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  Restriction of cytosolic sucrose hydrolysis profoundly alters development, metabolism and gene expression in Arabidopsis roots

Pignocchi, C., Ivakov, A., Feil, R., Trick, M., Pike, M., Wang, T. L., et al. (2020). Restriction of cytosolic sucrose hydrolysis profoundly alters development, metabolism and gene expression in Arabidopsis roots. Journal of Experimental Botany, 72(5), 1850-1863. doi:10.1093/jxb/eraa581.

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 Urheber:
Pignocchi, Cristina1, Autor
Ivakov, A.2, Autor           
Feil, R.2, Autor           
Trick, Martin1, Autor
Pike, Marilyn1, Autor
Wang, Trevor L1, Autor
Lunn, J. E.2, Autor           
Smith, Alison M1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              

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 Zusammenfassung: Plant roots depend on sucrose imported from leaves as the substrate for metabolism and growth. Sucrose and hexoses derived from it are also signalling molecules that modulate growth and development, but the importance for signalling of endogenous changes in sugar levels is poorly understood. We report that reduced activity of cytosolic invertase, which converts sucrose to hexoses, leads to pronounced metabolic, growth and developmental defects in roots of Arabidopsis (Arabidopsis thaliana) seedlings. In addition to altered sugar and downstream metabolite levels, roots of cinv1 cinv2 mutants have reduced elongation rates, cell and meristem size, abnormal meristematic cell division patterns, and altered expression of thousands of genes of diverse functions. Provision of exogenous glucose to mutant roots repairs relatively few of the defects. The extensive transcriptional differences between mutant and wild-type roots have hallmarks of both high sucrose and low hexose signalling. We conclude that the mutant phenotype reflects both low carbon availability for metabolism and growth and complex sugar signals derived from elevated sucrose and depressed hexose levels in the cytosol of mutant roots. Such reciprocal changes in endogenous sucrose and hexose levels potentially provide rich information about sugar status that translates into flexible adjustments of growth and development.

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Sprache(n): eng - English
 Datum: 2020-12
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1093/jxb/eraa581
BibTex Citekey: 10.1093/jxb/eraa581
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Titel: Journal of Experimental Botany
  Andere : J. Exp. Bot
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford : Oxford University Press [etc.]
Seiten: - Band / Heft: 72 (5) Artikelnummer: - Start- / Endseite: 1850 - 1863 Identifikator: ISSN: 0022-0957
CoNE: https://pure.mpg.de/cone/journals/resource/954925413883