Effect of gibberellin on Arabidopsis growth, development, and hormonal balance under green and blue light

Effect of gibberellin on Arabidopsis growth, development, and hormonal balance under green and... The role of gibberellins in plant morphology under selective light was studied. A comparison of the effects of green and blue light on growth, development, and hormonal balance was performed for two Arabidopsis thaliana (L.) Heynh. (ecotype Landsberg erecta lines: wild type Ler and its ga4-1 mutant with suppressed GA4/1 synthesis. The absence of active GA4/1 from ga4-1 mutant determined its retarded growth, slowed passing through developmental phases, suppressed apical dominance, and reduced seed productivity. The retarded growth and development of the mutant was related to changed hormonal balance in them as compared to wild-type line: IAA content and the IAA/ABA ratio were declined, zeatin riboside and ABA accumulated. Green light retarded stem elongation and branching, reduced leaf specific surface density and plant seed productivity, and retarded plant transition to reproduction to a greater degree at GA4/1 deficit (ga4-1) than at its normal content (Ler). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Effect of gibberellin on Arabidopsis growth, development, and hormonal balance under green and blue light

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Publisher
Springer Journals
Copyright
Copyright © 2008 by MAIK Nauka
Subject
Life Sciences; Plant Sciences ; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443708030047
Publisher site
See Article on Publisher Site

Abstract

The role of gibberellins in plant morphology under selective light was studied. A comparison of the effects of green and blue light on growth, development, and hormonal balance was performed for two Arabidopsis thaliana (L.) Heynh. (ecotype Landsberg erecta lines: wild type Ler and its ga4-1 mutant with suppressed GA4/1 synthesis. The absence of active GA4/1 from ga4-1 mutant determined its retarded growth, slowed passing through developmental phases, suppressed apical dominance, and reduced seed productivity. The retarded growth and development of the mutant was related to changed hormonal balance in them as compared to wild-type line: IAA content and the IAA/ABA ratio were declined, zeatin riboside and ABA accumulated. Green light retarded stem elongation and branching, reduced leaf specific surface density and plant seed productivity, and retarded plant transition to reproduction to a greater degree at GA4/1 deficit (ga4-1) than at its normal content (Ler).

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: May 15, 2008

References

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