Variation of the Cytological Structure in NicotianaMegagametophyte

Variation of the Cytological Structure in NicotianaMegagametophyte By screening about 70 000 embryo sacs (ES) of Nicotiana from diverse genotypes, including commercial cultivars, fertile and cytoplasmic male sterile lines, mutant and hybrid forms, we estimated the range of variation in the structural organization of the megagametophyte. According to the extent of expression of the major morphological traits, ES were classified into normal, subnormal, and anomalous with incomplete and complete development. A comparative analysis of cytological variations led us to conclusion that the changes in the megagametophyte morphology resulted from some distortion of one or several crucial events at such stages of megagametogenesis as mitotic division, polarization, cytokinesis, and cell differentiation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Variation of the Cytological Structure in NicotianaMegagametophyte

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2003 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1023822204081
Publisher site
See Article on Publisher Site

Abstract

By screening about 70 000 embryo sacs (ES) of Nicotiana from diverse genotypes, including commercial cultivars, fertile and cytoplasmic male sterile lines, mutant and hybrid forms, we estimated the range of variation in the structural organization of the megagametophyte. According to the extent of expression of the major morphological traits, ES were classified into normal, subnormal, and anomalous with incomplete and complete development. A comparative analysis of cytological variations led us to conclusion that the changes in the megagametophyte morphology resulted from some distortion of one or several crucial events at such stages of megagametogenesis as mitotic division, polarization, cytokinesis, and cell differentiation.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 17, 2004

References

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