Dynamics of IAA and cytokinins in flower tissues of transgenic tobacco mutant plants with mutant phenotype

Dynamics of IAA and cytokinins in flower tissues of transgenic tobacco mutant plants with mutant... A comparative analysis of IAA and total cytokinin contents at various developmental stages of floral morphogenesis (I–XII) in transgenic tobacco (Nicotiana tabacum L.) plants with mutant phenotypes was performed. Disturbances in flower structure were correlated with changes in the content and dynamics of these phytohormones. In plants with the phenotype “wavy corolla”, IAA content increased by three times as compared with control at stage VIII; in plants with the phenotype “longostyly”, IAA content increased gradually from VIII to XII stage and sharply (by nine times) at stage XII. In plants with the phenotype “wavy corolla”, total content of cytokinins was lower than in control at all developmental stages (except for stage I), whereas their dynamics coincided with that in control flowers. In plants with the phenotype “longostyly”, cytokinin content was twice lower than in control at early developmental stages, whereas it oscillated at later stages, approaching to control value at stage XII. It is supposed that differences observed could result from T-DNA insertion into plant own genes, which led to changes in the content and dynamics of phytohormones in developing flowers and production of anomalies in the flower structure. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Dynamics of IAA and cytokinins in flower tissues of transgenic tobacco mutant plants with mutant phenotype

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2009 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Sciences ; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443709060132
Publisher site
See Article on Publisher Site

Abstract

A comparative analysis of IAA and total cytokinin contents at various developmental stages of floral morphogenesis (I–XII) in transgenic tobacco (Nicotiana tabacum L.) plants with mutant phenotypes was performed. Disturbances in flower structure were correlated with changes in the content and dynamics of these phytohormones. In plants with the phenotype “wavy corolla”, IAA content increased by three times as compared with control at stage VIII; in plants with the phenotype “longostyly”, IAA content increased gradually from VIII to XII stage and sharply (by nine times) at stage XII. In plants with the phenotype “wavy corolla”, total content of cytokinins was lower than in control at all developmental stages (except for stage I), whereas their dynamics coincided with that in control flowers. In plants with the phenotype “longostyly”, cytokinin content was twice lower than in control at early developmental stages, whereas it oscillated at later stages, approaching to control value at stage XII. It is supposed that differences observed could result from T-DNA insertion into plant own genes, which led to changes in the content and dynamics of phytohormones in developing flowers and production of anomalies in the flower structure.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Nov 6, 2009

References

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