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Transcriptional regulation by an NAC (NAM-ATAF1,2-CUC2) transcription factor attenuates ABA signalling for efficient basal defence towardsBlumeria graminisf. sp.hordeiin Arabidopsis
| Content Provider | Scilit |
|---|---|
| Author | Jensen, Michael K. Hagedorn, Peter H. de Torres-Zabala, Marta Grant, Murray R. Rung, Jesper H. Collinge, David B. Lyngkjaer, Michael F. |
| Copyright Year | 2008 |
| Description | Journal: The Plant Journal ATAF1 is a member of a largely uncharacterized plant-specific gene family encoding NAC transcription factors, and is induced in response to various abiotic and biotic stimuli in Arabidopsis thaliana. Previously, we showed that a mutant allele of ATAF1 compromises penetration resistance in Arabidopsis with respect to the non-host biotrophic pathogen Blumeria graminis f. sp. hordei (Bgh). In this study, we have used genome-wide transcript profiling to characterize signalling perturbations in ataf1 plants following Bgh inoculation. Comparative transcriptomic analyses identified an over-representation of abscisic acid (ABA)-responsive genes, including the ABA biosynthesis gene AAO3, which is significantly induced in ataf1 plants compared to wild-type plants following inoculation with Bgh. Additionally, we show that Bgh inoculation results in decreased endogenous ABA levels in an ATAF1-dependent manner, and that the ABA biosynthetic mutant aao3 showed increased penetration resistance to Bgh compared to wild-type plants. Furthermore, we show that ataf1 plants show ABA-hyposensitive phenotypes during seedling development and germination. Our data support a negative correlation between ABA levels and penetration resistance, and identify ATAF1 as a new stimuli-dependent attenuator of ABA signalling for the mediation of efficient penetration resistance in Arabidopsis upon Bgh attack. |
| Related Links | http://onlinelibrary.wiley.com/doi/10.1111/j.1365-313X.2008.03646.x/pdf |
| Ending Page | 880 |
| Page Count | 14 |
| Starting Page | 867 |
| e-ISSN | 1365313X |
| DOI | 10.1111/j.1365-313x.2008.03646.x |
| Journal | The Plant Journal |
| Issue Number | 6 |
| Volume Number | 56 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2008-12-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: The Plant Journal Plant Sciences Penetration Resistance Transcriptome Analysis Plant–microbe Interactions |
| Content Type | Text |
| Resource Type | Article |
