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PMID: 10759513 Published · ppublish English Journal Article Research Support, U.S. Gov't, Non-P.H.S.

Abscisic acid inhibition of radicle emergence but not seedling growth is suppressed by sugars.

Plant physiology ·Vol. 122 ·No. 4 ·2000-04-00 ·Pages 1179-86

Finkelstein RR, Lynch TJ

Abstract

Low concentrations of sugars altered the sensitivity of seed germination to inhibition by exogenous abscisic acid (ABA). Germination of wild-type and ABA-insensitive (abi) Arabidopsis seeds was assayed on media containing ABA and a variety of sugars and sugar alcohols. The inhibitory effects of ABA were strongly repressed in the presence of 15 to 90 mM glucose (Glc), sucrose, or fructose, but not by comparable concentrations of sorbitol or mannitol. Several features of the response to Glc are inconsistent with a purely nutritional effect: The optimal sugar concentration is low and differs between the wild type and the abi mutants. Furthermore, Glc suppression of ABA inhibition is light dependent and limited to the process of radicle emergence.

MeSH Terms
Abscisic Acid/pharmacology Arabidopsis/drug effects,growth & development Carbohydrates/pharmacology
Chemicals
Carbohydrates Abscisic Acid
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Finkelstein R R
Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, California 93106, USA. [email protected]
Lynch T J
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Article Info
Journal
Plant physiology
Abbr.
Plant Physiol
ISSN
0032-0889
DOI
10.1104/pp.122.4.1179
Email
[email protected]
Published
2000-04-00
Pages
1179-86
Language
English
Region
United States
NLM ID
0401224
PMCID
PMC58952
Subset
IM
External Links
PubMed source DOI: 10.1104/pp.122.4.1179 PMC Full Text View journal details
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