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  Aethionema arabicum: a novel model plant to study the light control of seed germination

Scheid, O. M., Mérai, Z., Graeber, K., Arshad, W., Leubner-Metzger, G., Grosche, C., et al. (2019). Aethionema arabicum: a novel model plant to study the light control of seed germination. Journal of Experimental Botany, erz146. doi:10.1093/jxb/erz146.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-71FB-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-71FC-2
Genre: Journal Article

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 Creators:
Scheid, Ortrun Mittelsten, Author
Mérai, Zsuzsanna, Author
Graeber, Kai, Author
Arshad, Waheed, Author
Leubner-Metzger, Gerhard, Author
Grosche, Christopher, Author
Ullrich, Kristian K.1, Author              
Wilhelmsson, Per, Author
Rensing, Stefan A, Author
Tarkowská, Danuše, Author
Strnad, Miroslav, Author
Turečková, Veronika, Author
Affiliations:
1Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445635              

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Free keywords: Aethionema arabicum, light inhibition, model plant, natural variation, seed germination, transcriptional regulation
 Abstract: Timing of seed germination is crucial for seed plants and coordinated by internal and external cues, reflecting adaptations to different habitats. Physiological and molecular studies with lettuce and Arabidopsis thaliana have documented a strict requirement for light to initiate germination and identified many receptors, signalling cascades, and hormonal control elements. In contrast, seed germination of several other plants is inhibited by light, but the molecular basis of this converse response is unknown. We describe Aethionema arabicum (Brassicaceae) as a suitable model plant to investigate the mechanism of germination inhibition by light, as it comprises accessions with natural variation between light-sensitive and light-neutral responses. Inhibition occurs in red, blue or far-red light and increases with light intensity and duration. Gibberellins and abscisic acid are involved in the control of germination as in Arabidopsis, but transcriptome comparisons of light- and dark-exposed Aethionema arabicum seeds revealed that expression of genes for key regulators upon light exposure undergo converse changes, resulting in antipodal hormone regulation. This illustrates that similar modular components of a pathway in light-inhibited, light-neutral and light requiring germination among the Brassicaceae have been assembled by evolution to produce divergent pathways, likely as adaptive traits.

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Language(s): eng - English
 Dates: 2019-04-052019-04-05
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: DOI: 10.1093/jxb/erz146
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Title: Journal of Experimental Botany
  Other : J. Exp. Bot
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press [etc.]
Pages: - Volume / Issue: - Sequence Number: erz146 Start / End Page: - Identifier: ISSN: 0022-0957
CoNE: https://pure.mpg.de/cone/journals/resource/954925413883