Expression patterns within the Arabidopsis C/S1 bZIP transcription factor network: availability of heterodimerization partners controls gene expression during stress response and development
- Author(s)
- Fridtjof Weltmeier, Fatima Rahmani, Andrea Ehlert, Katrin Dietrich, Katia Schütze, Xuang Wang, Christina Chaban, Johannes Hanson, Markus Teige, Klaus Harter, Jesus Vicente-Carbajosa, Sjef Smeekens, Wolfgang Dröge-Laser
- Abstract
Members of the Arabidopsis group C/S1 basic leucine zipper (bZIP) transcription factor (TF) network are proposed to implement transcriptional reprogramming of plant growth in response to energy deprivation and environmental stresses. The four group C and five group S1 members form specific heterodimers and are, therefore, considered to cooperate functionally. For example, the interplay of C/S1 bZIP TFs in regulating seed maturation genes was analyzed by expression studies and target gene regulation in both protoplasts and transgenic plants. The abundance of the heterodimerization partners significantly affects target gene transcription. Therefore, a detailed analysis of the developmental and stress related expression patterns was performed by comparing promoter: GUS and transcription data. The idea that the C/S1 network plays a role in the allocation of nutrients is supported by the defined and partially overlapping expression patterns in sink leaves, seeds and anthers. Accordingly, metabolic signals strongly affect bZIP expression on the transcriptional and/or post-transcriptional level. Sucrose induced repression of translation (SIRT) was demonstrated for all group S1 bZIPs. In particular, transcription of group S1 genes strongly responds to various abiotic stresses, such as salt (AtbZIP1) or cold (AtbZIP44). In summary, heterodimerization and expression data provide a basic framework to further determine the functional impact of the C/S1 network in regulating the plant energy balance and nutrient allocation.
- Organisation(s)
- Department of Biochemistry and Cell Biology
- External organisation(s)
- Georg-August-Universität Göttingen, Utrecht University, Eberhard Karls Universität Tübingen, Universidad Politécnica de Madrid
- Journal
- Plant Molecular Biology: an international journal on molecular biology, biochemistry and genetic engineering
- Volume
- 69
- Pages
- 107-119
- No. of pages
- 13
- ISSN
- 0167-4412
- DOI
- https://doi.org/10.1007/s11103-008-9410-9
- Publication date
- 2009
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 106002 Biochemistry, 106023 Molecular biology
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/expression-patterns-within-the-arabidopsis-cs1-bzip-transcription-factor-network-availability-of-heterodimerization-partners-controls-gene-expression-during-stress-response-and-development(48d24437-caa0-4a78-b814-61ada10ad91c).html