A comparative analysis of the Arabidopsis mutant amp1-1 and a novel weak amp1 allele reveals new functions of the AMP1 protein

A comparative analysis of the Arabidopsis mutant amp1-1 and a novel weak amp1 allele reveals new functions of the AMP1 protein

Ethylene and gibberellins have a synergistic stimulatory effect on hypocotyl elongation of light-grown Arabidopsis thaliana (L.) Heynh. seedlings. A screen for mutants with decreased response to these hormones led to the isolation of a novel allele (amp1-7) of the ALTERED MERISTEM PROGRAM (AMP) 1 lo...

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Publié dans:Planta. - Springer Science + Business Media. - 225(2007), 4, Seite 831-842
Auteur principal: Saibo, Nelson J. M. (Auteur)
Autres auteurs: Vriezen, Wim H., De Grauwe, Liesbeth, Azmi, Abdelkrim, Prinsen, Els, Van Der Straeten, Dominique
Format: Article en ligne
Langue:English
Publié: 2007
Accès à la collection:Planta
Sujets:Biological sciences Physical sciences
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100 1 |a Saibo, Nelson J. M.  |e verfasserin  |4 aut 
245 1 2 |a A comparative analysis of the Arabidopsis mutant amp1-1 and a novel weak amp1 allele reveals new functions of the AMP1 protein 
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520 |a Ethylene and gibberellins have a synergistic stimulatory effect on hypocotyl elongation of light-grown Arabidopsis thaliana (L.) Heynh. seedlings. A screen for mutants with decreased response to these hormones led to the isolation of a novel allele (amp1-7) of the ALTERED MERISTEM PROGRAM (AMP) 1 locus. The amp1-7 allele contains a missense mutation causing a phenotype, which is weaker than that of the amp1-1 mutant that carries a nonsense mutation. The mutant phenotype prompted the hypothesis that AMP1 is involved in ethylene and GA signalling pathways or in a parallel pathway-controlling cell and hypocotyl elongation and cellular organization. Amp1 mutants contain higher zeatin concentrations causing enlargement of the apical meristem, which was confirmed by cytokinin application to wild type seedlings. Light grown amp1 seedlings have shorter hypocotyls than wild type; however, application of cytokinins promotes hypocotyl elongation of both Col-0 and amp1. We suggest that in amp1 mutants either zeatin overproduction or its action is strictly localized. 
540 |a © Springer-Verlag Berlin Heidelberg 2007 
650 4 |a Biological sciences  |x Biology  |x Developmental biology  |x Growth and development  |x Biological development  |x Plant development  |x Plant reproduction  |x Seeds  |x Seed anatomy  |x Plant embryo  |x Hypocotyls 
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650 4 |a Biological sciences  |x Biology  |x Genetics  |x Phenotypes 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plant physiology  |x Plant growth  |x Plant growth regulators 
650 4 |a Biological sciences  |x Biology  |x Genetics  |x Population genetics  |x Genetic variation  |x Genetic mutation 
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650 4 |a Biological sciences  |x Biochemistry  |x Biomolecules  |x Hormones  |x Gibberellins 
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700 1 |a Vriezen, Wim H.  |e verfasserin  |4 aut 
700 1 |a De Grauwe, Liesbeth  |e verfasserin  |4 aut 
700 1 |a Azmi, Abdelkrim  |e verfasserin  |4 aut 
700 1 |a Prinsen, Els  |e verfasserin  |4 aut 
700 1 |a Van Der Straeten, Dominique  |e verfasserin  |4 aut 
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773 1 8 |g volume:225  |g year:2007  |g number:4  |g pages:831-842 
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