The role of hormonal balance in plant adaptation to flooding

The effect of flooding on the growth parameters and hormonal dynamics (auxins, abscisic acid, cytokinins, gibberellins, and ethylene) has been studied in a vegetation experiment on the leaves of wheat (Triticum aestivum L.) and oat (Avena sativa L.). Growth inhibition during flooding in both species...

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Bibliographic Details
Published in:	Izvestiia Akademii nauk. Seriia biologicheskaia no. 6; p. 682
Main Authors:	Bakhtenko, E Iu, Skorobogatova, I V, Karsunkina, N P
Format:	Journal Article
Language:	Russian
Published:	Russia (Federation) 01-11-2007
Subjects:	Acclimatization - physiology Avena - growth & development Avena - metabolism Floods Plant Growth Regulators - metabolism Plant Leaves - growth & development Plant Leaves - metabolism Species Specificity Triticum - growth & development Triticum - metabolism
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Summary:	The effect of flooding on the growth parameters and hormonal dynamics (auxins, abscisic acid, cytokinins, gibberellins, and ethylene) has been studied in a vegetation experiment on the leaves of wheat (Triticum aestivum L.) and oat (Avena sativa L.). Growth inhibition during flooding in both species was due to the accumulation of abscisic acid and ethylene, while the repair processes were due to the increased level of auxins, cytokinins, and gibberellins. The difference in the hormonal response in wheat and oat to flooding, in particular, the degree and timing of accumulation of abscisic and indoleacetic acids and different dynamics of the level of cytokinins and gibberellins, induced their different physiological response, which determined the level of their resistance. The growth control of cereals during flooding as well as the hormonal dynamics are proposed to rely on the strategy of plant ontogenetic adaptation.
ISSN:	1026-3470