Abstract
The TATA binding protein-associated factor 5 (TAF5) is a subunit of TFIID and SAGA complexes involved in RNA polymerase II transcription initiation and histone acetylation. Although members of the putative SAGA complex in Arabidopsis such as GCN5 and ADA2b have important roles in plant development and abiotic stress responses, the function of other components of the Arabidopsis putative SAGA complex, like TAF5, is unknown. We used reverse genetics to elucidate the biological role of TAF5 in Arabidopsis thaliana. The absence of homozygote taf5 mutants indicated that AtTAF5 is an essential gene for the plant viability. Genetic approaches also revealed that AtTAF5 plays a critical role in regulatory mechanisms involved in male gametogenesis and pollen tube growth. Moreover, Arabidopsis taf5 heterozygous mutants displayed terminal flower-like phenotype, suggesting that TAF5 could be involved in molecular mechanisms that regulate indeterminate inflorescence meristems. Therefore, this work suggests that Arabidopsis TAF5 is necessary and sufficient for a complete plant life cycle.
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Acknowledgments
We thank Drs Amy Hark (Muhlenberg College) and Vasilis Gegas (John Innes Centre) for thoughtful discussions during the course of this work. We also thank Dr Maria Moustaka and Savvas Genitsaris (Aristotle University of Thessaloniki) for the assistance with fluorescence microscopy. This research was supported by Greek General Secretary of Research and Technology grant number 82337 and by funds from Aristotle University of Thessaloniki, School of Biology to KV.
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Mougiou, N., Poulios, S., Kaldis, A. et al. Arabidopsis thaliana TBP-associated factor 5 is essential for plant growth and development. Mol Breeding 30, 355–366 (2012). https://doi.org/10.1007/s11032-011-9626-2
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DOI: https://doi.org/10.1007/s11032-011-9626-2