Variability of Chloroplast Number in Populations of Stomata Guard Cells in Sugar Beet Beta vulgaris L.

Variability of Chloroplast Number in Populations of Stomata Guard Cells in Sugar Beet Beta... Diploid sugar beet plants demonstrate a broad variability of the number of chloroplasts in stomata guard cells, which is related to mixoploidy of cell populations in leaf apical meristems (epigenomic variability). In addition to random organelle segregation between daughter cells, this variability is affected by factors disrupting the mitotic cycle: (1) plant treatment with a mitotic poison, such as colchicine; (2) duration of the life cycle of a plant; the variability in second-year plants is greater than in first-year ones; (3) the mode of plant reproduction; the variability in inbred plants is greater than in the initial population. Treatment of germinating seeds with a diluted colchicine solution increases the number of organelles in cells in the myxoploid generation (generation C0) and the variance of the distributions in the first vegetation year. The variability in the organelle number in stomata cells correlates with that in maternal meristem cells. It is concluded that the epidermal cell monolayer (including stomata guard cells) keeps record of the epigenomic and epiplastome variability in meristem cells. The variability of the number of chloroplasts in stomata guard cells is approximated by binomials with negative powers. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Variability of Chloroplast Number in Populations of Stomata Guard Cells in Sugar Beet Beta vulgaris L.

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Biomedicine; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1023/A:1013715811836
Publisher site
See Article on Publisher Site

Abstract

Diploid sugar beet plants demonstrate a broad variability of the number of chloroplasts in stomata guard cells, which is related to mixoploidy of cell populations in leaf apical meristems (epigenomic variability). In addition to random organelle segregation between daughter cells, this variability is affected by factors disrupting the mitotic cycle: (1) plant treatment with a mitotic poison, such as colchicine; (2) duration of the life cycle of a plant; the variability in second-year plants is greater than in first-year ones; (3) the mode of plant reproduction; the variability in inbred plants is greater than in the initial population. Treatment of germinating seeds with a diluted colchicine solution increases the number of organelles in cells in the myxoploid generation (generation C0) and the variance of the distributions in the first vegetation year. The variability in the organelle number in stomata cells correlates with that in maternal meristem cells. It is concluded that the epidermal cell monolayer (including stomata guard cells) keeps record of the epigenomic and epiplastome variability in meristem cells. The variability of the number of chloroplasts in stomata guard cells is approximated by binomials with negative powers.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Oct 13, 2004

References

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