TY  - JOUR
A1  - Walper, Elisabeth
A1  - Weiste, Christoph
A1  - Mueller, Martin J.
A1  - Hamberg, Mats
A1  - Dröge-Laser, Wolfgang
T1  - Screen Identifying Arabidopsis Transcription Factors Involved in the Response to 9-Lipoxygenase-Derived Oxylipins
JF  - PLoS One
N2  - 13-Lipoxygenase-derived oxylipins, such as jasmonates act as potent signaling molecules in plants. Although experimental evidence supports the impact of oxylipins generated by the 9-Lipoxygenase (9-LOX) pathway in root development and pathogen defense, their signaling function in plants remains largely elusive. Based on the root growth inhibiting properties of the 9-LOX-oxylipin 9-HOT (9-hydroxy-10,12,15-octadecatrienoic acid), we established a screening approach aiming at identifying transcription factors (TFs) involved in signaling and/or metabolism of this oxylipin. Making use of the AtTORF-Ex (Arabidopsis thaliana Transcription Factor Open Reading Frame Expression) collection of plant lines overexpressing TF genes, we screened for those TFs which restore root growth on 9-HOT. Out of 6,000 lines, eight TFs were recovered at least three times and were therefore selected for detailed analysis. Overexpression of the basic leucine Zipper (bZIP) TF TGA5 and its target, the monoxygenase CYP81D11 reduced the effect of added 9-HOT, presumably due to activation of a detoxification pathway. The highly related ETHYLENE RESPONSE FACTORs ERF106 and ERF107 induce a broad detoxification response towards 9-LOX-oxylipins and xenobiotic compounds. From a set of 18 related group S-bZIP factors isolated in the screen, bZIP11 is known to participate in auxin-mediated root growth and may connect oxylipins to root meristem function. The TF candidates isolated in this screen provide starting points for further attempts to dissect putative signaling pathways involving 9-LOX-derived oxylipins.
KW  - Jasmonic acid
KW  - root growth
KW  - arabidopsis thaliana
KW  - detoxification
KW  - seedlings
KW  - stress signaling cascade
KW  - hyperexpression techniques
KW  - ranscription factors
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-146857
VL  - 11
IS  - 4
ER  - 
TY  - JOUR
A1  - Horn, Hannes
A1  - Keller, Alexander
A1  - Hildebrandt, Ulrich
A1  - Kämpfer, Peter
A1  - Riederer, Markus
A1  - Hentschel, Ute
T1  - Draft genome of the \(Arabidopsis\) \(thaliana\) phyllosphere bacterium, \(Williamsia\) sp. ARP1
JF  - Standards in Genomic Sciences
N2  - The Gram-positive actinomycete \(Williamsia\) sp. ARP1 was originally isolated from the \(Arabidopsis\) \(thaliana\) phyllosphere. Here we describe the general physiological features of this microorganism together with the draft genome sequence and annotation. The 4,745,080 bp long genome contains 4434 protein-coding genes and 70 RNA genes. To our knowledge, this is only the second reported genome from the genus \(Williamsia\) and the first sequenced strain from the phyllosphere. The presented genomic information is interpreted in the context of an adaptation to the phyllosphere habitat.
KW  - arabidopsis thaliana
KW  - whole genome sequencing
KW  - adaption
KW  - Williamsia sp. ARP1
KW  - phyllosphere
KW  - draft genome
KW  - next generation sequencing
KW  - assembly
KW  - annotation
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-146008
VL  - 11
IS  - 8
ER  -