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PMID: 14648119 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Glucose delays seed germination in Arabidopsis thaliana.

Planta ·Vol. 218 ·No. 4 ·2004-02-00 ·Pages 579-88

Dekkers BJ, Schuurmans JA, Smeekens SC

Abstract

Here we report that glucose delays germination of Arabidopsis thaliana (L.) Heynh. seeds at concentrations below those known to inhibit early seedling development. This inhibition acts on embryo growth and is independent of hexokinase (HXK) function. Hormones and hormone inhibitors were applied to the germination media and several hormone biosynthesis and signalling mutants were tested on glucose media to investigate a possible role of abscisic acid (ABA), gibberellin and ethylene in the glucose-induced germination delay. Results indicate that the germination inhibition by glucose cannot be antagonized by ethylene or gibberellin and is independent of the HXK1/ABA/ ABI4 signalling cascade. These findings suggest that there is a separate regulatory pathway independent of ABI2/ ABI4/ ABI5. Thus, in a relatively short time frame sugars utilize different signalling cascades to inhibit germination and post-germination growth, underlining the complexity of sugar responses.

MeSH Terms
Abscisic Acid/pharmacology Arabidopsis/drug effects,genetics Germination/physiology Glucose/metabolism,pharmacology Plant Growth Regulators/pharmacology Seeds/drug effects,physiology Signal Transduction Sorbitol/metabolism
Chemicals
Plant Growth Regulators Sorbitol Abscisic Acid Glucose
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Dekkers Bas J W
Department of Plant Biology, Molecular Plant Physiology, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The Netherlands. s.j.w.dekkers@bio.uu.nl
Schuurmans Jolanda A M J
Smeekens Sjef C M
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Article Info
Journal
Planta
Abbr.
Planta
ISSN
0032-0935
DOI
10.1007/s00425-003-1154-9
Email
s.j.w.dekkers@bio.uu.nl
Published
2004-02-00
Epub
2003-00-25
Pages
579-88
Language
English
Region
Germany
NLM ID
1250576
Subset
IM
External Links
PubMed source DOI: 10.1007/s00425-003-1154-9 View journal details
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