The Egg Cell: Development and Role in Fertilization and Early Embryogenesis.

Russell, Scott D.

doi:10.1105/tpc.5.10.1349

Cited by 146 publications

(79 citation statements)

References 38 publications

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“…After megasporogenesis the surviving megaspore undergoes three rounds of mitosis, producing an eight-nucleate syncytium. Following nuclear repositioning cellularization is initiated at the interfaces of overlapping arrays of microtubules that emanate radially from individual nuclei (Brown and Lemmon 1991a;Russell 1993). Regulation of cellularization in the embryo sac plays a critical role in the development of the embryo and the endosperm.…”

Section: Introductionmentioning

confidence: 99%

Gemini pollen 2, a male and female gametophytic cytokinesis defective mutation

Park

Rahman

et al. 2004

Sex Plant Reprod

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Gametophytic cytokinesis is essential for the development and function of the male and female gametophytes. We have previously described the isolation and characterisation of the gemini pollen 1 (gem1) that acts gametophytically to disturb asymmetric division and cytokinesis at pollen mitosis I in Arabidopsis. Here we describe the genetic and cytological analysis of an independent gametophytic mutant, gem2, with similar characteristics to gem1, but which maps to a different genetic locus. gem2 shows reduced genetic transmission through both male and female gametes and leads to the production of divided or twin-celled pollen. Developmental analysis revealed that gem2 does not affect karyokinesis at pollen mitosis I, but leads to repositioning of the cell plate and partial or complete failure of cytokinesis, resulting in symmetrical divisions or binucleate pollen grains respectively. Symmetrical divisions lead to altered pollen cell fate with both sister cells displaying vegetative cell fate. Moreover, we demonstrate that the predominant female defect in gem2 is a lack of cellularization of the embryo sac during megagametogenesis. GEM2 therefore defines an independent genetic locus that is involved in the correct specification of both male and female gametophytic cytokinesis.

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Section: Introductionmentioning

confidence: 99%

Gemini pollen 2, a male and female gametophytic cytokinesis defective mutation

Park

Rahman

et al. 2004

Sex Plant Reprod

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“…Then the spermatic cells are discharged into one of the synergids through the filiform apparatus (Yadegari & Drews, 2004). Double fertilization takes place when one spermatic nucleus fuses with the egg cell forming the zygote (diploid), while the second sperm fuses with the polar nuclei of the central cell to initiate the endosperm (generally triploid) (Russell, 1993).…”

Section: Zygotic Embryogenesismentioning

confidence: 99%

“…Double fertilization is one of the main characteristics of angiosperms where one male gamete fertilizes the egg cell and a second male gamete fertilizes the central cell of the embryo sac (Russell, 1993).…”

Section: Zygotic Embryogenesismentioning

confidence: 99%

Plant Somatic Embryogenesis: Some Useful Considerations

Gutiérrez-Mora¹,

González-Gutiérrez²,

Rodrı́guez-Garay³

et al. 2012

Embryogenesis

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“…2010). However, the unique features of the egg cell underlying its biochemical identity, 3 metabolic activity, and developmental potential are still poorly understood (Russell 1993). 4…”

Section: Est Sequencing 12mentioning

confidence: 99%