%0 Journal Article %1 kreisz2023ssub1sub %A Kreisz, P. %A Hellens, A.M. %A Fröschel, C. %A Krischke, M. %A Maag, D. %A Feil, R. %A Wildenhain, T. %A Draken, J. %A Braune, G. %A Erdelitsch, L. %A Cecchino, L. %A Wagner, T.C. %A Mueller, M.J. %A Becker, D. %A Lunn, J.E. %A Hanson, J. %A Beveridge, C.A. %A Fichtner, F. %A Barbier, F.F. %A Weiste, C. %D 2023 %J bioRxiv %K imported myOwn uni_network %P 2023.05.23.541964 %R 10.1101/2023.05.23.541964 %T S₁ basic leucine zipper transcription factors shape plant architecture by controlling C/N partitioning to apical and lateral organs %U https://www.biorxiv.org/content/biorxiv/early/2023/05/24/2023.05.23.541964.full.pdf %X Plants exhibit an immense plasticity in their architecture. While the impact of hormonal regulation is well-characterised, the importance of sugar-signalling has just recently emerged. Here, we addressed which sugar-signalling components mediate the trade-off between growth of apical versus lateral meristems and how they control organ sink-strength. Thereby, we unravelled a novel developmental function of the sugar-controlled S1 basic-leucine-zipper (S1-bZIP) transcription factors in establishing global source-sink interactions. Applying comprehensive molecular, analytical, and genetic approaches, we demonstrate that S1-bZIPs operate in a redundant manner to control tissue-specific expression of defined SWEET sugar-transporters and the GAT1_2.1 glutaminase. By these means, S1-bZIPs control carbohydrate (C)-channelling from source leaves to apical shoot and root organs and tune systemic organic nitrogen (N)-supply to restrict lateral organ formation by C/N depletion. Knowledge of the underlying mechanisms controlling plant C/N partitioning is of pivotal importance for breeding strategies to generate plants with desired architectural and nutritional characteristics.Competing Interest StatementThe authors have declared no competing interest.

@article{kreisz2023ssub1sub, abstract = {Plants exhibit an immense plasticity in their architecture. While the impact of hormonal regulation is well-characterised, the importance of sugar-signalling has just recently emerged. Here, we addressed which sugar-signalling components mediate the trade-off between growth of apical versus lateral meristems and how they control organ sink-strength. Thereby, we unravelled a novel developmental function of the sugar-controlled S1 basic-leucine-zipper (S1-bZIP) transcription factors in establishing global source-sink interactions. Applying comprehensive molecular, analytical, and genetic approaches, we demonstrate that S1-bZIPs operate in a redundant manner to control tissue-specific expression of defined SWEET sugar-transporters and the GAT1_2.1 glutaminase. By these means, S1-bZIPs control carbohydrate (C)-channelling from source leaves to apical shoot and root organs and tune systemic organic nitrogen (N)-supply to restrict lateral organ formation by C/N depletion. Knowledge of the underlying mechanisms controlling plant C/N partitioning is of pivotal importance for breeding strategies to generate plants with desired architectural and nutritional characteristics.Competing Interest StatementThe authors have declared no competing interest.}, added-at = {2024-02-15T15:11:54.000+0100}, author = {Kreisz, P. and Hellens, A.M. and Fröschel, C. and Krischke, M. and Maag, D. and Feil, R. and Wildenhain, T. and Draken, J. and Braune, G. and Erdelitsch, L. and Cecchino, L. and Wagner, T.C. and Mueller, M.J. and Becker, D. and Lunn, J.E. and Hanson, J. and Beveridge, C.A. and Fichtner, F. and Barbier, F.F. and Weiste, C.}, biburl = {https://www.bibsonomy.org/bibtex/2d39b828e0f1ced0f85ed603b26d4af74/jvsi_all}, doi = {10.1101/2023.05.23.541964}, interhash = {3a185573d79e1db66fd3de31106b9d0c}, intrahash = {d39b828e0f1ced0f85ed603b26d4af74}, journal = {bioRxiv}, keywords = {imported myOwn uni_network}, pages = {2023.05.23.541964}, timestamp = {2024-02-15T15:11:54.000+0100}, title = {S₁ basic leucine zipper transcription factors shape plant architecture by controlling C/N partitioning to apical and lateral organs}, type = {Journal Article}, url = {https://www.biorxiv.org/content/biorxiv/early/2023/05/24/2023.05.23.541964.full.pdf}, year = 2023 }