic abnormalities affecting pollen fertility in Clematis orientalis

Impact of cytomixis on meiosis, pollen viability and pollen size in wild populations of Himalayan poppy (Meconopsis aculeata Royle)

New insights into cytomixis: specific cellular features and prevalence in higher plants

Contact Info

Product

Resources

About