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  Extended darkness induces internal turnover of glucosinolates in Arabidopsis thaliana leaves

Brandt, S., Fachinger, S., Tohge, T., Fernie, A. R., Braun, H.-P., & Hildebrandt, T. M. (2018). Extended darkness induces internal turnover of glucosinolates in Arabidopsis thaliana leaves. PLoS One, 13(8), 1-15. doi:10.1371/journal.pone.0202153.

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Datensatz-Permalink: http://hdl.handle.net/21.11116/0000-0001-F1CA-B Versions-Permalink: http://hdl.handle.net/21.11116/0000-0001-F1CB-A
Genre: Zeitschriftenartikel

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 Urheber:
Brandt, Saskia1, Autor
Fachinger, Sara1, Autor
Tohge, T.2, Autor              
Fernie, A. R.2, Autor              
Braun, Hans-Peter1, Autor
Hildebrandt, Tatjana M.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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 Zusammenfassung: Prolonged darkness leads to carbohydrate starvation, and as a consequence plants degrade proteins and lipids to oxidize amino acids and fatty acids as alternative substrates for mitochondrial ATP production. We investigated, whether the internal breakdown of glucosinolates, a major class of sulfur-containing secondary metabolites, might be an additional component of the carbohydrate starvation response in Arabidopsis thaliana (A. thaliana). The glucosinolate content of A. thaliana leaves was strongly reduced after seven days of darkness. We also detected a significant increase in the activity of myrosinase, the enzyme catalyzing the initial step in glucosinolate breakdown, coinciding with a strong induction of the main leaf myrosinase isoforms TGG1 and TGG2. In addition, nitrilase activity was increased suggesting a turnover via nitriles and carboxylic acids. Internal degradation of glucosinolates might also be involved in diurnal or developmental adaptations of the glucosinolate profile. We observed a diurnal rhythm for myrosinase activity in two-week-old plants. Furthermore, leaf myrosinase activity and protein abundance of TGG2 varied during plant development, whereas leaf protein abundance of TGG1 remained stable indicating regulation at the transcriptional as well as post-translational level.

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Sprache(n): eng - Englisch
 Datum: 2018-09
 Publikationsstatus: Im Druck veröffentlicht
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1371/journal.pone.0202153
BibTex Citekey: 10.1371/journal.pone.0202153
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Titel: PLoS One
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: San Francisco, CA : Public Library of Science
Seiten: - Band / Heft: 13 (8) Artikelnummer: - Start- / Endseite: 1 - 15 Identifikator: ISSN: 1932-6203
CoNE: /journals/resource/1000000000277850