Atypical embryo sacs in Allium cepa L.

1169 9 4817 2 13410 document 4817 256421653_Atypical_embryo_sacs_in_Allium_cepa_L_ev=prf_pub text/html ecef78eea58ec2c328a8e98a6efecbd0 MD5 113114 2014-02-21 15:02:09 http://eprints.iliauni.edu.ge/1169/1/256421653_Atypical_embryo_sacs_in_Allium_cepa_L_ev%3Dprf_pub 1169 1 1 text/html text en public

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7775 1 21108 document 7775 Pages from Allium cepa1.pdf application/pdf 27672c0204fc5774febf8e0f1a11fa43 MD5 98868 2015-03-24 11:11:44 http://eprints.iliauni.edu.ge/1169/2/Pages%20from%20Allium%20cepa1.pdf 1169 2 2 application/pdf text ge public

Pages from Allium cepa1.pdf

7789 2 21123 document 7789 lightbox.jpg image/png 8c9e61cfbdc33e464a0d0ea243dae041 MD5 58907 2015-03-24 11:22:13 http://eprints.iliauni.edu.ge/1169/3/lightbox.jpg 1169 3 3 image/png other Thumbnails conversion from text to thumbnail_lightbox ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/7775 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/7775 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/7775 archive 65 disk0/00/00/11/69 2014-02-24 07:52:00 2015-03-24 11:11:44 2014-02-24 07:52:00 article show maia_akhalkatsi@iliauni.edu.ge Nadirashvili Nino Gvaladze Guranda Akhalkatsi Maia maia_akhalkatsi@iliauni.edu.ge Atypical embryo sacs in Allium cepa L. pub QK SB public Atypical embryo sacs have been revealed in Allium cepa L. The structural changes in Allium type embryo sac in this species take place in all three groups of cells – egg apparatus, central cell and antipodals. The following atypical developmental patterns have been observed: 1. Variation in the number of egg cells (1-3), synergids (1-6), polar nuclei (2-4) and antipodals (3-5); 2. Transformation of synergids and antipodals into additional egg cell; 3. Hypertrophy of more than one synergid and antipodals. It is assume that increase in the number of hypertrophic synergids and antipodals may improve nutrition of the developing embryo. And, the formation of additional egg cells derived from synergids or antipodals may increase probability that the ovule produces a seed. The additional embryos might be formed from egg-like synergids and antipodal cells. The increase in the number of cells in the embryo sac may be explained by mutations leading to the normal mitotic divisions in synergids and antipodals instead of endomitosis occurring during hypertrophy. In general, the female gametophyte in this species shows tendency in increase of structures responsible for seed formation. 2005-01-01 published Bulletin of the Georgian National Academy of Sciences 171 2 Georgian National Academy of Sciences 312-314 https://www.researchgate.net/publication/256421653_Atypical_embryo_sacs_in_Allium_cepa_L?ev=prf_pub TRUE 0132 - 1447 http://www.science.org.ge/english.html http://scholar.google.com/citations?view_op=view_citation&hl=en&user=SLNYbL0AAAAJ&cstart=40&citation_for_view=SLNYbL0AAAAJ:isC4tDSrTZIC